ASME B16.5-2025 · North America, Middle East, South-East Asia
ASME B16.5 flange dimensions — size chart and bolt patterns
ASME B16.5 is the baseline American flange standard for pipe sizes NPS 1/2 to NPS 24 in pressure classes 150 through 2500. It defines outside diameter, flange thickness, raised-face diameter and height, bolt circle, bolt count, bolt hole diameter and hub geometry for weld neck, slip-on, blind, socket-weld, threaded and lap-joint flanges.
Because B16.5 is organised by nominal pipe size and class, a flange is only interchangeable with another B16.5 flange of the same size, class and facing. Class sets the wall thickness, bolt count and bolt size; the actual allowable pressure is read from the B16.5 pressure–temperature tables for the material group and design temperature. Above NPS 24, ASME B16.47 takes over — the two standards are not interchangeable. Coverage limits are part of the standard: Class 2500 runs only to NPS 12 and has no slip-on flanges, Class 1500 slip-on flanges stop at NPS 2-1/2, and Classes 900, 1500 and 2500 have no NPS 3-1/2.
Edition
ASME B16.5-2025
Sizes
1/2″–24″
Ratings
Class 150 · Class 300 · Class 400 · Class 600 · Class 900 · Class 1500 · Class 2500
Flange types
Weld Neck · Slip-On · Blind
Region
North America, Middle East, South-East Asia
Size pages
382
Dimensions are in millimetres; ASME inch equivalents are shown in brackets. Bolt hole diameter is the through-hole and flange thickness excludes the raised-face height (1.5 mm for Classes 150 and 300, 6.4 mm for Classes 400 to 2500). Every size links to its own specification page with the material options, facing details and certification information. Raised face (RF) is standard: 1.5 mm high for Classes 150 and 300, 6.4 mm for Classes 400 to 2500, added to the minimum flange thickness. Flat face (FF) and ring-type joint (RTJ) faces are available on request.
Edition note. Dimension values on this page have been checked cell by cell against ASME B16.5-2025, using both the SI and U.S. Customary tables. The 2025 edition revised the bore (B) dimension figures and the minimum hub-height method, neither of which is a field published in these tables; outside diameter, thickness, hub, length, bolt circle and bolt-hole values match the 2025 edition. Raised-face height follows the 2025 rule: 1.5 mm for Classes 150 and 300, 6.4 mm for Classes 400 to 2500.
Weld Neck Flanges — ASME B16.5
Weld Neck product page →Butt-weld connection with a tapered hub; standard for high pressure, high temperature and cyclic service.
ASME B16.5 Class 150 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 88.9 mm (3.5″) | 9.7 mm (0.38″) | 35.1 mm (1.38″) | 60.5 mm (2.38″) | 4 × Ø15.9 mm (0.63″) | 30.2 mm (1.19″) | 46 mm (1.81″) | 0.9 kg | Details → |
| 3/4″ | 20 | 98.6 mm (3.88″) | 11.2 mm (0.44″) | 42.9 mm (1.69″) | 69.9 mm (2.75″) | 4 × Ø15.9 mm (0.63″) | 38.1 mm (1.5″) | 50.8 mm (2″) | 0.9 kg | Details → |
| 1″ | 25 | 108 mm (4.25″) | 12.7 mm (0.5″) | 50.8 mm (2″) | 79.2 mm (3.12″) | 4 × Ø15.9 mm (0.63″) | 49.3 mm (1.94″) | 53.8 mm (2.12″) | 1.4 kg | Details → |
| 1¼″ | 32 | 117.3 mm (4.62″) | 14.2 mm (0.56″) | 63.5 mm (2.5″) | 88.9 mm (3.5″) | 4 × Ø15.9 mm (0.63″) | 58.7 mm (2.31″) | 55.6 mm (2.19″) | 1.4 kg | Details → |
| 1½″ | 40 | 127 mm (5″) | 15.7 mm (0.62″) | 73.2 mm (2.88″) | 98.6 mm (3.88″) | 4 × Ø15.9 mm (0.63″) | 65 mm (2.56″) | 60.5 mm (2.38″) | 1.8 kg | Details → |
| 2″ | 50 | 152.4 mm (6″) | 17.5 mm (0.69″) | 91.9 mm (3.62″) | 120.7 mm (4.75″) | 4 × Ø19.1 mm (0.75″) | 77.7 mm (3.06″) | 62 mm (2.44″) | 2.7 kg | Details → |
| 2½″ | 65 | 177.8 mm (7″) | 20.6 mm (0.81″) | 104.6 mm (4.12″) | 139.7 mm (5.5″) | 4 × Ø19.1 mm (0.75″) | 90.4 mm (3.56″) | 68.3 mm (2.69″) | 3.6 kg | Details → |
| 3″ | 80 | 190.5 mm (7.5″) | 22.4 mm (0.88″) | 127 mm (5″) | 152.4 mm (6″) | 4 × Ø19.1 mm (0.75″) | 108 mm (4.25″) | 68.3 mm (2.69″) | 4.5 kg | Details → |
| 3½″ | 90 | 215.9 mm (8.5″) | 22.4 mm (0.88″) | 139.7 mm (5.5″) | 177.8 mm (7″) | 8 × Ø19.1 mm (0.75″) | 122.2 mm (4.81″) | 69.9 mm (2.75″) | 5.4 kg | Details → |
| 4″ | 100 | 228.6 mm (9″) | 22.4 mm (0.88″) | 157.2 mm (6.19″) | 190.5 mm (7.5″) | 8 × Ø19.1 mm (0.75″) | 134.9 mm (5.31″) | 74.7 mm (2.94″) | 6.8 kg | Details → |
| 5″ | 125 | 254 mm (10″) | 22.4 mm (0.88″) | 185.7 mm (7.31″) | 215.9 mm (8.5″) | 8 × Ø22.2 mm (0.87″) | 163.6 mm (6.44″) | 87.4 mm (3.44″) | 8.6 kg | Details → |
| 6″ | 150 | 279.4 mm (11″) | 23.9 mm (0.94″) | 215.9 mm (8.5″) | 241.3 mm (9.5″) | 8 × Ø22.2 mm (0.87″) | 192 mm (7.56″) | 87.4 mm (3.44″) | 10.9 kg | Details → |
| 8″ | 200 | 342.9 mm (13.5″) | 26.9 mm (1.06″) | 269.7 mm (10.62″) | 298.5 mm (11.75″) | 8 × Ø22.2 mm (0.87″) | 246.1 mm (9.69″) | 100.1 mm (3.94″) | 17.7 kg | Details → |
| 10″ | 250 | 406.4 mm (16″) | 28.4 mm (1.12″) | 323.9 mm (12.75″) | 362 mm (14.25″) | 12 × Ø25.4 mm (1″) | 304.8 mm (12″) | 100.1 mm (3.94″) | 23.6 kg | Details → |
| 12″ | 300 | 482.6 mm (19″) | 30.2 mm (1.19″) | 381 mm (15″) | 431.8 mm (17″) | 12 × Ø25.4 mm (1″) | 365.3 mm (14.38″) | 112.8 mm (4.44″) | 36.3 kg | Details → |
| 14″ | 350 | 533.4 mm (21″) | 33.3 mm (1.31″) | 412.8 mm (16.25″) | 476.3 mm (18.75″) | 12 × Ø28.6 mm (1.13″) | 400.1 mm (15.75″) | 125.5 mm (4.94″) | 49.9 kg | Details → |
| 16″ | 400 | 596.9 mm (23.5″) | 35.1 mm (1.38″) | 469.9 mm (18.5″) | 539.8 mm (21.25″) | 16 × Ø28.6 mm (1.13″) | 457.2 mm (18″) | 125.5 mm (4.94″) | 63.5 kg | Details → |
| 18″ | 450 | 635 mm (25″) | 38.1 mm (1.5″) | 533.4 mm (21″) | 577.9 mm (22.75″) | 16 × Ø31.8 mm (1.25″) | 505 mm (19.88″) | 138.2 mm (5.44″) | 68 kg | Details → |
| 20″ | 500 | 698.5 mm (27.5″) | 41.1 mm (1.62″) | 584.2 mm (23″) | 635 mm (25″) | 20 × Ø31.8 mm (1.25″) | 558.8 mm (22″) | 142.7 mm (5.62″) | 81.6 kg | Details → |
| 22″ | 550 | 749.3 mm (29.5″) | 44.5 mm (1.75″) | 641.4 mm (25.25″) | 692.2 mm (27.25″) | 20 × Ø28.6 mm (1.13″) | 609.6 mm (24″) | 147.8 mm (5.82″) | — | Details → |
| 24″ | 600 | 812.8 mm (32″) | 46 mm (1.81″) | 692.2 mm (27.25″) | 749.3 mm (29.5″) | 20 × Ø34.9 mm (1.37″) | 663.4 mm (26.12″) | 150.9 mm (5.94″) | 118 kg | Details → |
21 sizes · ASME B16.5 Class 150 · ASME B16.5-2025
ASME B16.5 Class 300 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 12.7 mm (0.5″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 38.1 mm (1.5″) | 50.8 mm (2″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 14.2 mm (0.56″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 47.8 mm (1.88″) | 55.6 mm (2.19″) | 1.4 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 15.7 mm (0.62″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 53.8 mm (2.12″) | 60.5 mm (2.38″) | 1.8 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 17.5 mm (0.69″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 63.5 mm (2.5″) | 63.5 mm (2.5″) | 2.3 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 19.1 mm (0.75″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 69.9 mm (2.75″) | 66.8 mm (2.63″) | 3.2 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 20.6 mm (0.81″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 84.1 mm (3.31″) | 68.3 mm (2.69″) | 4.1 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 23.9 mm (0.94″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 100.1 mm (3.94″) | 74.7 mm (2.94″) | 5.4 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 26.9 mm (1.06″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 117.3 mm (4.62″) | 77.7 mm (3.06″) | 6.8 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 28.4 mm (1.12″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø22.2 mm (0.87″) | 133.4 mm (5.25″) | 79.5 mm (3.13″) | 8.2 kg | Details → |
| 4″ | 100 | 254 mm (10″) | 30.2 mm (1.19″) | 157.2 mm (6.19″) | 200.2 mm (7.88″) | 8 × Ø22.2 mm (0.87″) | 146.1 mm (5.75″) | 84.3 mm (3.32″) | 11.3 kg | Details → |
| 5″ | 125 | 279.4 mm (11″) | 33.3 mm (1.31″) | 185.7 mm (7.31″) | 235 mm (9.25″) | 8 × Ø22.2 mm (0.87″) | 177.8 mm (7″) | 97 mm (3.82″) | 14.5 kg | Details → |
| 6″ | 150 | 317.5 mm (12.5″) | 35.1 mm (1.38″) | 215.9 mm (8.5″) | 269.7 mm (10.62″) | 12 × Ø22.2 mm (0.87″) | 206.2 mm (8.12″) | 97 mm (3.82″) | 19.1 kg | Details → |
| 8″ | 200 | 381 mm (15″) | 39.6 mm (1.56″) | 269.7 mm (10.62″) | 330.2 mm (13″) | 12 × Ø25.4 mm (1″) | 260.4 mm (10.25″) | 109.7 mm (4.32″) | 30.4 kg | Details → |
| 10″ | 250 | 444.5 mm (17.5″) | 46 mm (1.81″) | 323.9 mm (12.75″) | 387.4 mm (15.25″) | 16 × Ø28.6 mm (1.13″) | 320.5 mm (12.62″) | 115.8 mm (4.56″) | 41.3 kg | Details → |
| 12″ | 300 | 520.7 mm (20.5″) | 49.3 mm (1.94″) | 381 mm (15″) | 450.9 mm (17.75″) | 16 × Ø31.8 mm (1.25″) | 374.7 mm (14.75″) | 128.5 mm (5.06″) | 63.5 kg | Details → |
| 14″ | 350 | 584.2 mm (23″) | 52.3 mm (2.06″) | 412.8 mm (16.25″) | 514.4 mm (20.25″) | 20 × Ø31.8 mm (1.25″) | 425.5 mm (16.75″) | 141.2 mm (5.56″) | 81.6 kg | Details → |
| 16″ | 400 | 647.7 mm (25.5″) | 55.6 mm (2.19″) | 469.9 mm (18.5″) | 571.5 mm (22.5″) | 20 × Ø34.9 mm (1.37″) | 482.6 mm (19″) | 144.5 mm (5.69″) | 113 kg | Details → |
| 18″ | 450 | 711.2 mm (28″) | 58.7 mm (2.31″) | 533.4 mm (21″) | 628.7 mm (24.75″) | 24 × Ø34.9 mm (1.37″) | 533.4 mm (21″) | 157.2 mm (6.19″) | 145 kg | Details → |
| 20″ | 500 | 774.7 mm (30.5″) | 62 mm (2.44″) | 584.2 mm (23″) | 685.8 mm (27″) | 24 × Ø34.9 mm (1.37″) | 587.2 mm (23.12″) | 160.5 mm (6.32″) | 181 kg | Details → |
| 22″ | 550 | 838.2 mm (33″) | 65 mm (2.56″) | 641.4 mm (25.25″) | 743 mm (29.25″) | 24 × Ø41.3 mm (1.63″) | 641.4 mm (25.25″) | 163.6 mm (6.44″) | — | Details → |
| 24″ | 600 | 914.4 mm (36″) | 68.3 mm (2.69″) | 692.2 mm (27.25″) | 812.8 mm (32″) | 24 × Ø41.3 mm (1.63″) | 701.5 mm (27.62″) | 166.6 mm (6.56″) | 263 kg | Details → |
21 sizes · ASME B16.5 Class 300 · ASME B16.5-2025
ASME B16.5 Class 400 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 14.2 mm (0.56″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 38.1 mm (1.5″) | 52.3 mm (2.06″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 15.7 mm (0.62″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 47.8 mm (1.88″) | 57.2 mm (2.25″) | 1.8 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 17.5 mm (0.69″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 53.8 mm (2.12″) | 62 mm (2.44″) | 1.8 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 20.6 mm (0.81″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 63.5 mm (2.5″) | 66.5 mm (2.62″) | 2.7 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 22.4 mm (0.88″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 69.9 mm (2.75″) | 69.9 mm (2.75″) | 3.6 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 25.4 mm (1″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 84.1 mm (3.31″) | 73.2 mm (2.88″) | 5.4 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 28.4 mm (1.12″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 100.1 mm (3.94″) | 79.2 mm (3.12″) | 8.2 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 31.8 mm (1.25″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 117.3 mm (4.62″) | 82.6 mm (3.25″) | 10.4 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 35.1 mm (1.38″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø25.4 mm (1″) | 133.4 mm (5.25″) | 85.9 mm (3.38″) | 11.8 kg | Details → |
| 4″ | 100 | 254 mm (10″) | 35.1 mm (1.38″) | 157.2 mm (6.19″) | 200.2 mm (7.88″) | 8 × Ø25.4 mm (1″) | 146.1 mm (5.75″) | 88.9 mm (3.5″) | 15.9 kg | Details → |
| 5″ | 125 | 279.4 mm (11″) | 38.1 mm (1.5″) | 185.7 mm (7.31″) | 235 mm (9.25″) | 8 × Ø25.4 mm (1″) | 177.8 mm (7″) | 101.6 mm (4″) | 19.5 kg | Details → |
| 6″ | 150 | 317.5 mm (12.5″) | 41.1 mm (1.62″) | 215.9 mm (8.5″) | 269.7 mm (10.62″) | 12 × Ø25.4 mm (1″) | 206.2 mm (8.12″) | 103.1 mm (4.06″) | 25.9 kg | Details → |
| 8″ | 200 | 381 mm (15″) | 47.8 mm (1.88″) | 269.7 mm (10.62″) | 330.2 mm (13″) | 12 × Ø28.6 mm (1.13″) | 260.4 mm (10.25″) | 117.3 mm (4.62″) | 40.4 kg | Details → |
| 10″ | 250 | 444.5 mm (17.5″) | 53.8 mm (2.12″) | 323.9 mm (12.75″) | 387.4 mm (15.25″) | 16 × Ø31.8 mm (1.25″) | 320.5 mm (12.62″) | 124 mm (4.88″) | 56.7 kg | Details → |
| 12″ | 300 | 520.7 mm (20.5″) | 57.2 mm (2.25″) | 381 mm (15″) | 450.9 mm (17.75″) | 16 × Ø34.9 mm (1.37″) | 374.7 mm (14.75″) | 136.7 mm (5.38″) | 79.4 kg | Details → |
| 14″ | 350 | 584.2 mm (23″) | 60.5 mm (2.38″) | 412.8 mm (16.25″) | 514.4 mm (20.25″) | 20 × Ø34.9 mm (1.37″) | 425.5 mm (16.75″) | 149.4 mm (5.88″) | 104 kg | Details → |
| 16″ | 400 | 647.7 mm (25.5″) | 63.5 mm (2.5″) | 469.9 mm (18.5″) | 571.5 mm (22.5″) | 20 × Ø38.1 mm (1.5″) | 482.6 mm (19″) | 152.4 mm (6″) | 134 kg | Details → |
| 18″ | 450 | 711.2 mm (28″) | 66.5 mm (2.62″) | 533.4 mm (21″) | 628.7 mm (24.75″) | 24 × Ø38.1 mm (1.5″) | 533.4 mm (21″) | 165.1 mm (6.5″) | 159 kg | Details → |
| 20″ | 500 | 774.7 mm (30.5″) | 69.9 mm (2.75″) | 584.2 mm (23″) | 685.8 mm (27″) | 24 × Ø41.3 mm (1.63″) | 587.2 mm (23.12″) | 168.1 mm (6.62″) | 193 kg | Details → |
| 22″ | 550 | 838.2 mm (33″) | 73.2 mm (2.88″) | 641.4 mm (25.25″) | 743 mm (29.25″) | 24 × Ø44.5 mm (1.75″) | 641.4 mm (25.25″) | 171.5 mm (6.75″) | — | Details → |
| 24″ | 600 | 914.4 mm (36″) | 76.2 mm (3″) | 692.2 mm (27.25″) | 812.8 mm (32″) | 24 × Ø47.6 mm (1.87″) | 701.5 mm (27.62″) | 174.8 mm (6.88″) | 281 kg | Details → |
21 sizes · ASME B16.5 Class 400 · ASME B16.5-2025
ASME B16.5 Class 600 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 14.2 mm (0.56″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 38.1 mm (1.5″) | 52.3 mm (2.06″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 15.7 mm (0.62″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 47.8 mm (1.88″) | 57.2 mm (2.25″) | 1.8 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 17.5 mm (0.69″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 53.8 mm (2.12″) | 62 mm (2.44″) | 1.8 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 20.6 mm (0.81″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 63.5 mm (2.5″) | 66.5 mm (2.62″) | 2.7 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 22.4 mm (0.88″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 69.9 mm (2.75″) | 69.9 mm (2.75″) | 3.6 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 25.4 mm (1″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 84.1 mm (3.31″) | 73.2 mm (2.88″) | 5.4 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 28.4 mm (1.12″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 100.1 mm (3.94″) | 79.2 mm (3.12″) | 8.2 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 31.8 mm (1.25″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 117.3 mm (4.62″) | 82.6 mm (3.25″) | 10.4 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 35.1 mm (1.38″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø25.4 mm (1″) | 133.4 mm (5.25″) | 85.9 mm (3.38″) | 11.8 kg | Details → |
| 4″ | 100 | 273.1 mm (10.75″) | 38.1 mm (1.5″) | 157.2 mm (6.19″) | 215.9 mm (8.5″) | 8 × Ø25.4 mm (1″) | 152.4 mm (6″) | 101.6 mm (4″) | 19.1 kg | Details → |
| 5″ | 125 | 330.2 mm (13″) | 44.5 mm (1.75″) | 185.7 mm (7.31″) | 266.7 mm (10.5″) | 8 × Ø28.6 mm (1.13″) | 189 mm (7.44″) | 114.3 mm (4.5″) | 30.8 kg | Details → |
| 6″ | 150 | 355.6 mm (14″) | 47.8 mm (1.88″) | 215.9 mm (8.5″) | 292.1 mm (11.5″) | 12 × Ø28.6 mm (1.13″) | 222.3 mm (8.75″) | 117.3 mm (4.62″) | 36.7 kg | Details → |
| 8″ | 200 | 419.1 mm (16.5″) | 55.6 mm (2.19″) | 269.7 mm (10.62″) | 349.3 mm (13.75″) | 12 × Ø31.8 mm (1.25″) | 273.1 mm (10.75″) | 133.4 mm (5.25″) | 54.4 kg | Details → |
| 10″ | 250 | 508 mm (20″) | 63.5 mm (2.5″) | 323.9 mm (12.75″) | 431.8 mm (17″) | 16 × Ø34.9 mm (1.37″) | 342.9 mm (13.5″) | 152.4 mm (6″) | 86.2 kg | Details → |
| 12″ | 300 | 558.8 mm (22″) | 66.5 mm (2.62″) | 381 mm (15″) | 489 mm (19.25″) | 20 × Ø34.9 mm (1.37″) | 400.1 mm (15.75″) | 155.4 mm (6.12″) | 102 kg | Details → |
| 14″ | 350 | 603.3 mm (23.75″) | 69.9 mm (2.75″) | 412.8 mm (16.25″) | 527.1 mm (20.75″) | 20 × Ø38.1 mm (1.5″) | 431.8 mm (17″) | 165.1 mm (6.5″) | 127 kg | Details → |
| 16″ | 400 | 685.8 mm (27″) | 76.2 mm (3″) | 469.9 mm (18.5″) | 603.3 mm (23.75″) | 20 × Ø41.3 mm (1.63″) | 495.3 mm (19.5″) | 177.8 mm (7″) | 177 kg | Details → |
| 18″ | 450 | 743 mm (29.25″) | 82.6 mm (3.25″) | 533.4 mm (21″) | 654.1 mm (25.75″) | 20 × Ø44.5 mm (1.75″) | 546.1 mm (21.5″) | 184.2 mm (7.25″) | 215 kg | Details → |
| 20″ | 500 | 812.8 mm (32″) | 88.9 mm (3.5″) | 584.2 mm (23″) | 723.9 mm (28.5″) | 24 × Ø44.5 mm (1.75″) | 609.6 mm (24″) | 190.5 mm (7.5″) | 268 kg | Details → |
| 22″ | 550 | 870 mm (34.25″) | 95.3 mm (3.75″) | 641.4 mm (25.25″) | 777.7 mm (30.62″) | 24 × Ø47.6 mm (1.87″) | 666.8 mm (26.25″) | 196.9 mm (7.75″) | — | Details → |
| 24″ | 600 | 939.8 mm (37″) | 101.6 mm (4″) | 692.2 mm (27.25″) | 838.2 mm (33″) | 24 × Ø50.8 mm (2″) | 717.6 mm (28.25″) | 203.2 mm (8″) | 376 kg | Details → |
21 sizes · ASME B16.5 Class 600 · ASME B16.5-2025
ASME B16.5 Class 900 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 120.7 mm (4.75″) | 22.4 mm (0.88″) | 35.1 mm (1.38″) | 82.6 mm (3.25″) | 4 × Ø22.2 mm (0.87″) | 38.1 mm (1.5″) | 60.5 mm (2.38″) | 2.3 kg | Details → |
| 3/4″ | 20 | 130 mm (5.12″) | 25.4 mm (1″) | 42.9 mm (1.69″) | 88.9 mm (3.5″) | 4 × Ø22.2 mm (0.87″) | 44.5 mm (1.75″) | 69.9 mm (2.75″) | 2.7 kg | Details → |
| 1″ | 25 | 149.4 mm (5.88″) | 28.4 mm (1.12″) | 50.8 mm (2″) | 101.6 mm (4″) | 4 × Ø25.4 mm (1″) | 52.3 mm (2.06″) | 73.2 mm (2.88″) | 4.1 kg | Details → |
| 1¼″ | 32 | 158.8 mm (6.25″) | 28.4 mm (1.12″) | 63.5 mm (2.5″) | 111.3 mm (4.38″) | 4 × Ø25.4 mm (1″) | 63.5 mm (2.5″) | 73.2 mm (2.88″) | 4.5 kg | Details → |
| 1½″ | 40 | 177.8 mm (7″) | 31.8 mm (1.25″) | 73.2 mm (2.88″) | 124 mm (4.88″) | 4 × Ø28.6 mm (1.13″) | 69.9 mm (2.75″) | 82.6 mm (3.25″) | 5.9 kg | Details → |
| 2″ | 50 | 215.9 mm (8.5″) | 38.1 mm (1.5″) | 91.9 mm (3.62″) | 165.1 mm (6.5″) | 8 × Ø25.4 mm (1″) | 104.6 mm (4.12″) | 101.6 mm (4″) | 11.3 kg | Details → |
| 2½″ | 65 | 244.3 mm (9.62″) | 41.1 mm (1.62″) | 104.6 mm (4.12″) | 190.5 mm (7.5″) | 8 × Ø28.6 mm (1.13″) | 124 mm (4.88″) | 104.6 mm (4.12″) | 16.3 kg | Details → |
| 3″ | 80 | 241.3 mm (9.5″) | 38.1 mm (1.5″) | 127 mm (5″) | 190.5 mm (7.5″) | 8 × Ø25.4 mm (1″) | 127 mm (5″) | 101.6 mm (4″) | 14.1 kg | Details → |
| 4″ | 100 | 292.1 mm (11.5″) | 44.5 mm (1.75″) | 157.2 mm (6.19″) | 235 mm (9.25″) | 8 × Ø31.8 mm (1.25″) | 158.8 mm (6.25″) | 114.3 mm (4.5″) | 24 kg | Details → |
| 5″ | 125 | 349.3 mm (13.75″) | 50.8 mm (2″) | 185.7 mm (7.31″) | 279.4 mm (11″) | 8 × Ø34.9 mm (1.37″) | 190.5 mm (7.5″) | 127 mm (5″) | 39 kg | Details → |
| 6″ | 150 | 381 mm (15″) | 55.6 mm (2.19″) | 215.9 mm (8.5″) | 317.5 mm (12.5″) | 12 × Ø31.8 mm (1.25″) | 235 mm (9.25″) | 139.7 mm (5.5″) | 49.9 kg | Details → |
| 8″ | 200 | 469.9 mm (18.5″) | 63.5 mm (2.5″) | 269.7 mm (10.62″) | 393.7 mm (15.5″) | 12 × Ø38.1 mm (1.5″) | 298.5 mm (11.75″) | 162.1 mm (6.38″) | 79.4 kg | Details → |
| 10″ | 250 | 546.1 mm (21.5″) | 69.9 mm (2.75″) | 323.9 mm (12.75″) | 469.9 mm (18.5″) | 16 × Ø38.1 mm (1.5″) | 368.3 mm (14.5″) | 184.2 mm (7.25″) | 118 kg | Details → |
| 12″ | 300 | 609.6 mm (24″) | 79.2 mm (3.12″) | 381 mm (15″) | 533.4 mm (21″) | 20 × Ø38.1 mm (1.5″) | 419.1 mm (16.5″) | 200.2 mm (7.88″) | 147 kg | Details → |
| 14″ | 350 | 641.4 mm (25.25″) | 85.9 mm (3.38″) | 412.8 mm (16.25″) | 558.8 mm (22″) | 20 × Ø41.3 mm (1.63″) | 450.9 mm (17.75″) | 212.9 mm (8.38″) | 181 kg | Details → |
| 16″ | 400 | 704.9 mm (27.75″) | 88.9 mm (3.5″) | 469.9 mm (18.5″) | 616 mm (24.25″) | 20 × Ø44.5 mm (1.75″) | 508 mm (20″) | 215.9 mm (8.5″) | 225 kg | Details → |
| 18″ | 450 | 787.4 mm (31″) | 101.6 mm (4″) | 533.4 mm (21″) | 685.8 mm (27″) | 20 × Ø50.8 mm (2″) | 565.2 mm (22.25″) | 228.6 mm (9″) | 308 kg | Details → |
| 20″ | 500 | 857.3 mm (33.75″) | 108 mm (4.25″) | 584.2 mm (23″) | 749.3 mm (29.5″) | 20 × Ø54 mm (2.13″) | 622.3 mm (24.5″) | 247.7 mm (9.75″) | 376 kg | Details → |
| 24″ | 600 | 1041.4 mm (41″) | 139.7 mm (5.5″) | 692.2 mm (27.25″) | 901.7 mm (35.5″) | 20 × Ø66.7 mm (2.63″) | 749.3 mm (29.5″) | 292.1 mm (11.5″) | 680 kg | Details → |
19 sizes · ASME B16.5 Class 900 · ASME B16.5-2025
ASME B16.5 Class 1500 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 120.7 mm (4.75″) | 22.4 mm (0.88″) | 35.1 mm (1.38″) | 82.6 mm (3.25″) | 4 × Ø22.2 mm (0.87″) | 38.1 mm (1.5″) | 60.5 mm (2.38″) | 2.3 kg | Details → |
| 3/4″ | 20 | 130 mm (5.12″) | 25.4 mm (1″) | 42.9 mm (1.69″) | 88.9 mm (3.5″) | 4 × Ø22.2 mm (0.87″) | 44.5 mm (1.75″) | 69.9 mm (2.75″) | 2.7 kg | Details → |
| 1″ | 25 | 149.4 mm (5.88″) | 28.4 mm (1.12″) | 50.8 mm (2″) | 101.6 mm (4″) | 4 × Ø25.4 mm (1″) | 52.3 mm (2.06″) | 73.2 mm (2.88″) | 4.1 kg | Details → |
| 1¼″ | 32 | 158.8 mm (6.25″) | 28.4 mm (1.12″) | 63.5 mm (2.5″) | 111.3 mm (4.38″) | 4 × Ø25.4 mm (1″) | 63.5 mm (2.5″) | 73.2 mm (2.88″) | 4.5 kg | Details → |
| 1½″ | 40 | 177.8 mm (7″) | 31.8 mm (1.25″) | 73.2 mm (2.88″) | 124 mm (4.88″) | 4 × Ø28.6 mm (1.13″) | 69.9 mm (2.75″) | 82.6 mm (3.25″) | 5.9 kg | Details → |
| 2″ | 50 | 215.9 mm (8.5″) | 38.1 mm (1.5″) | 91.9 mm (3.62″) | 165.1 mm (6.5″) | 8 × Ø25.4 mm (1″) | 104.6 mm (4.12″) | 101.6 mm (4″) | 11.3 kg | Details → |
| 2½″ | 65 | 244.3 mm (9.62″) | 41.1 mm (1.62″) | 104.6 mm (4.12″) | 190.5 mm (7.5″) | 8 × Ø28.6 mm (1.13″) | 124 mm (4.88″) | 104.6 mm (4.12″) | 16.3 kg | Details → |
| 3″ | 80 | 266.7 mm (10.5″) | 47.8 mm (1.88″) | 127 mm (5″) | 203.2 mm (8″) | 8 × Ø31.8 mm (1.25″) | 133.4 mm (5.25″) | 117.3 mm (4.62″) | 21.8 kg | Details → |
| 4″ | 100 | 311.2 mm (12.25″) | 53.8 mm (2.12″) | 157.2 mm (6.19″) | 241.3 mm (9.5″) | 8 × Ø34.9 mm (1.37″) | 162.1 mm (6.38″) | 124 mm (4.88″) | 33.1 kg | Details → |
| 5″ | 125 | 374.7 mm (14.75″) | 73.2 mm (2.88″) | 185.7 mm (7.31″) | 292.1 mm (11.5″) | 8 × Ø41.3 mm (1.63″) | 196.9 mm (7.75″) | 155.4 mm (6.12″) | 59 kg | Details → |
| 6″ | 150 | 393.7 mm (15.5″) | 82.6 mm (3.25″) | 215.9 mm (8.5″) | 317.5 mm (12.5″) | 12 × Ø38.1 mm (1.5″) | 228.6 mm (9″) | 171.5 mm (6.75″) | 74.8 kg | Details → |
| 8″ | 200 | 482.6 mm (19″) | 91.9 mm (3.62″) | 269.7 mm (10.62″) | 393.7 mm (15.5″) | 12 × Ø44.5 mm (1.75″) | 292.1 mm (11.5″) | 212.9 mm (8.38″) | 125 kg | Details → |
| 10″ | 250 | 584.2 mm (23″) | 108 mm (4.25″) | 323.9 mm (12.75″) | 482.6 mm (19″) | 12 × Ø50.8 mm (2″) | 368.3 mm (14.5″) | 254 mm (10″) | 206 kg | Details → |
| 12″ | 300 | 673.1 mm (26.5″) | 124 mm (4.88″) | 381 mm (15″) | 571.5 mm (22.5″) | 16 × Ø54 mm (2.13″) | 450.9 mm (17.75″) | 282.4 mm (11.12″) | 313 kg | Details → |
| 14″ | 350 | 749.3 mm (29.5″) | 133.4 mm (5.25″) | 412.8 mm (16.25″) | 635 mm (25″) | 16 × Ø60.3 mm (2.37″) | 495.3 mm (19.5″) | 298.5 mm (11.75″) | 426 kg | Details → |
| 16″ | 400 | 825.5 mm (32.5″) | 146.1 mm (5.75″) | 469.9 mm (18.5″) | 704.9 mm (27.75″) | 16 × Ø66.7 mm (2.63″) | 552.5 mm (21.75″) | 311.2 mm (12.25″) | 567 kg | Details → |
| 18″ | 450 | 914.4 mm (36″) | 162.1 mm (6.38″) | 533.4 mm (21″) | 774.7 mm (30.5″) | 16 × Ø73 mm (2.87″) | 596.9 mm (23.5″) | 327.2 mm (12.88″) | 737 kg | Details → |
| 20″ | 500 | 984.3 mm (38.75″) | 177.8 mm (7″) | 584.2 mm (23″) | 831.9 mm (32.75″) | 16 × Ø79.4 mm (3.13″) | 641.4 mm (25.25″) | 355.6 mm (14″) | 930 kg | Details → |
| 24″ | 600 | 1168.4 mm (46″) | 203.2 mm (8″) | 692.2 mm (27.25″) | 990.6 mm (39″) | 16 × Ø92.1 mm (3.63″) | 762 mm (30″) | 406.4 mm (16″) | 1508 kg | Details → |
19 sizes · ASME B16.5 Class 1500 · ASME B16.5-2025
ASME B16.5 Class 2500 weld neck flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 133.4 mm (5.25″) | 30.2 mm (1.19″) | 35.1 mm (1.38″) | 88.9 mm (3.5″) | 4 × Ø22.2 mm (0.87″) | 42.9 mm (1.69″) | 73.2 mm (2.88″) | 3.2 kg | Details → |
| 3/4″ | 20 | 139.7 mm (5.5″) | 31.8 mm (1.25″) | 42.9 mm (1.69″) | 95.3 mm (3.75″) | 4 × Ø22.2 mm (0.87″) | 50.8 mm (2″) | 79.2 mm (3.12″) | 3.6 kg | Details → |
| 1″ | 25 | 158.8 mm (6.25″) | 35.1 mm (1.38″) | 50.8 mm (2″) | 108 mm (4.25″) | 4 × Ø25.4 mm (1″) | 57.2 mm (2.25″) | 88.9 mm (3.5″) | 5.4 kg | Details → |
| 1¼″ | 32 | 184.2 mm (7.25″) | 38.1 mm (1.5″) | 63.5 mm (2.5″) | 130 mm (5.12″) | 4 × Ø28.6 mm (1.13″) | 73.2 mm (2.88″) | 95.3 mm (3.75″) | 7.7 kg | Details → |
| 1½″ | 40 | 203.2 mm (8″) | 44.5 mm (1.75″) | 73.2 mm (2.88″) | 146.1 mm (5.75″) | 4 × Ø31.8 mm (1.25″) | 79.2 mm (3.12″) | 111.3 mm (4.38″) | 11.3 kg | Details → |
| 2″ | 50 | 235 mm (9.25″) | 50.8 mm (2″) | 91.9 mm (3.62″) | 171.5 mm (6.75″) | 8 × Ø28.6 mm (1.13″) | 95.3 mm (3.75″) | 127 mm (5″) | 19.1 kg | Details → |
| 2½″ | 65 | 266.7 mm (10.5″) | 57.2 mm (2.25″) | 104.6 mm (4.12″) | 196.9 mm (7.75″) | 8 × Ø31.8 mm (1.25″) | 114.3 mm (4.5″) | 142.7 mm (5.62″) | 23.6 kg | Details → |
| 3″ | 80 | 304.8 mm (12″) | 66.5 mm (2.62″) | 127 mm (5″) | 228.6 mm (9″) | 8 × Ø34.9 mm (1.37″) | 133.4 mm (5.25″) | 168.1 mm (6.62″) | 42.6 kg | Details → |
| 4″ | 100 | 355.6 mm (14″) | 76.2 mm (3″) | 157.2 mm (6.19″) | 273.1 mm (10.75″) | 8 × Ø41.3 mm (1.63″) | 165.1 mm (6.5″) | 190.5 mm (7.5″) | 65.8 kg | Details → |
| 5″ | 125 | 419.1 mm (16.5″) | 91.9 mm (3.62″) | 185.7 mm (7.31″) | 323.9 mm (12.75″) | 8 × Ø47.6 mm (1.87″) | 203.2 mm (8″) | 228.6 mm (9″) | 111 kg | Details → |
| 6″ | 150 | 482.6 mm (19″) | 108 mm (4.25″) | 215.9 mm (8.5″) | 368.3 mm (14.5″) | 8 × Ø54 mm (2.13″) | 235 mm (9.25″) | 273.1 mm (10.75″) | 172 kg | Details → |
| 8″ | 200 | 552.5 mm (21.75″) | 127 mm (5″) | 269.7 mm (10.62″) | 438.2 mm (17.25″) | 12 × Ø54 mm (2.13″) | 304.8 mm (12″) | 317.5 mm (12.5″) | 263 kg | Details → |
| 10″ | 250 | 673.1 mm (26.5″) | 165.1 mm (6.5″) | 323.9 mm (12.75″) | 539.8 mm (21.25″) | 12 × Ø66.7 mm (2.63″) | 374.7 mm (14.75″) | 419.1 mm (16.5″) | 488 kg | Details → |
| 12″ | 300 | 762 mm (30″) | 184.2 mm (7.25″) | 381 mm (15″) | 619.3 mm (24.38″) | 12 × Ø73 mm (2.87″) | 441.5 mm (17.38″) | 463.6 mm (18.25″) | 692 kg | Details → |
14 sizes · ASME B16.5 Class 2500 · ASME B16.5-2025
Slip-On Flanges — ASME B16.5
Slip-On product page →Fillet-welded both sides over the pipe; economical for low-pressure utility lines and easy alignment.
ASME B16.5 Class 150 slip-on flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 88.9 mm (3.5″) | 9.7 mm (0.38″) | 35.1 mm (1.38″) | 60.5 mm (2.38″) | 4 × Ø15.9 mm (0.63″) | 30.2 mm (1.19″) | 14.2 mm (0.56″) | 0.5 kg | Details → |
| 3/4″ | 20 | 98.6 mm (3.88″) | 11.2 mm (0.44″) | 42.9 mm (1.69″) | 69.9 mm (2.75″) | 4 × Ø15.9 mm (0.63″) | 38.1 mm (1.5″) | 14.2 mm (0.56″) | 0.9 kg | Details → |
| 1″ | 25 | 108 mm (4.25″) | 12.7 mm (0.5″) | 50.8 mm (2″) | 79.2 mm (3.12″) | 4 × Ø15.9 mm (0.63″) | 49.3 mm (1.94″) | 15.7 mm (0.62″) | 0.9 kg | Details → |
| 1¼″ | 32 | 117.3 mm (4.62″) | 14.2 mm (0.56″) | 63.5 mm (2.5″) | 88.9 mm (3.5″) | 4 × Ø15.9 mm (0.63″) | 58.7 mm (2.31″) | 19.1 mm (0.75″) | 1.4 kg | Details → |
| 1½″ | 40 | 127 mm (5″) | 15.7 mm (0.62″) | 73.2 mm (2.88″) | 98.6 mm (3.88″) | 4 × Ø15.9 mm (0.63″) | 65 mm (2.56″) | 20.6 mm (0.81″) | 1.4 kg | Details → |
| 2″ | 50 | 152.4 mm (6″) | 17.5 mm (0.69″) | 91.9 mm (3.62″) | 120.7 mm (4.75″) | 4 × Ø19.1 mm (0.75″) | 77.7 mm (3.06″) | 23.9 mm (0.94″) | 2.3 kg | Details → |
| 2½″ | 65 | 177.8 mm (7″) | 20.6 mm (0.81″) | 104.6 mm (4.12″) | 139.7 mm (5.5″) | 4 × Ø19.1 mm (0.75″) | 90.4 mm (3.56″) | 26.9 mm (1.06″) | 3.2 kg | Details → |
| 3″ | 80 | 190.5 mm (7.5″) | 22.4 mm (0.88″) | 127 mm (5″) | 152.4 mm (6″) | 4 × Ø19.1 mm (0.75″) | 108 mm (4.25″) | 28.4 mm (1.12″) | 3.6 kg | Details → |
| 3½″ | 90 | 215.9 mm (8.5″) | 22.4 mm (0.88″) | 139.7 mm (5.5″) | 177.8 mm (7″) | 8 × Ø19.1 mm (0.75″) | 122.2 mm (4.81″) | 30.2 mm (1.19″) | 5 kg | Details → |
| 4″ | 100 | 228.6 mm (9″) | 22.4 mm (0.88″) | 157.2 mm (6.19″) | 190.5 mm (7.5″) | 8 × Ø19.1 mm (0.75″) | 134.9 mm (5.31″) | 31.8 mm (1.25″) | 5.9 kg | Details → |
| 5″ | 125 | 254 mm (10″) | 22.4 mm (0.88″) | 185.7 mm (7.31″) | 215.9 mm (8.5″) | 8 × Ø22.2 mm (0.87″) | 163.6 mm (6.44″) | 35.1 mm (1.38″) | 6.8 kg | Details → |
| 6″ | 150 | 279.4 mm (11″) | 23.9 mm (0.94″) | 215.9 mm (8.5″) | 241.3 mm (9.5″) | 8 × Ø22.2 mm (0.87″) | 192 mm (7.56″) | 38.1 mm (1.5″) | 8.6 kg | Details → |
| 8″ | 200 | 342.9 mm (13.5″) | 26.9 mm (1.06″) | 269.7 mm (10.62″) | 298.5 mm (11.75″) | 8 × Ø22.2 mm (0.87″) | 246.1 mm (9.69″) | 42.9 mm (1.69″) | 13.6 kg | Details → |
| 10″ | 250 | 406.4 mm (16″) | 28.4 mm (1.12″) | 323.9 mm (12.75″) | 362 mm (14.25″) | 12 × Ø25.4 mm (1″) | 304.8 mm (12″) | 47.8 mm (1.88″) | 19.5 kg | Details → |
| 12″ | 300 | 482.6 mm (19″) | 30.2 mm (1.19″) | 381 mm (15″) | 431.8 mm (17″) | 12 × Ø25.4 mm (1″) | 365.3 mm (14.38″) | 53.8 mm (2.12″) | 29 kg | Details → |
| 14″ | 350 | 533.4 mm (21″) | 33.3 mm (1.31″) | 412.8 mm (16.25″) | 476.3 mm (18.75″) | 12 × Ø28.6 mm (1.13″) | 400.1 mm (15.75″) | 55.6 mm (2.19″) | 40.8 kg | Details → |
| 16″ | 400 | 596.9 mm (23.5″) | 35.1 mm (1.38″) | 469.9 mm (18.5″) | 539.8 mm (21.25″) | 16 × Ø28.6 mm (1.13″) | 457.2 mm (18″) | 62 mm (2.44″) | 44.5 kg | Details → |
| 18″ | 450 | 635 mm (25″) | 38.1 mm (1.5″) | 533.4 mm (21″) | 577.9 mm (22.75″) | 16 × Ø31.8 mm (1.25″) | 505 mm (19.88″) | 66.5 mm (2.62″) | 59 kg | Details → |
| 20″ | 500 | 698.5 mm (27.5″) | 41.1 mm (1.62″) | 584.2 mm (23″) | 635 mm (25″) | 20 × Ø31.8 mm (1.25″) | 558.8 mm (22″) | 71.4 mm (2.81″) | 74.8 kg | Details → |
| 22″ | 550 | 749.3 mm (29.5″) | 44.5 mm (1.75″) | 641.4 mm (25.25″) | 692.2 mm (27.25″) | 20 × Ø28.6 mm (1.13″) | 609.6 mm (24″) | 77.7 mm (3.06″) | — | Details → |
| 24″ | 600 | 812.8 mm (32″) | 46 mm (1.81″) | 692.2 mm (27.25″) | 749.3 mm (29.5″) | 20 × Ø34.9 mm (1.37″) | 663.4 mm (26.12″) | 81 mm (3.19″) | 99.8 kg | Details → |
21 sizes · ASME B16.5 Class 150 · ASME B16.5-2025
ASME B16.5 Class 300 slip-on flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 12.7 mm (0.5″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 38.1 mm (1.5″) | 20.6 mm (0.81″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 14.2 mm (0.56″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 47.8 mm (1.88″) | 23.9 mm (0.94″) | 1.4 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 15.7 mm (0.62″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 53.8 mm (2.12″) | 25.4 mm (1″) | 1.4 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 17.5 mm (0.69″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 63.5 mm (2.5″) | 25.4 mm (1″) | 1.8 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 19.1 mm (0.75″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 69.9 mm (2.75″) | 28.7 mm (1.13″) | 2.7 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 20.6 mm (0.81″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 84.1 mm (3.31″) | 31.8 mm (1.25″) | 3.2 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 23.9 mm (0.94″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 100.1 mm (3.94″) | 36.6 mm (1.44″) | 4.5 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 26.9 mm (1.06″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 117.3 mm (4.62″) | 41.4 mm (1.63″) | 5.9 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 28.4 mm (1.12″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø22.2 mm (0.87″) | 133.4 mm (5.25″) | 42.9 mm (1.69″) | 7.7 kg | Details → |
| 4″ | 100 | 254 mm (10″) | 30.2 mm (1.19″) | 157.2 mm (6.19″) | 200.2 mm (7.88″) | 8 × Ø22.2 mm (0.87″) | 146.1 mm (5.75″) | 46.2 mm (1.82″) | 10 kg | Details → |
| 5″ | 125 | 279.4 mm (11″) | 33.3 mm (1.31″) | 185.7 mm (7.31″) | 235 mm (9.25″) | 8 × Ø22.2 mm (0.87″) | 177.8 mm (7″) | 49.3 mm (1.94″) | 12.7 kg | Details → |
| 6″ | 150 | 317.5 mm (12.5″) | 35.1 mm (1.38″) | 215.9 mm (8.5″) | 269.7 mm (10.62″) | 12 × Ø22.2 mm (0.87″) | 206.2 mm (8.12″) | 50.8 mm (2″) | 17.7 kg | Details → |
| 8″ | 200 | 381 mm (15″) | 39.6 mm (1.56″) | 269.7 mm (10.62″) | 330.2 mm (13″) | 12 × Ø25.4 mm (1″) | 260.4 mm (10.25″) | 60.5 mm (2.38″) | 26.3 kg | Details → |
| 10″ | 250 | 444.5 mm (17.5″) | 46 mm (1.81″) | 323.9 mm (12.75″) | 387.4 mm (15.25″) | 16 × Ø28.6 mm (1.13″) | 320.5 mm (12.62″) | 65 mm (2.56″) | 36.7 kg | Details → |
| 12″ | 300 | 520.7 mm (20.5″) | 49.3 mm (1.94″) | 381 mm (15″) | 450.9 mm (17.75″) | 16 × Ø31.8 mm (1.25″) | 374.7 mm (14.75″) | 71.6 mm (2.82″) | 52.2 kg | Details → |
| 14″ | 350 | 584.2 mm (23″) | 52.3 mm (2.06″) | 412.8 mm (16.25″) | 514.4 mm (20.25″) | 20 × Ø31.8 mm (1.25″) | 425.5 mm (16.75″) | 74.7 mm (2.94″) | 74.8 kg | Details → |
| 16″ | 400 | 647.7 mm (25.5″) | 55.6 mm (2.19″) | 469.9 mm (18.5″) | 571.5 mm (22.5″) | 20 × Ø34.9 mm (1.37″) | 482.6 mm (19″) | 81 mm (3.19″) | 86.2 kg | Details → |
| 18″ | 450 | 711.2 mm (28″) | 58.7 mm (2.31″) | 533.4 mm (21″) | 628.7 mm (24.75″) | 24 × Ø34.9 mm (1.37″) | 533.4 mm (21″) | 87.4 mm (3.44″) | 113 kg | Details → |
| 20″ | 500 | 774.7 mm (30.5″) | 62 mm (2.44″) | 584.2 mm (23″) | 685.8 mm (27″) | 24 × Ø34.9 mm (1.37″) | 587.2 mm (23.12″) | 93.7 mm (3.69″) | 143 kg | Details → |
| 22″ | 550 | 838.2 mm (33″) | 65 mm (2.56″) | 641.4 mm (25.25″) | 743 mm (29.25″) | 24 × Ø41.3 mm (1.63″) | 641.4 mm (25.25″) | 100.1 mm (3.94″) | — | Details → |
| 24″ | 600 | 914.4 mm (36″) | 68.3 mm (2.69″) | 692.2 mm (27.25″) | 812.8 mm (32″) | 24 × Ø41.3 mm (1.63″) | 701.5 mm (27.62″) | 104.9 mm (4.13″) | 215 kg | Details → |
21 sizes · ASME B16.5 Class 300 · ASME B16.5-2025
ASME B16.5 Class 400 slip-on flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 14.2 mm (0.56″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 38.1 mm (1.5″) | 22.4 mm (0.88″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 15.7 mm (0.62″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 47.8 mm (1.88″) | 25.4 mm (1″) | 1.4 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 17.5 mm (0.69″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 53.8 mm (2.12″) | 26.9 mm (1.06″) | 1.8 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 20.6 mm (0.81″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 63.5 mm (2.5″) | 28.4 mm (1.12″) | 2.3 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 22.4 mm (0.88″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 69.9 mm (2.75″) | 31.8 mm (1.25″) | 3.2 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 25.4 mm (1″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 84.1 mm (3.31″) | 36.6 mm (1.44″) | 4.1 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 28.4 mm (1.12″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 100.1 mm (3.94″) | 41.1 mm (1.62″) | 5.9 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 31.8 mm (1.25″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 117.3 mm (4.62″) | 46 mm (1.81″) | 7.3 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 35.1 mm (1.38″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø25.4 mm (1″) | 133.4 mm (5.25″) | 49.3 mm (1.94″) | 9.5 kg | Details → |
| 4″ | 100 | 254 mm (10″) | 35.1 mm (1.38″) | 157.2 mm (6.19″) | 200.2 mm (7.88″) | 8 × Ø25.4 mm (1″) | 146.1 mm (5.75″) | 50.8 mm (2″) | 11.8 kg | Details → |
| 5″ | 125 | 279.4 mm (11″) | 38.1 mm (1.5″) | 185.7 mm (7.31″) | 235 mm (9.25″) | 8 × Ø25.4 mm (1″) | 177.8 mm (7″) | 53.8 mm (2.12″) | 14.1 kg | Details → |
| 6″ | 150 | 317.5 mm (12.5″) | 41.1 mm (1.62″) | 215.9 mm (8.5″) | 269.7 mm (10.62″) | 12 × Ø25.4 mm (1″) | 206.2 mm (8.12″) | 57.2 mm (2.25″) | 20 kg | Details → |
| 8″ | 200 | 381 mm (15″) | 47.8 mm (1.88″) | 269.7 mm (10.62″) | 330.2 mm (13″) | 12 × Ø28.6 mm (1.13″) | 260.4 mm (10.25″) | 68.3 mm (2.69″) | 30.4 kg | Details → |
| 10″ | 250 | 444.5 mm (17.5″) | 53.8 mm (2.12″) | 323.9 mm (12.75″) | 387.4 mm (15.25″) | 16 × Ø31.8 mm (1.25″) | 320.5 mm (12.62″) | 73.2 mm (2.88″) | 41.3 kg | Details → |
| 12″ | 300 | 520.7 mm (20.5″) | 57.2 mm (2.25″) | 381 mm (15″) | 450.9 mm (17.75″) | 16 × Ø34.9 mm (1.37″) | 374.7 mm (14.75″) | 79.2 mm (3.12″) | 59 kg | Details → |
| 14″ | 350 | 584.2 mm (23″) | 60.5 mm (2.38″) | 412.8 mm (16.25″) | 514.4 mm (20.25″) | 20 × Ø34.9 mm (1.37″) | 425.5 mm (16.75″) | 84.1 mm (3.31″) | 81.6 kg | Details → |
| 16″ | 400 | 647.7 mm (25.5″) | 63.5 mm (2.5″) | 469.9 mm (18.5″) | 571.5 mm (22.5″) | 20 × Ø38.1 mm (1.5″) | 482.6 mm (19″) | 93.7 mm (3.69″) | 107 kg | Details → |
| 18″ | 450 | 711.2 mm (28″) | 66.5 mm (2.62″) | 533.4 mm (21″) | 628.7 mm (24.75″) | 24 × Ø38.1 mm (1.5″) | 533.4 mm (21″) | 98.6 mm (3.88″) | 129 kg | Details → |
| 20″ | 500 | 774.7 mm (30.5″) | 69.9 mm (2.75″) | 584.2 mm (23″) | 685.8 mm (27″) | 24 × Ø41.3 mm (1.63″) | 587.2 mm (23.12″) | 101.6 mm (4″) | 156 kg | Details → |
| 22″ | 550 | 838.2 mm (33″) | 73.2 mm (2.88″) | 641.4 mm (25.25″) | 743 mm (29.25″) | 24 × Ø44.5 mm (1.75″) | 641.4 mm (25.25″) | 108 mm (4.25″) | — | Details → |
| 24″ | 600 | 914.4 mm (36″) | 76.2 mm (3″) | 692.2 mm (27.25″) | 812.8 mm (32″) | 24 × Ø47.6 mm (1.87″) | 701.5 mm (27.62″) | 114.3 mm (4.5″) | 231 kg | Details → |
21 sizes · ASME B16.5 Class 400 · ASME B16.5-2025
ASME B16.5 Class 600 slip-on flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 14.2 mm (0.56″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 38.1 mm (1.5″) | 22.4 mm (0.88″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 15.7 mm (0.62″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 47.8 mm (1.88″) | 25.4 mm (1″) | 1.4 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 17.5 mm (0.69″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 53.8 mm (2.12″) | 26.9 mm (1.06″) | 1.8 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 20.6 mm (0.81″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 63.5 mm (2.5″) | 28.4 mm (1.12″) | 2.3 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 22.4 mm (0.88″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 69.9 mm (2.75″) | 31.8 mm (1.25″) | 3.2 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 25.4 mm (1″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 84.1 mm (3.31″) | 36.6 mm (1.44″) | 4.1 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 28.4 mm (1.12″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 100.1 mm (3.94″) | 41.1 mm (1.62″) | 5.9 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 31.8 mm (1.25″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 117.3 mm (4.62″) | 46 mm (1.81″) | 7.3 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 35.1 mm (1.38″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø25.4 mm (1″) | 133.4 mm (5.25″) | 49.3 mm (1.94″) | 9.5 kg | Details → |
| 4″ | 100 | 273.1 mm (10.75″) | 38.1 mm (1.5″) | 157.2 mm (6.19″) | 215.9 mm (8.5″) | 8 × Ø25.4 mm (1″) | 152.4 mm (6″) | 53.8 mm (2.12″) | 16.8 kg | Details → |
| 5″ | 125 | 330.2 mm (13″) | 44.5 mm (1.75″) | 185.7 mm (7.31″) | 266.7 mm (10.5″) | 8 × Ø28.6 mm (1.13″) | 189 mm (7.44″) | 60.5 mm (2.38″) | 28.6 kg | Details → |
| 6″ | 150 | 355.6 mm (14″) | 47.8 mm (1.88″) | 215.9 mm (8.5″) | 292.1 mm (11.5″) | 12 × Ø28.6 mm (1.13″) | 222.3 mm (8.75″) | 66.5 mm (2.62″) | 36.3 kg | Details → |
| 8″ | 200 | 419.1 mm (16.5″) | 55.6 mm (2.19″) | 269.7 mm (10.62″) | 349.3 mm (13.75″) | 12 × Ø31.8 mm (1.25″) | 273.1 mm (10.75″) | 76.2 mm (3″) | 52.2 kg | Details → |
| 10″ | 250 | 508 mm (20″) | 63.5 mm (2.5″) | 323.9 mm (12.75″) | 431.8 mm (17″) | 16 × Ø34.9 mm (1.37″) | 342.9 mm (13.5″) | 85.9 mm (3.38″) | 77.1 kg | Details → |
| 12″ | 300 | 558.8 mm (22″) | 66.5 mm (2.62″) | 381 mm (15″) | 489 mm (19.25″) | 20 × Ø34.9 mm (1.37″) | 400.1 mm (15.75″) | 91.9 mm (3.62″) | 90.7 kg | Details → |
| 14″ | 350 | 603.3 mm (23.75″) | 69.9 mm (2.75″) | 412.8 mm (16.25″) | 527.1 mm (20.75″) | 20 × Ø38.1 mm (1.5″) | 431.8 mm (17″) | 93.7 mm (3.69″) | 104 kg | Details → |
| 16″ | 400 | 685.8 mm (27″) | 76.2 mm (3″) | 469.9 mm (18.5″) | 603.3 mm (23.75″) | 20 × Ø41.3 mm (1.63″) | 495.3 mm (19.5″) | 106.4 mm (4.19″) | 150 kg | Details → |
| 18″ | 450 | 743 mm (29.25″) | 82.6 mm (3.25″) | 533.4 mm (21″) | 654.1 mm (25.75″) | 20 × Ø44.5 mm (1.75″) | 546.1 mm (21.5″) | 117.3 mm (4.62″) | 181 kg | Details → |
| 20″ | 500 | 812.8 mm (32″) | 88.9 mm (3.5″) | 584.2 mm (23″) | 723.9 mm (28.5″) | 24 × Ø44.5 mm (1.75″) | 609.6 mm (24″) | 127 mm (5″) | 231 kg | Details → |
| 22″ | 550 | 870 mm (34.25″) | 95.3 mm (3.75″) | 641.4 mm (25.25″) | 777.7 mm (30.62″) | 24 × Ø47.6 mm (1.87″) | 666.8 mm (26.25″) | 133.4 mm (5.25″) | — | Details → |
| 24″ | 600 | 939.8 mm (37″) | 101.6 mm (4″) | 692.2 mm (27.25″) | 838.2 mm (33″) | 24 × Ø50.8 mm (2″) | 717.6 mm (28.25″) | 139.7 mm (5.5″) | 331 kg | Details → |
21 sizes · ASME B16.5 Class 600 · ASME B16.5-2025
ASME B16.5 Class 900 slip-on flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 120.7 mm (4.75″) | 22.4 mm (0.88″) | 35.1 mm (1.38″) | 82.6 mm (3.25″) | 4 × Ø22.2 mm (0.87″) | 38.1 mm (1.5″) | 31.8 mm (1.25″) | 1.8 kg | Details → |
| 3/4″ | 20 | 130 mm (5.12″) | 25.4 mm (1″) | 42.9 mm (1.69″) | 88.9 mm (3.5″) | 4 × Ø22.2 mm (0.87″) | 44.5 mm (1.75″) | 35.1 mm (1.38″) | 2.3 kg | Details → |
| 1″ | 25 | 149.4 mm (5.88″) | 28.4 mm (1.12″) | 50.8 mm (2″) | 101.6 mm (4″) | 4 × Ø25.4 mm (1″) | 52.3 mm (2.06″) | 41.1 mm (1.62″) | 3.6 kg | Details → |
| 1¼″ | 32 | 158.8 mm (6.25″) | 28.4 mm (1.12″) | 63.5 mm (2.5″) | 111.3 mm (4.38″) | 4 × Ø25.4 mm (1″) | 63.5 mm (2.5″) | 41.1 mm (1.62″) | 4.1 kg | Details → |
| 1½″ | 40 | 177.8 mm (7″) | 31.8 mm (1.25″) | 73.2 mm (2.88″) | 124 mm (4.88″) | 4 × Ø28.6 mm (1.13″) | 69.9 mm (2.75″) | 44.5 mm (1.75″) | 5.4 kg | Details → |
| 2″ | 50 | 215.9 mm (8.5″) | 38.1 mm (1.5″) | 91.9 mm (3.62″) | 165.1 mm (6.5″) | 8 × Ø25.4 mm (1″) | 104.6 mm (4.12″) | 57.2 mm (2.25″) | 11.3 kg | Details → |
| 2½″ | 65 | 244.3 mm (9.62″) | 41.1 mm (1.62″) | 104.6 mm (4.12″) | 190.5 mm (7.5″) | 8 × Ø28.6 mm (1.13″) | 124 mm (4.88″) | 63.5 mm (2.5″) | 16.3 kg | Details → |
| 3″ | 80 | 241.3 mm (9.5″) | 38.1 mm (1.5″) | 127 mm (5″) | 190.5 mm (7.5″) | 8 × Ø25.4 mm (1″) | 127 mm (5″) | 53.8 mm (2.12″) | 11.8 kg | Details → |
| 4″ | 100 | 292.1 mm (11.5″) | 44.5 mm (1.75″) | 157.2 mm (6.19″) | 235 mm (9.25″) | 8 × Ø31.8 mm (1.25″) | 158.8 mm (6.25″) | 69.9 mm (2.75″) | 24 kg | Details → |
| 5″ | 125 | 349.3 mm (13.75″) | 50.8 mm (2″) | 185.7 mm (7.31″) | 279.4 mm (11″) | 8 × Ø34.9 mm (1.37″) | 190.5 mm (7.5″) | 79.2 mm (3.12″) | 37.6 kg | Details → |
| 6″ | 150 | 381 mm (15″) | 55.6 mm (2.19″) | 215.9 mm (8.5″) | 317.5 mm (12.5″) | 12 × Ø31.8 mm (1.25″) | 235 mm (9.25″) | 85.9 mm (3.38″) | 49.9 kg | Details → |
| 8″ | 200 | 469.9 mm (18.5″) | 63.5 mm (2.5″) | 269.7 mm (10.62″) | 393.7 mm (15.5″) | 12 × Ø38.1 mm (1.5″) | 298.5 mm (11.75″) | 101.6 mm (4″) | 77.1 kg | Details → |
| 10″ | 250 | 546.1 mm (21.5″) | 69.9 mm (2.75″) | 323.9 mm (12.75″) | 469.9 mm (18.5″) | 16 × Ø38.1 mm (1.5″) | 368.3 mm (14.5″) | 108 mm (4.25″) | 111 kg | Details → |
| 12″ | 300 | 609.6 mm (24″) | 79.2 mm (3.12″) | 381 mm (15″) | 533.4 mm (21″) | 20 × Ø38.1 mm (1.5″) | 419.1 mm (16.5″) | 117.3 mm (4.62″) | 147 kg | Details → |
| 14″ | 350 | 641.4 mm (25.25″) | 85.9 mm (3.38″) | 412.8 mm (16.25″) | 558.8 mm (22″) | 20 × Ø41.3 mm (1.63″) | 450.9 mm (17.75″) | 130 mm (5.12″) | 181 kg | Details → |
| 16″ | 400 | 704.9 mm (27.75″) | 88.9 mm (3.5″) | 469.9 mm (18.5″) | 616 mm (24.25″) | 20 × Ø44.5 mm (1.75″) | 508 mm (20″) | 133.4 mm (5.25″) | 193 kg | Details → |
| 18″ | 450 | 787.4 mm (31″) | 101.6 mm (4″) | 533.4 mm (21″) | 685.8 mm (27″) | 20 × Ø50.8 mm (2″) | 565.2 mm (22.25″) | 152.4 mm (6″) | 272 kg | Details → |
| 20″ | 500 | 857.3 mm (33.75″) | 108 mm (4.25″) | 584.2 mm (23″) | 749.3 mm (29.5″) | 20 × Ø54 mm (2.13″) | 622.3 mm (24.5″) | 158.8 mm (6.25″) | 331 kg | Details → |
| 24″ | 600 | 1041.4 mm (41″) | 139.7 mm (5.5″) | 692.2 mm (27.25″) | 901.7 mm (35.5″) | 20 × Ø66.7 mm (2.63″) | 749.3 mm (29.5″) | 203.2 mm (8″) | 635 kg | Details → |
19 sizes · ASME B16.5 Class 900 · ASME B16.5-2025
ASME B16.5 Class 1500 slip-on flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Hub Ø | Length | Weight | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 120.7 mm (4.75″) | 22.4 mm (0.88″) | 35.1 mm (1.38″) | 82.6 mm (3.25″) | 4 × Ø22.2 mm (0.87″) | 38.1 mm (1.5″) | 31.8 mm (1.25″) | 1.8 kg | Details → |
| 3/4″ | 20 | 130 mm (5.12″) | 25.4 mm (1″) | 42.9 mm (1.69″) | 88.9 mm (3.5″) | 4 × Ø22.2 mm (0.87″) | 44.5 mm (1.75″) | 35.1 mm (1.38″) | 2.3 kg | Details → |
| 1″ | 25 | 149.4 mm (5.88″) | 28.4 mm (1.12″) | 50.8 mm (2″) | 101.6 mm (4″) | 4 × Ø25.4 mm (1″) | 52.3 mm (2.06″) | 41.1 mm (1.62″) | 3.6 kg | Details → |
| 1¼″ | 32 | 158.8 mm (6.25″) | 28.4 mm (1.12″) | 63.5 mm (2.5″) | 111.3 mm (4.38″) | 4 × Ø25.4 mm (1″) | 63.5 mm (2.5″) | 41.1 mm (1.62″) | 4.1 kg | Details → |
| 1½″ | 40 | 177.8 mm (7″) | 31.8 mm (1.25″) | 73.2 mm (2.88″) | 124 mm (4.88″) | 4 × Ø28.6 mm (1.13″) | 69.9 mm (2.75″) | 44.5 mm (1.75″) | 5.4 kg | Details → |
| 2″ | 50 | 215.9 mm (8.5″) | 38.1 mm (1.5″) | 91.9 mm (3.62″) | 165.1 mm (6.5″) | 8 × Ø25.4 mm (1″) | 104.6 mm (4.12″) | 57.2 mm (2.25″) | 11.3 kg | Details → |
| 2½″ | 65 | 244.3 mm (9.62″) | 41.1 mm (1.62″) | 104.6 mm (4.12″) | 190.5 mm (7.5″) | 8 × Ø28.6 mm (1.13″) | 124 mm (4.88″) | 63.5 mm (2.5″) | 16.3 kg | Details → |
7 sizes · ASME B16.5 Class 1500 · ASME B16.5-2025
Blind Flanges — ASME B16.5
Blind product page →Solid disc bolted over a line end or vessel opening; used for isolation, test points and future tie-ins.
ASME B16.5 Class 150 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 88.9 mm (3.5″) | 11.2 mm (0.44″) | 35.1 mm (1.38″) | 60.5 mm (2.38″) | 4 × Ø15.9 mm (0.63″) | 0.5 kg | Details → |
| 3/4″ | 20 | 98.6 mm (3.88″) | 12.7 mm (0.5″) | 42.9 mm (1.69″) | 69.9 mm (2.75″) | 4 × Ø15.9 mm (0.63″) | 0.9 kg | Details → |
| 1″ | 25 | 108 mm (4.25″) | 14.2 mm (0.56″) | 50.8 mm (2″) | 79.2 mm (3.12″) | 4 × Ø15.9 mm (0.63″) | 0.9 kg | Details → |
| 1¼″ | 32 | 117.3 mm (4.62″) | 15.7 mm (0.62″) | 63.5 mm (2.5″) | 88.9 mm (3.5″) | 4 × Ø15.9 mm (0.63″) | 1.4 kg | Details → |
| 1½″ | 40 | 127 mm (5″) | 17.5 mm (0.69″) | 73.2 mm (2.88″) | 98.6 mm (3.88″) | 4 × Ø15.9 mm (0.63″) | 1.8 kg | Details → |
| 2″ | 50 | 152.4 mm (6″) | 19.1 mm (0.75″) | 91.9 mm (3.62″) | 120.7 mm (4.75″) | 4 × Ø19.1 mm (0.75″) | 2.3 kg | Details → |
| 2½″ | 65 | 177.8 mm (7″) | 22.4 mm (0.88″) | 104.6 mm (4.12″) | 139.7 mm (5.5″) | 4 × Ø19.1 mm (0.75″) | 3.2 kg | Details → |
| 3″ | 80 | 190.5 mm (7.5″) | 23.9 mm (0.94″) | 127 mm (5″) | 152.4 mm (6″) | 4 × Ø19.1 mm (0.75″) | 4.1 kg | Details → |
| 3½″ | 90 | 215.9 mm (8.5″) | 23.9 mm (0.94″) | 139.7 mm (5.5″) | 177.8 mm (7″) | 8 × Ø19.1 mm (0.75″) | 5.9 kg | Details → |
| 4″ | 100 | 228.6 mm (9″) | 23.9 mm (0.94″) | 157.2 mm (6.19″) | 190.5 mm (7.5″) | 8 × Ø19.1 mm (0.75″) | 7.7 kg | Details → |
| 5″ | 125 | 254 mm (10″) | 23.9 mm (0.94″) | 185.7 mm (7.31″) | 215.9 mm (8.5″) | 8 × Ø22.2 mm (0.87″) | 9.1 kg | Details → |
| 6″ | 150 | 279.4 mm (11″) | 25.4 mm (1″) | 215.9 mm (8.5″) | 241.3 mm (9.5″) | 8 × Ø22.2 mm (0.87″) | 11.8 kg | Details → |
| 8″ | 200 | 342.9 mm (13.5″) | 28.4 mm (1.12″) | 269.7 mm (10.62″) | 298.5 mm (11.75″) | 8 × Ø22.2 mm (0.87″) | 20.4 kg | Details → |
| 10″ | 250 | 406.4 mm (16″) | 30.2 mm (1.19″) | 323.9 mm (12.75″) | 362 mm (14.25″) | 12 × Ø25.4 mm (1″) | 31.8 kg | Details → |
| 12″ | 300 | 482.6 mm (19″) | 31.8 mm (1.25″) | 381 mm (15″) | 431.8 mm (17″) | 12 × Ø25.4 mm (1″) | 49.9 kg | Details → |
| 14″ | 350 | 533.4 mm (21″) | 35.1 mm (1.38″) | 412.8 mm (16.25″) | 476.3 mm (18.75″) | 12 × Ø28.6 mm (1.13″) | 63.5 kg | Details → |
| 16″ | 400 | 596.9 mm (23.5″) | 36.6 mm (1.44″) | 469.9 mm (18.5″) | 539.8 mm (21.25″) | 16 × Ø28.6 mm (1.13″) | 81.6 kg | Details → |
| 18″ | 450 | 635 mm (25″) | 39.6 mm (1.56″) | 533.4 mm (21″) | 577.9 mm (22.75″) | 16 × Ø31.8 mm (1.25″) | 99.8 kg | Details → |
| 20″ | 500 | 698.5 mm (27.5″) | 42.9 mm (1.69″) | 584.2 mm (23″) | 635 mm (25″) | 20 × Ø31.8 mm (1.25″) | 129 kg | Details → |
| 22″ | 550 | 749.3 mm (29.5″) | 46 mm (1.81″) | 641.4 mm (25.25″) | 692.2 mm (27.25″) | 20 × Ø28.6 mm (1.13″) | — | Details → |
| 24″ | 600 | 812.8 mm (32″) | 47.8 mm (1.88″) | 692.2 mm (27.25″) | 749.3 mm (29.5″) | 20 × Ø34.9 mm (1.37″) | 195 kg | Details → |
21 sizes · ASME B16.5 Class 150 · ASME B16.5-2025
ASME B16.5 Class 300 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 14.2 mm (0.56″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 15.7 mm (0.62″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 1.4 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 17.5 mm (0.69″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 1.4 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 19.1 mm (0.75″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 1.8 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 20.6 mm (0.81″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 2.7 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 22.4 mm (0.88″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 3.6 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 25.4 mm (1″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 5.4 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 28.4 mm (1.12″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 7.3 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 30.2 mm (1.19″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø22.2 mm (0.87″) | 9.5 kg | Details → |
| 4″ | 100 | 254 mm (10″) | 31.8 mm (1.25″) | 157.2 mm (6.19″) | 200.2 mm (7.88″) | 8 × Ø22.2 mm (0.87″) | 12.2 kg | Details → |
| 5″ | 125 | 279.4 mm (11″) | 35.1 mm (1.38″) | 185.7 mm (7.31″) | 235 mm (9.25″) | 8 × Ø22.2 mm (0.87″) | 15.9 kg | Details → |
| 6″ | 150 | 317.5 mm (12.5″) | 36.6 mm (1.44″) | 215.9 mm (8.5″) | 269.7 mm (10.62″) | 12 × Ø22.2 mm (0.87″) | 22.7 kg | Details → |
| 8″ | 200 | 381 mm (15″) | 41.1 mm (1.62″) | 269.7 mm (10.62″) | 330.2 mm (13″) | 12 × Ø25.4 mm (1″) | 36.7 kg | Details → |
| 10″ | 250 | 444.5 mm (17.5″) | 47.8 mm (1.88″) | 323.9 mm (12.75″) | 387.4 mm (15.25″) | 16 × Ø28.6 mm (1.13″) | 56.2 kg | Details → |
| 12″ | 300 | 520.7 mm (20.5″) | 50.8 mm (2″) | 381 mm (15″) | 450.9 mm (17.75″) | 16 × Ø31.8 mm (1.25″) | 83.9 kg | Details → |
| 14″ | 350 | 584.2 mm (23″) | 53.8 mm (2.12″) | 412.8 mm (16.25″) | 514.4 mm (20.25″) | 20 × Ø31.8 mm (1.25″) | 113 kg | Details → |
| 16″ | 400 | 647.7 mm (25.5″) | 57.2 mm (2.25″) | 469.9 mm (18.5″) | 571.5 mm (22.5″) | 20 × Ø34.9 mm (1.37″) | 134 kg | Details → |
| 18″ | 450 | 711.2 mm (28″) | 60.5 mm (2.38″) | 533.4 mm (21″) | 628.7 mm (24.75″) | 24 × Ø34.9 mm (1.37″) | 179 kg | Details → |
| 20″ | 500 | 774.7 mm (30.5″) | 63.5 mm (2.5″) | 584.2 mm (23″) | 685.8 mm (27″) | 24 × Ø34.9 mm (1.37″) | 229 kg | Details → |
| 22″ | 550 | 838.2 mm (33″) | 66.5 mm (2.62″) | 641.4 mm (25.25″) | 743 mm (29.25″) | 24 × Ø41.3 mm (1.63″) | — | Details → |
| 24″ | 600 | 914.4 mm (36″) | 69.9 mm (2.75″) | 692.2 mm (27.25″) | 812.8 mm (32″) | 24 × Ø41.3 mm (1.63″) | 358 kg | Details → |
21 sizes · ASME B16.5 Class 300 · ASME B16.5-2025
ASME B16.5 Class 400 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 14.2 mm (0.56″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 15.7 mm (0.62″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 1.4 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 17.5 mm (0.69″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 1.8 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 20.6 mm (0.81″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 2.3 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 22.4 mm (0.88″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 3.6 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 25.4 mm (1″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 4.5 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 28.4 mm (1.12″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 6.8 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 31.8 mm (1.25″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 9.1 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 35.1 mm (1.38″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø25.4 mm (1″) | 13.2 kg | Details → |
| 4″ | 100 | 254 mm (10″) | 35.1 mm (1.38″) | 157.2 mm (6.19″) | 200.2 mm (7.88″) | 8 × Ø25.4 mm (1″) | 15 kg | Details → |
| 5″ | 125 | 279.4 mm (11″) | 38.1 mm (1.5″) | 185.7 mm (7.31″) | 235 mm (9.25″) | 8 × Ø25.4 mm (1″) | 20 kg | Details → |
| 6″ | 150 | 317.5 mm (12.5″) | 41.1 mm (1.62″) | 215.9 mm (8.5″) | 269.7 mm (10.62″) | 12 × Ø25.4 mm (1″) | 27.7 kg | Details → |
| 8″ | 200 | 381 mm (15″) | 47.8 mm (1.88″) | 269.7 mm (10.62″) | 330.2 mm (13″) | 12 × Ø28.6 mm (1.13″) | 45.4 kg | Details → |
| 10″ | 250 | 444.5 mm (17.5″) | 53.8 mm (2.12″) | 323.9 mm (12.75″) | 387.4 mm (15.25″) | 16 × Ø31.8 mm (1.25″) | 70.3 kg | Details → |
| 12″ | 300 | 520.7 mm (20.5″) | 57.2 mm (2.25″) | 381 mm (15″) | 450.9 mm (17.75″) | 16 × Ø34.9 mm (1.37″) | 102 kg | Details → |
| 14″ | 350 | 584.2 mm (23″) | 60.5 mm (2.38″) | 412.8 mm (16.25″) | 514.4 mm (20.25″) | 20 × Ø34.9 mm (1.37″) | 132 kg | Details → |
| 16″ | 400 | 647.7 mm (25.5″) | 63.5 mm (2.5″) | 469.9 mm (18.5″) | 571.5 mm (22.5″) | 20 × Ø38.1 mm (1.5″) | 168 kg | Details → |
| 18″ | 450 | 711.2 mm (28″) | 66.5 mm (2.62″) | 533.4 mm (21″) | 628.7 mm (24.75″) | 24 × Ø38.1 mm (1.5″) | 206 kg | Details → |
| 20″ | 500 | 774.7 mm (30.5″) | 69.9 mm (2.75″) | 584.2 mm (23″) | 685.8 mm (27″) | 24 × Ø41.3 mm (1.63″) | 266 kg | Details → |
| 22″ | 550 | 838.2 mm (33″) | 73.2 mm (2.88″) | 641.4 mm (25.25″) | 743 mm (29.25″) | 24 × Ø44.5 mm (1.75″) | — | Details → |
| 24″ | 600 | 914.4 mm (36″) | 76.2 mm (3″) | 692.2 mm (27.25″) | 812.8 mm (32″) | 24 × Ø47.6 mm (1.87″) | 404 kg | Details → |
21 sizes · ASME B16.5 Class 400 · ASME B16.5-2025
ASME B16.5 Class 600 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 95.3 mm (3.75″) | 14.2 mm (0.56″) | 35.1 mm (1.38″) | 66.5 mm (2.62″) | 4 × Ø15.9 mm (0.63″) | 0.9 kg | Details → |
| 3/4″ | 20 | 117.3 mm (4.62″) | 15.7 mm (0.62″) | 42.9 mm (1.69″) | 82.6 mm (3.25″) | 4 × Ø19.1 mm (0.75″) | 1.4 kg | Details → |
| 1″ | 25 | 124 mm (4.88″) | 17.5 mm (0.69″) | 50.8 mm (2″) | 88.9 mm (3.5″) | 4 × Ø19.1 mm (0.75″) | 1.8 kg | Details → |
| 1¼″ | 32 | 133.4 mm (5.25″) | 20.6 mm (0.81″) | 63.5 mm (2.5″) | 98.6 mm (3.88″) | 4 × Ø19.1 mm (0.75″) | 2.3 kg | Details → |
| 1½″ | 40 | 155.4 mm (6.12″) | 22.4 mm (0.88″) | 73.2 mm (2.88″) | 114.3 mm (4.5″) | 4 × Ø22.2 mm (0.87″) | 3.6 kg | Details → |
| 2″ | 50 | 165.1 mm (6.5″) | 25.4 mm (1″) | 91.9 mm (3.62″) | 127 mm (5″) | 8 × Ø19.1 mm (0.75″) | 4.5 kg | Details → |
| 2½″ | 65 | 190.5 mm (7.5″) | 28.4 mm (1.12″) | 104.6 mm (4.12″) | 149.4 mm (5.88″) | 8 × Ø22.2 mm (0.87″) | 6.8 kg | Details → |
| 3″ | 80 | 209.6 mm (8.25″) | 31.8 mm (1.25″) | 127 mm (5″) | 168.1 mm (6.62″) | 8 × Ø22.2 mm (0.87″) | 9.1 kg | Details → |
| 3½″ | 90 | 228.6 mm (9″) | 35.1 mm (1.38″) | 139.7 mm (5.5″) | 184.2 mm (7.25″) | 8 × Ø25.4 mm (1″) | 13.2 kg | Details → |
| 4″ | 100 | 273.1 mm (10.75″) | 38.1 mm (1.5″) | 157.2 mm (6.19″) | 215.9 mm (8.5″) | 8 × Ø25.4 mm (1″) | 18.6 kg | Details → |
| 5″ | 125 | 330.2 mm (13″) | 44.5 mm (1.75″) | 185.7 mm (7.31″) | 266.7 mm (10.5″) | 8 × Ø28.6 mm (1.13″) | 30.8 kg | Details → |
| 6″ | 150 | 355.6 mm (14″) | 47.8 mm (1.88″) | 215.9 mm (8.5″) | 292.1 mm (11.5″) | 12 × Ø28.6 mm (1.13″) | 39 kg | Details → |
| 8″ | 200 | 419.1 mm (16.5″) | 55.6 mm (2.19″) | 269.7 mm (10.62″) | 349.3 mm (13.75″) | 12 × Ø31.8 mm (1.25″) | 63.5 kg | Details → |
| 10″ | 250 | 508 mm (20″) | 63.5 mm (2.5″) | 323.9 mm (12.75″) | 431.8 mm (17″) | 16 × Ø34.9 mm (1.37″) | 104 kg | Details → |
| 12″ | 300 | 558.8 mm (22″) | 66.5 mm (2.62″) | 381 mm (15″) | 489 mm (19.25″) | 20 × Ø34.9 mm (1.37″) | 134 kg | Details → |
| 14″ | 350 | 603.3 mm (23.75″) | 69.9 mm (2.75″) | 412.8 mm (16.25″) | 527.1 mm (20.75″) | 20 × Ø38.1 mm (1.5″) | 161 kg | Details → |
| 16″ | 400 | 685.8 mm (27″) | 76.2 mm (3″) | 469.9 mm (18.5″) | 603.3 mm (23.75″) | 20 × Ø41.3 mm (1.63″) | 225 kg | Details → |
| 18″ | 450 | 743 mm (29.25″) | 82.6 mm (3.25″) | 533.4 mm (21″) | 654.1 mm (25.75″) | 20 × Ø44.5 mm (1.75″) | 286 kg | Details → |
| 20″ | 500 | 812.8 mm (32″) | 88.9 mm (3.5″) | 584.2 mm (23″) | 723.9 mm (28.5″) | 24 × Ø44.5 mm (1.75″) | 367 kg | Details → |
| 22″ | 550 | 870 mm (34.25″) | 95.3 mm (3.75″) | 641.4 mm (25.25″) | 777.7 mm (30.62″) | 24 × Ø47.6 mm (1.87″) | — | Details → |
| 24″ | 600 | 939.8 mm (37″) | 101.6 mm (4″) | 692.2 mm (27.25″) | 838.2 mm (33″) | 24 × Ø50.8 mm (2″) | 567 kg | Details → |
21 sizes · ASME B16.5 Class 600 · ASME B16.5-2025
ASME B16.5 Class 900 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 120.7 mm (4.75″) | 22.4 mm (0.88″) | 35.1 mm (1.38″) | 82.6 mm (3.25″) | 4 × Ø22.2 mm (0.87″) | 1.8 kg | Details → |
| 3/4″ | 20 | 130 mm (5.12″) | 25.4 mm (1″) | 42.9 mm (1.69″) | 88.9 mm (3.5″) | 4 × Ø22.2 mm (0.87″) | 2.7 kg | Details → |
| 1″ | 25 | 149.4 mm (5.88″) | 28.4 mm (1.12″) | 50.8 mm (2″) | 101.6 mm (4″) | 4 × Ø25.4 mm (1″) | 3.6 kg | Details → |
| 1¼″ | 32 | 158.8 mm (6.25″) | 28.4 mm (1.12″) | 63.5 mm (2.5″) | 111.3 mm (4.38″) | 4 × Ø25.4 mm (1″) | 4.1 kg | Details → |
| 1½″ | 40 | 177.8 mm (7″) | 31.8 mm (1.25″) | 73.2 mm (2.88″) | 124 mm (4.88″) | 4 × Ø28.6 mm (1.13″) | 5.9 kg | Details → |
| 2″ | 50 | 215.9 mm (8.5″) | 38.1 mm (1.5″) | 91.9 mm (3.62″) | 165.1 mm (6.5″) | 8 × Ø25.4 mm (1″) | 11.3 kg | Details → |
| 2½″ | 65 | 244.3 mm (9.62″) | 41.1 mm (1.62″) | 104.6 mm (4.12″) | 190.5 mm (7.5″) | 8 × Ø28.6 mm (1.13″) | 15.9 kg | Details → |
| 3″ | 80 | 241.3 mm (9.5″) | 38.1 mm (1.5″) | 127 mm (5″) | 190.5 mm (7.5″) | 8 × Ø25.4 mm (1″) | 13.2 kg | Details → |
| 4″ | 100 | 292.1 mm (11.5″) | 44.5 mm (1.75″) | 157.2 mm (6.19″) | 235 mm (9.25″) | 8 × Ø31.8 mm (1.25″) | 24.5 kg | Details → |
| 5″ | 125 | 349.3 mm (13.75″) | 50.8 mm (2″) | 185.7 mm (7.31″) | 279.4 mm (11″) | 8 × Ø34.9 mm (1.37″) | 39.5 kg | Details → |
| 6″ | 150 | 381 mm (15″) | 55.6 mm (2.19″) | 215.9 mm (8.5″) | 317.5 mm (12.5″) | 12 × Ø31.8 mm (1.25″) | 52.2 kg | Details → |
| 8″ | 200 | 469.9 mm (18.5″) | 63.5 mm (2.5″) | 269.7 mm (10.62″) | 393.7 mm (15.5″) | 12 × Ø38.1 mm (1.5″) | 90.7 kg | Details → |
| 10″ | 250 | 546.1 mm (21.5″) | 69.9 mm (2.75″) | 323.9 mm (12.75″) | 469.9 mm (18.5″) | 16 × Ø38.1 mm (1.5″) | 132 kg | Details → |
| 12″ | 300 | 609.6 mm (24″) | 79.2 mm (3.12″) | 381 mm (15″) | 533.4 mm (21″) | 20 × Ø38.1 mm (1.5″) | 188 kg | Details → |
| 14″ | 350 | 641.4 mm (25.25″) | 85.9 mm (3.38″) | 412.8 mm (16.25″) | 558.8 mm (22″) | 20 × Ø41.3 mm (1.63″) | 236 kg | Details → |
| 16″ | 400 | 704.9 mm (27.75″) | 88.9 mm (3.5″) | 469.9 mm (18.5″) | 616 mm (24.25″) | 20 × Ø44.5 mm (1.75″) | 272 kg | Details → |
| 18″ | 450 | 787.4 mm (31″) | 101.6 mm (4″) | 533.4 mm (21″) | 685.8 mm (27″) | 20 × Ø50.8 mm (2″) | 386 kg | Details → |
| 20″ | 500 | 857.3 mm (33.75″) | 108 mm (4.25″) | 584.2 mm (23″) | 749.3 mm (29.5″) | 20 × Ø54 mm (2.13″) | 488 kg | Details → |
| 24″ | 600 | 1041.4 mm (41″) | 139.7 mm (5.5″) | 692.2 mm (27.25″) | 901.7 mm (35.5″) | 20 × Ø66.7 mm (2.63″) | 919 kg | Details → |
19 sizes · ASME B16.5 Class 900 · ASME B16.5-2025
ASME B16.5 Class 1500 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 120.7 mm (4.75″) | 22.4 mm (0.88″) | 35.1 mm (1.38″) | 82.6 mm (3.25″) | 4 × Ø22.2 mm (0.87″) | 1.8 kg | Details → |
| 3/4″ | 20 | 130 mm (5.12″) | 25.4 mm (1″) | 42.9 mm (1.69″) | 88.9 mm (3.5″) | 4 × Ø22.2 mm (0.87″) | 2.7 kg | Details → |
| 1″ | 25 | 149.4 mm (5.88″) | 28.4 mm (1.12″) | 50.8 mm (2″) | 101.6 mm (4″) | 4 × Ø25.4 mm (1″) | 3.6 kg | Details → |
| 1¼″ | 32 | 158.8 mm (6.25″) | 28.4 mm (1.12″) | 63.5 mm (2.5″) | 111.3 mm (4.38″) | 4 × Ø25.4 mm (1″) | 4.1 kg | Details → |
| 1½″ | 40 | 177.8 mm (7″) | 31.8 mm (1.25″) | 73.2 mm (2.88″) | 124 mm (4.88″) | 4 × Ø28.6 mm (1.13″) | 5.9 kg | Details → |
| 2″ | 50 | 215.9 mm (8.5″) | 38.1 mm (1.5″) | 91.9 mm (3.62″) | 165.1 mm (6.5″) | 8 × Ø25.4 mm (1″) | 11.3 kg | Details → |
| 2½″ | 65 | 244.3 mm (9.62″) | 41.1 mm (1.62″) | 104.6 mm (4.12″) | 190.5 mm (7.5″) | 8 × Ø28.6 mm (1.13″) | 15.9 kg | Details → |
| 3″ | 80 | 266.7 mm (10.5″) | 47.8 mm (1.88″) | 127 mm (5″) | 203.2 mm (8″) | 8 × Ø31.8 mm (1.25″) | 21.8 kg | Details → |
| 4″ | 100 | 311.2 mm (12.25″) | 53.8 mm (2.12″) | 157.2 mm (6.19″) | 241.3 mm (9.5″) | 8 × Ø34.9 mm (1.37″) | 33.1 kg | Details → |
| 5″ | 125 | 374.7 mm (14.75″) | 73.2 mm (2.88″) | 185.7 mm (7.31″) | 292.1 mm (11.5″) | 8 × Ø41.3 mm (1.63″) | 63.5 kg | Details → |
| 6″ | 150 | 393.7 mm (15.5″) | 82.6 mm (3.25″) | 215.9 mm (8.5″) | 317.5 mm (12.5″) | 12 × Ø38.1 mm (1.5″) | 72.6 kg | Details → |
| 8″ | 200 | 482.6 mm (19″) | 91.9 mm (3.62″) | 269.7 mm (10.62″) | 393.7 mm (15.5″) | 12 × Ø44.5 mm (1.75″) | 136 kg | Details → |
| 10″ | 250 | 584.2 mm (23″) | 108 mm (4.25″) | 323.9 mm (12.75″) | 482.6 mm (19″) | 12 × Ø50.8 mm (2″) | 231 kg | Details → |
| 12″ | 300 | 673.1 mm (26.5″) | 124 mm (4.88″) | 381 mm (15″) | 571.5 mm (22.5″) | 16 × Ø54 mm (2.13″) | 313 kg | Details → |
| 14″ | 350 | 749.3 mm (29.5″) | 133.4 mm (5.25″) | 412.8 mm (16.25″) | 635 mm (25″) | 16 × Ø60.3 mm (2.37″) | 442 kg | Details → |
| 16″ | 400 | 825.5 mm (32.5″) | 146.1 mm (5.75″) | 469.9 mm (18.5″) | 704.9 mm (27.75″) | 16 × Ø66.7 mm (2.63″) | 590 kg | Details → |
| 18″ | 450 | 914.4 mm (36″) | 162.1 mm (6.38″) | 533.4 mm (21″) | 774.7 mm (30.5″) | 16 × Ø73 mm (2.87″) | 794 kg | Details → |
| 20″ | 500 | 984.3 mm (38.75″) | 177.8 mm (7″) | 584.2 mm (23″) | 831.9 mm (32.75″) | 16 × Ø79.4 mm (3.13″) | 1009 kg | Details → |
| 24″ | 600 | 1168.4 mm (46″) | 203.2 mm (8″) | 692.2 mm (27.25″) | 990.6 mm (39″) | 16 × Ø92.1 mm (3.63″) | 1644 kg | Details → |
19 sizes · ASME B16.5 Class 1500 · ASME B16.5-2025
ASME B16.5 Class 2500 blind flange dimensions
| Size | DN | OD | Thickness | RF Ø | Bolt circle | Bolts | Weight | |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 15 | 133.4 mm (5.25″) | 30.2 mm (1.19″) | 35.1 mm (1.38″) | 88.9 mm (3.5″) | 4 × Ø22.2 mm (0.87″) | 3.2 kg | Details → |
| 3/4″ | 20 | 139.7 mm (5.5″) | 31.8 mm (1.25″) | 42.9 mm (1.69″) | 95.3 mm (3.75″) | 4 × Ø22.2 mm (0.87″) | 3.6 kg | Details → |
| 1″ | 25 | 158.8 mm (6.25″) | 35.1 mm (1.38″) | 50.8 mm (2″) | 108 mm (4.25″) | 4 × Ø25.4 mm (1″) | 5 kg | Details → |
| 1¼″ | 32 | 184.2 mm (7.25″) | 38.1 mm (1.5″) | 63.5 mm (2.5″) | 130 mm (5.12″) | 4 × Ø28.6 mm (1.13″) | 7.7 kg | Details → |
| 1½″ | 40 | 203.2 mm (8″) | 44.5 mm (1.75″) | 73.2 mm (2.88″) | 146.1 mm (5.75″) | 4 × Ø31.8 mm (1.25″) | 10.4 kg | Details → |
| 2″ | 50 | 235 mm (9.25″) | 50.8 mm (2″) | 91.9 mm (3.62″) | 171.5 mm (6.75″) | 8 × Ø28.6 mm (1.13″) | 17.7 kg | Details → |
| 2½″ | 65 | 266.7 mm (10.5″) | 57.2 mm (2.25″) | 104.6 mm (4.12″) | 196.9 mm (7.75″) | 8 × Ø31.8 mm (1.25″) | 25.4 kg | Details → |
| 3″ | 80 | 304.8 mm (12″) | 66.5 mm (2.62″) | 127 mm (5″) | 228.6 mm (9″) | 8 × Ø34.9 mm (1.37″) | 39 kg | Details → |
| 4″ | 100 | 355.6 mm (14″) | 76.2 mm (3″) | 157.2 mm (6.19″) | 273.1 mm (10.75″) | 8 × Ø41.3 mm (1.63″) | 61.2 kg | Details → |
| 5″ | 125 | 419.1 mm (16.5″) | 91.9 mm (3.62″) | 185.7 mm (7.31″) | 323.9 mm (12.75″) | 8 × Ø47.6 mm (1.87″) | 102 kg | Details → |
| 6″ | 150 | 482.6 mm (19″) | 108 mm (4.25″) | 215.9 mm (8.5″) | 368.3 mm (14.5″) | 8 × Ø54 mm (2.13″) | 156 kg | Details → |
| 8″ | 200 | 552.5 mm (21.75″) | 127 mm (5″) | 269.7 mm (10.62″) | 438.2 mm (17.25″) | 12 × Ø54 mm (2.13″) | 240 kg | Details → |
| 10″ | 250 | 673.1 mm (26.5″) | 165.1 mm (6.5″) | 323.9 mm (12.75″) | 539.8 mm (21.25″) | 12 × Ø66.7 mm (2.63″) | 465 kg | Details → |
| 12″ | 300 | 762 mm (30″) | 184.2 mm (7.25″) | 381 mm (15″) | 619.3 mm (24.38″) | 12 × Ø73 mm (2.87″) | 590 kg | Details → |
14 sizes · ASME B16.5 Class 2500 · ASME B16.5-2025
Matching the rest of the joint
A flange is only one part of the joint. The gasket, stud bolts and nuts must be selected to the same standard and facing, and the mating flange must be dimensionally identical. Raised face (RF) is standard: 1.5 mm high for Classes 150 and 300, 6.4 mm for Classes 400 to 2500, added to the minimum flange thickness. Flat face (FF) and ring-type joint (RTJ) faces are available on request.
ASME B16.5 flanges are not interchangeable with other standard families — even where the nominal size and pressure rating look equivalent. Compare the bolt circle and bolt count before ordering, or read the standards comparison guide.
ASME B16.5 reference: ratings, materials and tolerances
The dimension tables above answer “will it fit”. These pages answer “will it hold, at what temperature, in which material, and how is it marked” — transcribed from the same edition and cited table by table.