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JIS B2220:2012 · Japan, Korea, South-East Asia, marine and shipbuilding

JIS B2220 flange dimensions — size chart and bolt patterns

JIS B2220 is the Japanese steel pipe flange standard, sized in millimetres from 10A to 600A and rated 5K, 10K, 16K, 20K and 30K. It is specified in Japanese-designed plants, shipbuilding, marine equipment and much of South-East Asian industry.

JIS flanges use metric bolt patterns and their own outside diameters and thicknesses. A JIS 10K flange is often described as roughly equivalent to ASME Class 150, but the bolt circle and outside diameter differ — a JIS flange must be ordered as JIS and matched with JIS bolts and gaskets. The 30K series runs from 10A to 400A, and 16K/20K do not include 175A or 225A.

Edition

JIS B2220:2012

Sizes

10A–600A

Ratings

5K · 10K · 16K · 20K · 30K

Flange types

Weld Neck (WN) · Slip-On Plate (SOP) · Blind (BL)

Region

Japan, Korea, South-East Asia, marine and shipbuilding

Size pages

330

Dimensions are in millimetres. Bolt hole diameter is the through-hole and flange thickness excludes the raised-face height (2 mm for JIS and EN). Every size links to its own specification page with the material options, facing details and certification information. Raised face (RF) is standard for steel JIS flanges; the raised-face height is 2 mm. Flat face is available on request.

Weld Neck (WN) Flanges — JIS B2220

Weld Neck (WN) product page →

Butt-weld JIS weld neck with a tapered hub, used for high-pressure and cyclic service in Japanese-designed plants and marine systems.

JIS B2220 5K weld neck (wn) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Hub Ø Length
10A 10 75 mm 9 mm 39 mm 55 mm 4 × Ø12 mm 26 mm 24 mm Details →
15A 15 80 mm 9 mm 44 mm 60 mm 4 × Ø12 mm 31 mm 25 mm Details →
20A 20 85 mm 10 mm 49 mm 65 mm 4 × Ø12 mm 38 mm 28 mm Details →
25A 25 95 mm 10 mm 59 mm 75 mm 4 × Ø12 mm 46 mm 30 mm Details →
32A 32 115 mm 12 mm 70 mm 90 mm 4 × Ø15 mm 55 mm 33 mm Details →
40A 40 120 mm 12 mm 75 mm 95 mm 4 × Ø15 mm 62 mm 34 mm Details →
50A 50 130 mm 14 mm 85 mm 105 mm 4 × Ø15 mm 73 mm 36 mm Details →
65A 65 155 mm 14 mm 110 mm 130 mm 4 × Ø15 mm 91 mm 39 mm Details →
80A 80 180 mm 14 mm 121 mm 145 mm 4 × Ø19 mm 105 mm 41 mm Details →
90A 90 190 mm 14 mm 131 mm 155 mm 4 × Ø19 mm 117 mm 41 mm Details →
100A 100 200 mm 16 mm 141 mm 165 mm 8 × Ø19 mm 128 mm 41 mm Details →
125A 125 235 mm 16 mm 176 mm 200 mm 8 × Ø19 mm 156 mm 43 mm Details →
150A 150 265 mm 18 mm 206 mm 230 mm 8 × Ø19 mm 184 mm 49 mm Details →
175A 175 300 mm 18 mm 232 mm 260 mm 8 × Ø23 mm 209 mm 49 mm Details →
200A 200 320 mm 20 mm 252 mm 280 mm 8 × Ø23 mm 235 mm 53 mm Details →
225A 225 345 mm 20 mm 277 mm 305 mm 12 × Ø23 mm 261 mm 54 mm Details →
250A 250 385 mm 22 mm 317 mm 345 mm 12 × Ø23 mm 290 mm 61 mm Details →
300A 300 430 mm 22 mm 360 mm 390 mm 12 × Ø23 mm 342 mm 62 mm Details →
350A 350 480 mm 24 mm 403 mm 435 mm 12 × Ø25 mm 385 mm 73 mm Details →
400A 400 540 mm 24 mm 463 mm 495 mm 16 × Ø25 mm 438 mm 76 mm Details →
450A 450 605 mm 24 mm 523 mm 555 mm 16 × Ø25 mm 491 mm 79 mm Details →
500A 500 655 mm 24 mm 573 mm 605 mm 20 × Ø25 mm 541 mm 79 mm Details →
550A 550 720 mm 26 mm 630 mm 665 mm 20 × Ø27 mm 593 mm 81 mm Details →
600A 600 770 mm 26 mm 680 mm 715 mm 20 × Ø27 mm 643 mm 81 mm Details →

24 sizes · JIS B2220 5K · JIS B2220:2012

JIS B2220 10K weld neck (wn) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Hub Ø Length
10A 10 90 mm 12 mm 46 mm 65 mm 4 × Ø15 mm 28 mm 29 mm Details →
15A 15 95 mm 12 mm 51 mm 70 mm 4 × Ø15 mm 33 mm 31 mm Details →
20A 20 100 mm 14 mm 56 mm 75 mm 4 × Ø15 mm 38 mm 32 mm Details →
25A 25 125 mm 14 mm 67 mm 90 mm 4 × Ø19 mm 47 mm 36 mm Details →
32A 32 135 mm 16 mm 76 mm 100 mm 4 × Ø19 mm 56 mm 38 mm Details →
40A 40 140 mm 16 mm 81 mm 105 mm 4 × Ø19 mm 62 mm 38 mm Details →
50A 50 155 mm 16 mm 96 mm 120 mm 4 × Ø19 mm 75 mm 40 mm Details →
65A 65 175 mm 18 mm 116 mm 140 mm 4 × Ø19 mm 92 mm 44 mm Details →
80A 80 185 mm 18 mm 126 mm 150 mm 8 × Ø19 mm 105 mm 45 mm Details →
90A 90 195 mm 18 mm 136 mm 160 mm 8 × Ø19 mm 117 mm 45 mm Details →
100A 100 210 mm 18 mm 151 mm 175 mm 8 × Ø19 mm 130 mm 45 mm Details →
125A 125 250 mm 20 mm 182 mm 210 mm 8 × Ø23 mm 156 mm 47 mm Details →
150A 150 280 mm 22 mm 212 mm 240 mm 8 × Ø23 mm 184 mm 53 mm Details →
175A 175 305 mm 22 mm 237 mm 265 mm 12 × Ø23 mm 210 mm 55 mm Details →
200A 200 330 mm 22 mm 262 mm 290 mm 12 × Ø23 mm 238 mm 58 mm Details →
225A 225 350 mm 22 mm 282 mm 310 mm 12 × Ø23 mm 261 mm 58 mm Details →
250A 250 400 mm 24 mm 324 mm 355 mm 12 × Ø25 mm 292 mm 65 mm Details →
300A 300 445 mm 24 mm 368 mm 400 mm 16 × Ø25 mm 345 mm 68 mm Details →
350A 350 490 mm 26 mm 413 mm 445 mm 16 × Ø25 mm 388 mm 79 mm Details →
400A 400 560 mm 28 mm 475 mm 510 mm 16 × Ø27 mm 442 mm 85 mm Details →
450A 450 620 mm 30 mm 530 mm 565 mm 20 × Ø27 mm 495 mm 90 mm Details →
500A 500 675 mm 30 mm 585 mm 620 mm 20 × Ø27 mm 546 mm 99 mm Details →
550A 550 745 mm 32 mm 640 mm 680 mm 20 × Ø33 mm 597 mm 111 mm Details →
600A 600 795 mm 32 mm 690 mm 730 mm 24 × Ø33 mm 648 mm 112 mm Details →

24 sizes · JIS B2220 10K · JIS B2220:2012

JIS B2220 16K weld neck (wn) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Length
10A 10 90 mm 12 mm 46 mm 65 mm 4 × Ø15 mm 31 mm Details →
15A 15 95 mm 12 mm 51 mm 70 mm 4 × Ø15 mm 32 mm Details →
20A 20 100 mm 14 mm 56 mm 75 mm 4 × Ø15 mm 34 mm Details →
25A 25 125 mm 14 mm 67 mm 90 mm 4 × Ø19 mm 36 mm Details →
32A 32 135 mm 16 mm 76 mm 100 mm 4 × Ø19 mm 39 mm Details →
40A 40 140 mm 16 mm 81 mm 105 mm 4 × Ø19 mm 39 mm Details →
50A 50 155 mm 16 mm 96 mm 120 mm 8 × Ø19 mm 40 mm Details →
65A 65 175 mm 18 mm 116 mm 140 mm 8 × Ø19 mm 46 mm Details →
80A 80 200 mm 20 mm 132 mm 160 mm 8 × Ø23 mm 49 mm Details →
90A 90 210 mm 20 mm 145 mm 170 mm 8 × Ø23 mm 50 mm Details →
100A 100 225 mm 22 mm 160 mm 185 mm 8 × Ø23 mm 56 mm Details →
125A 125 270 mm 22 mm 195 mm 225 mm 8 × Ø25 mm 60 mm Details →
150A 150 305 mm 24 mm 230 mm 260 mm 12 × Ø25 mm 69 mm Details →
200A 200 350 mm 26 mm 275 mm 305 mm 12 × Ø27 mm 73 mm Details →
250A 250 430 mm 28 mm 345 mm 380 mm 12 × Ø27 mm 81 mm Details →
300A 300 480 mm 30 mm 395 mm 430 mm 16 × Ø33 mm 88 mm Details →
350A 350 540 mm 34 mm 440 mm 480 mm 16 × Ø33 mm 104 mm Details →
400A 400 605 mm 38 mm 495 mm 540 mm 16 × Ø33 mm 115 mm Details →
450A 450 675 mm 40 mm 560 mm 605 mm 20 × Ø33 mm 126 mm Details →
500A 500 730 mm 42 mm 615 mm 660 mm 20 × Ø33 mm 128 mm Details →
550A 550 795 mm 44 mm 670 mm 720 mm 20 × Ø39 mm 135 mm Details →
600A 600 845 mm 46 mm 720 mm 770 mm 24 × Ø39 mm 141 mm Details →

22 sizes · JIS B2220 16K · JIS B2220:2012

JIS B2220 20K weld neck (wn) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Length
10A 10 90 mm 14 mm 46 mm 65 mm 4 × Ø15 mm 33 mm Details →
15A 15 95 mm 14 mm 51 mm 70 mm 4 × Ø15 mm 34 mm Details →
20A 20 100 mm 16 mm 56 mm 75 mm 4 × Ø15 mm 36 mm Details →
25A 25 125 mm 16 mm 67 mm 90 mm 4 × Ø19 mm 38 mm Details →
32A 32 135 mm 18 mm 76 mm 100 mm 4 × Ø19 mm 41 mm Details →
40A 40 140 mm 18 mm 81 mm 105 mm 4 × Ø19 mm 41 mm Details →
50A 50 155 mm 18 mm 96 mm 120 mm 8 × Ø19 mm 42 mm Details →
65A 65 175 mm 20 mm 116 mm 140 mm 8 × Ø19 mm 48 mm Details →
80A 80 200 mm 22 mm 132 mm 160 mm 8 × Ø23 mm 51 mm Details →
90A 90 210 mm 24 mm 145 mm 170 mm 8 × Ø23 mm 54 mm Details →
100A 100 225 mm 24 mm 160 mm 185 mm 8 × Ø23 mm 58 mm Details →
125A 125 270 mm 26 mm 195 mm 225 mm 8 × Ø25 mm 64 mm Details →
150A 150 305 mm 28 mm 230 mm 260 mm 12 × Ø25 mm 73 mm Details →
200A 200 350 mm 30 mm 275 mm 305 mm 12 × Ø25 mm 77 mm Details →
250A 250 430 mm 34 mm 345 mm 380 mm 12 × Ø27 mm 87 mm Details →
300A 300 480 mm 36 mm 395 mm 430 mm 16 × Ø27 mm 94 mm Details →
350A 350 540 mm 40 mm 440 mm 480 mm 16 × Ø33 mm 110 mm Details →
400A 400 605 mm 46 mm 495 mm 540 mm 16 × Ø33 mm 123 mm Details →
450A 450 675 mm 48 mm 560 mm 605 mm 20 × Ø33 mm 134 mm Details →
500A 500 730 mm 50 mm 615 mm 660 mm 20 × Ø33 mm 136 mm Details →
550A 550 795 mm 52 mm 670 mm 720 mm 20 × Ø39 mm 143 mm Details →
600A 600 845 mm 54 mm 720 mm 770 mm 24 × Ø39 mm 149 mm Details →

22 sizes · JIS B2220 20K · JIS B2220:2012

JIS B2220 30K weld neck (wn) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Length
10A 10 110 mm 16 mm 52 mm 75 mm 4 × Ø19 mm — Details →
15A 15 115 mm 18 mm 55 mm 80 mm 4 × Ø19 mm 45 mm Details →
20A 20 120 mm 18 mm 60 mm 85 mm 4 × Ø19 mm 45 mm Details →
25A 25 130 mm 20 mm 70 mm 95 mm 4 × Ø19 mm 48 mm Details →
32A 32 140 mm 22 mm 80 mm 105 mm 4 × Ø19 mm 52 mm Details →
40A 40 160 mm 22 mm 90 mm 120 mm 4 × Ø23 mm 54 mm Details →
50A 50 165 mm 22 mm 105 mm 130 mm 8 × Ø19 mm 57 mm Details →
65A 65 200 mm 26 mm 130 mm 160 mm 8 × Ø23 mm 69 mm Details →
80A 80 210 mm 28 mm 140 mm 170 mm 8 × Ø23 mm 73 mm Details →
90A 90 230 mm 30 mm 150 mm 185 mm 8 × Ø25 mm 74 mm Details →
100A 100 240 mm 32 mm 160 mm 195 mm 8 × Ø25 mm 76 mm Details →
125A 125 275 mm 36 mm 195 mm 230 mm 8 × Ø25 mm 86 mm Details →
150A 150 325 mm 38 mm 235 mm 275 mm 12 × Ø27 mm 95 mm Details →
200A 200 370 mm 42 mm 280 mm 320 mm 12 × Ø27 mm 102 mm Details →
250A 250 450 mm 48 mm 345 mm 390 mm 12 × Ø33 mm 118 mm Details →
300A 300 515 mm 52 mm 405 mm 450 mm 16 × Ø33 mm 127 mm Details →
350A 350 560 mm 54 mm 450 mm 495 mm 16 × Ø33 mm 134 mm Details →
400A 400 630 mm 60 mm 510 mm 560 mm 16 × Ø39 mm 149 mm Details →

18 sizes · JIS B2220 30K · JIS B2220:2012

Slip-On Plate (SOP) Flanges — JIS B2220

Slip-On Plate (SOP) product page →

JIS plate flange (SOP), the most common JIS slip-on type: economical, fillet-welded both sides, for general low-pressure piping.

JIS B2220 5K slip-on plate (sop) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Weight
10A 10 75 mm 9 mm 39 mm 55 mm 4 × Ø12 mm 0.26 kg Details →
15A 15 80 mm 9 mm 44 mm 60 mm 4 × Ø12 mm 0.3 kg Details →
20A 20 85 mm 10 mm 49 mm 65 mm 4 × Ø12 mm 0.36 kg Details →
25A 25 95 mm 10 mm 59 mm 75 mm 4 × Ø12 mm 0.45 kg Details →
32A 32 115 mm 12 mm 70 mm 90 mm 4 × Ø15 mm 0.77 kg Details →
40A 40 120 mm 12 mm 75 mm 95 mm 4 × Ø15 mm 0.82 kg Details →
50A 50 130 mm 14 mm 85 mm 105 mm 4 × Ø15 mm 1.06 kg Details →
65A 65 155 mm 14 mm 110 mm 130 mm 4 × Ø15 mm 1.48 kg Details →
80A 80 180 mm 14 mm 121 mm 145 mm 4 × Ø19 mm 1.97 kg Details →
90A 90 190 mm 14 mm 131 mm 155 mm 4 × Ø19 mm 2.08 kg Details →
100A 100 200 mm 16 mm 141 mm 165 mm 8 × Ø19 mm 2.35 kg Details →
125A 125 235 mm 16 mm 176 mm 200 mm 8 × Ø19 mm 3.2 kg Details →
150A 150 265 mm 18 mm 206 mm 230 mm 8 × Ø19 mm 4.39 kg Details →
175A 175 300 mm 18 mm 232 mm 260 mm 8 × Ø23 mm 5.42 kg Details →
200A 200 320 mm 20 mm 252 mm 280 mm 8 × Ø23 mm 6.24 kg Details →
225A 225 345 mm 20 mm 277 mm 305 mm 12 × Ø23 mm 6.57 kg Details →
250A 250 385 mm 22 mm 317 mm 345 mm 12 × Ø23 mm 9.39 kg Details →
300A 300 430 mm 22 mm 360 mm 390 mm 12 × Ø23 mm 10.2 kg Details →
350A 350 480 mm 24 mm 403 mm 435 mm 12 × Ø25 mm 14 kg Details →
400A 400 540 mm 24 mm 463 mm 495 mm 16 × Ø25 mm 16.9 kg Details →
450A 450 605 mm 24 mm 523 mm 555 mm 16 × Ø25 mm 21.4 kg Details →
500A 500 655 mm 24 mm 573 mm 605 mm 20 × Ø25 mm 23 kg Details →
550A 550 720 mm 26 mm 630 mm 665 mm 20 × Ø27 mm 30.1 kg Details →
600A 600 770 mm 26 mm 680 mm 715 mm 20 × Ø27 mm 32.5 kg Details →

24 sizes · JIS B2220 5K · JIS B2220:2012

JIS B2220 10K slip-on plate (sop) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Weight
10A 10 90 mm 12 mm 46 mm 65 mm 4 × Ø15 mm 0.51 kg Details →
15A 15 95 mm 12 mm 51 mm 70 mm 4 × Ø15 mm 0.56 kg Details →
20A 20 100 mm 14 mm 56 mm 75 mm 4 × Ø15 mm 0.72 kg Details →
25A 25 125 mm 14 mm 67 mm 90 mm 4 × Ø19 mm 1.12 kg Details →
32A 32 135 mm 16 mm 76 mm 100 mm 4 × Ø19 mm 1.47 kg Details →
40A 40 140 mm 16 mm 81 mm 105 mm 4 × Ø19 mm 1.55 kg Details →
50A 50 155 mm 16 mm 96 mm 120 mm 4 × Ø19 mm 1.86 kg Details →
65A 65 175 mm 18 mm 116 mm 140 mm 4 × Ø19 mm 2.58 kg Details →
80A 80 185 mm 18 mm 126 mm 150 mm 8 × Ø19 mm 2.64 kg Details →
90A 90 195 mm 18 mm 136 mm 160 mm 8 × Ø19 mm 2.73 kg Details →
100A 100 210 mm 18 mm 151 mm 175 mm 8 × Ø19 mm 3.1 kg Details →
125A 125 250 mm 20 mm 182 mm 210 mm 8 × Ø23 mm 4.73 kg Details →
150A 150 280 mm 22 mm 212 mm 240 mm 8 × Ø23 mm 6.3 kg Details →
175A 175 305 mm 22 mm 237 mm 265 mm 12 × Ø23 mm 6.75 kg Details →
200A 200 330 mm 22 mm 262 mm 290 mm 12 × Ø23 mm 7.46 kg Details →
225A 225 350 mm 22 mm 282 mm 310 mm 12 × Ø23 mm 7.7 kg Details →
250A 250 400 mm 24 mm 324 mm 355 mm 12 × Ø25 mm 11.8 kg Details →
300A 300 445 mm 24 mm 368 mm 400 mm 16 × Ø25 mm 12.6 kg Details →
350A 350 490 mm 26 mm 413 mm 445 mm 16 × Ø25 mm 16.3 kg Details →
400A 400 560 mm 28 mm 475 mm 510 mm 16 × Ø27 mm 23.2 kg Details →
450A 450 620 mm 30 mm 530 mm 565 mm 20 × Ø27 mm 29.3 kg Details →
500A 500 675 mm 30 mm 585 mm 620 mm 20 × Ø27 mm 33.3 kg Details →
550A 550 745 mm 32 mm 640 mm 680 mm 20 × Ø33 mm 42.9 kg Details →
600A 600 795 mm 32 mm 690 mm 730 mm 24 × Ø33 mm 45.4 kg Details →

24 sizes · JIS B2220 10K · JIS B2220:2012

JIS B2220 16K slip-on plate (sop) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Weight
10A 10 90 mm 12 mm 46 mm 65 mm 4 × Ø15 mm 0.51 kg Details →
15A 15 95 mm 12 mm 51 mm 70 mm 4 × Ø15 mm 0.57 kg Details →
20A 20 100 mm 14 mm 56 mm 75 mm 4 × Ø15 mm 0.74 kg Details →
25A 25 125 mm 14 mm 67 mm 90 mm 4 × Ø19 mm 1.15 kg Details →
32A 32 135 mm 16 mm 76 mm 100 mm 4 × Ø19 mm 1.47 kg Details →
40A 40 140 mm 16 mm 81 mm 105 mm 4 × Ø19 mm 1.61 kg Details →
50A 50 155 mm 16 mm 96 mm 120 mm 8 × Ø19 mm 1.79 kg Details →
65A 65 175 mm 18 mm 116 mm 140 mm 8 × Ø19 mm 2.51 kg Details →
80A 80 200 mm 20 mm 132 mm 160 mm 8 × Ø23 mm 3.53 kg Details →
90A 90 210 mm 20 mm 145 mm 170 mm 8 × Ø23 mm 3.8 kg Details →
100A 100 225 mm 22 mm 160 mm 185 mm 8 × Ø23 mm 4.76 kg Details →
125A 125 270 mm 22 mm 195 mm 225 mm 8 × Ø25 mm 6.92 kg Details →
150A 150 305 mm 24 mm 230 mm 260 mm 12 × Ø25 mm 9.35 kg Details →
200A 200 350 mm 26 mm 275 mm 305 mm 12 × Ø27 mm 11.8 kg Details →
250A 250 430 mm 28 mm 345 mm 380 mm 12 × Ø27 mm 19.6 kg Details →
300A 300 480 mm 30 mm 395 mm 430 mm 16 × Ø33 mm 23.6 kg Details →
350A 350 540 mm 34 mm 440 mm 480 mm 16 × Ø33 mm 33.5 kg Details →
400A 400 605 mm 38 mm 495 mm 540 mm 16 × Ø33 mm 46.3 kg Details →
450A 450 675 mm 40 mm 560 mm 605 mm 20 × Ø33 mm 60.5 kg Details →
500A 500 730 mm 42 mm 615 mm 660 mm 20 × Ø33 mm 71.7 kg Details →
550A 550 795 mm 44 mm 670 mm 720 mm 20 × Ø39 mm 85.8 kg Details →
600A 600 845 mm 46 mm 720 mm 770 mm 24 × Ø39 mm 96.1 kg Details →

22 sizes · JIS B2220 16K · JIS B2220:2012

JIS B2220 20K slip-on plate (sop) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts
10A 10 90 mm 14 mm 46 mm 65 mm 4 × Ø15 mm Details →
15A 15 95 mm 14 mm 51 mm 70 mm 4 × Ø15 mm Details →
20A 20 100 mm 16 mm 56 mm 75 mm 4 × Ø15 mm Details →
25A 25 125 mm 16 mm 67 mm 90 mm 4 × Ø19 mm Details →
32A 32 135 mm 18 mm 76 mm 100 mm 4 × Ø19 mm Details →
40A 40 140 mm 18 mm 81 mm 105 mm 4 × Ø19 mm Details →
50A 50 155 mm 18 mm 96 mm 120 mm 8 × Ø19 mm Details →
65A 65 175 mm 20 mm 116 mm 140 mm 8 × Ø19 mm Details →
80A 80 200 mm 22 mm 132 mm 160 mm 8 × Ø23 mm Details →
90A 90 210 mm 24 mm 145 mm 170 mm 8 × Ø23 mm Details →
100A 100 225 mm 24 mm 160 mm 185 mm 8 × Ø23 mm Details →
125A 125 270 mm 26 mm 195 mm 225 mm 8 × Ø25 mm Details →
150A 150 305 mm 28 mm 230 mm 260 mm 12 × Ø25 mm Details →
200A 200 350 mm 30 mm 275 mm 305 mm 12 × Ø25 mm Details →
250A 250 430 mm 34 mm 345 mm 380 mm 12 × Ø27 mm Details →
300A 300 480 mm 36 mm 395 mm 430 mm 16 × Ø27 mm Details →
350A 350 540 mm 40 mm 440 mm 480 mm 16 × Ø33 mm Details →
400A 400 605 mm 46 mm 495 mm 540 mm 16 × Ø33 mm Details →
450A 450 675 mm 48 mm 560 mm 605 mm 20 × Ø33 mm Details →
500A 500 730 mm 50 mm 615 mm 660 mm 20 × Ø33 mm Details →
550A 550 795 mm 52 mm 670 mm 720 mm 20 × Ø39 mm Details →
600A 600 845 mm 54 mm 720 mm 770 mm 24 × Ø39 mm Details →

22 sizes · JIS B2220 20K · JIS B2220:2012

JIS B2220 30K slip-on plate (sop) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts
10A 10 110 mm 16 mm 52 mm 75 mm 4 × Ø19 mm Details →
15A 15 115 mm 18 mm 55 mm 80 mm 4 × Ø19 mm Details →
20A 20 120 mm 18 mm 60 mm 85 mm 4 × Ø19 mm Details →
25A 25 130 mm 20 mm 70 mm 95 mm 4 × Ø19 mm Details →
32A 32 140 mm 22 mm 80 mm 105 mm 4 × Ø19 mm Details →
40A 40 160 mm 22 mm 90 mm 120 mm 4 × Ø23 mm Details →
50A 50 165 mm 22 mm 105 mm 130 mm 8 × Ø19 mm Details →
65A 65 200 mm 26 mm 130 mm 160 mm 8 × Ø23 mm Details →
80A 80 210 mm 28 mm 140 mm 170 mm 8 × Ø23 mm Details →
90A 90 230 mm 30 mm 150 mm 185 mm 8 × Ø25 mm Details →
100A 100 240 mm 32 mm 160 mm 195 mm 8 × Ø25 mm Details →
125A 125 275 mm 36 mm 195 mm 230 mm 8 × Ø25 mm Details →
150A 150 325 mm 38 mm 235 mm 275 mm 12 × Ø27 mm Details →
200A 200 370 mm 42 mm 280 mm 320 mm 12 × Ø27 mm Details →
250A 250 450 mm 48 mm 345 mm 390 mm 12 × Ø33 mm Details →
300A 300 515 mm 52 mm 405 mm 450 mm 16 × Ø33 mm Details →
350A 350 560 mm 54 mm 450 mm 495 mm 16 × Ø33 mm Details →
400A 400 630 mm 60 mm 510 mm 560 mm 16 × Ø39 mm Details →

18 sizes · JIS B2220 30K · JIS B2220:2012

Blind (BL) Flanges — JIS B2220

Blind (BL) product page →

JIS blind flange (BL) for line ends, isolation and test points.

JIS B2220 5K blind (bl) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Weight
10A 10 75 mm 9 mm 39 mm 55 mm 4 × Ø12 mm 0.3 kg Details →
15A 15 80 mm 9 mm 44 mm 60 mm 4 × Ø12 mm 0.33 kg Details →
20A 20 85 mm 10 mm 49 mm 65 mm 4 × Ø12 mm 0.41 kg Details →
25A 25 95 mm 10 mm 59 mm 75 mm 4 × Ø12 mm 0.52 kg Details →
32A 32 115 mm 12 mm 70 mm 90 mm 4 × Ø15 mm 0.91 kg Details →
40A 40 120 mm 12 mm 75 mm 95 mm 4 × Ø15 mm 1 kg Details →
50A 50 130 mm 14 mm 85 mm 105 mm 4 × Ø15 mm 1.38 kg Details →
65A 65 155 mm 14 mm 110 mm 130 mm 4 × Ø15 mm 2 kg Details →
80A 80 180 mm 14 mm 121 mm 145 mm 4 × Ø19 mm 2.67 kg Details →
90A 90 190 mm 14 mm 131 mm 155 mm 4 × Ø19 mm 2.99 kg Details →
100A 100 200 mm 16 mm 141 mm 165 mm 8 × Ø19 mm 3.66 kg Details →
125A 125 235 mm 16 mm 176 mm 200 mm 8 × Ø19 mm 5.16 kg Details →
150A 150 265 mm 18 mm 206 mm 230 mm 8 × Ø19 mm 7.47 kg Details →
175A 175 300 mm 18 mm 232 mm 260 mm 8 × Ø23 mm 9.52 kg Details →
200A 200 320 mm 20 mm 252 mm 280 mm 8 × Ø23 mm 12.1 kg Details →
225A 225 345 mm 20 mm 277 mm 305 mm 12 × Ø23 mm 13.9 kg Details →
250A 250 385 mm 22 mm 317 mm 345 mm 12 × Ø23 mm 19.2 kg Details →
300A 300 430 mm 22 mm 360 mm 390 mm 12 × Ø23 mm 24.2 kg Details →
350A 350 480 mm 24 mm 403 mm 435 mm 12 × Ø25 mm 33 kg Details →
400A 400 540 mm 24 mm 463 mm 495 mm 16 × Ø25 mm 41.7 kg Details →
450A 450 605 mm 24 mm 523 mm 555 mm 16 × Ø25 mm 52.7 kg Details →
500A 500 655 mm 24 mm 573 mm 605 mm 20 × Ø25 mm 61.6 kg Details →
550A 550 720 mm 26 mm 630 mm 665 mm 20 × Ø27 mm 80.8 kg Details →
600A 600 770 mm 26 mm 680 mm 715 mm 20 × Ø27 mm 92.7 kg Details →

24 sizes · JIS B2220 5K · JIS B2220:2012

JIS B2220 10K blind (bl) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Weight
10A 10 90 mm 12 mm 46 mm 65 mm 4 × Ø15 mm 0.53 kg Details →
15A 15 95 mm 12 mm 51 mm 70 mm 4 × Ø15 mm 0.6 kg Details →
20A 20 100 mm 14 mm 56 mm 75 mm 4 × Ø15 mm 0.79 kg Details →
25A 25 125 mm 14 mm 67 mm 90 mm 4 × Ø19 mm 1.22 kg Details →
32A 32 135 mm 16 mm 76 mm 100 mm 4 × Ø19 mm 1.66 kg Details →
40A 40 140 mm 16 mm 81 mm 105 mm 4 × Ø19 mm 1.79 kg Details →
50A 50 155 mm 16 mm 96 mm 120 mm 4 × Ø19 mm 2.23 kg Details →
65A 65 175 mm 18 mm 116 mm 140 mm 4 × Ø19 mm 3.24 kg Details →
80A 80 185 mm 18 mm 126 mm 150 mm 8 × Ø19 mm 3.48 kg Details →
90A 90 195 mm 18 mm 136 mm 160 mm 8 × Ø19 mm 3.9 kg Details →
100A 100 210 mm 18 mm 151 mm 175 mm 8 × Ø19 mm 4.57 kg Details →
125A 125 250 mm 20 mm 182 mm 210 mm 8 × Ø23 mm 7.18 kg Details →
150A 150 280 mm 22 mm 212 mm 240 mm 8 × Ø23 mm 10.1 kg Details →
175A 175 305 mm 22 mm 237 mm 265 mm 12 × Ø23 mm 11.8 kg Details →
200A 200 330 mm 22 mm 262 mm 290 mm 12 × Ø23 mm 13.9 kg Details →
225A 225 350 mm 22 mm 282 mm 310 mm 12 × Ø23 mm 15.8 kg Details →
250A 250 400 mm 24 mm 324 mm 355 mm 12 × Ø25 mm 22.6 kg Details →
300A 300 445 mm 24 mm 368 mm 400 mm 16 × Ø25 mm 27.8 kg Details →
350A 350 490 mm 26 mm 413 mm 445 mm 16 × Ø25 mm 36.9 kg Details →
400A 400 560 mm 28 mm 475 mm 510 mm 16 × Ø27 mm 52.1 kg Details →
450A 450 620 mm 30 mm 530 mm 565 mm 20 × Ø27 mm 68.4 kg Details →
500A 500 675 mm 30 mm 585 mm 620 mm 20 × Ø27 mm 81.6 kg Details →
550A 550 745 mm 34 mm 640 mm 680 mm 20 × Ø33 mm 112 kg Details →
600A 600 795 mm 36 mm 690 mm 730 mm 24 × Ø33 mm 134 kg Details →

24 sizes · JIS B2220 10K · JIS B2220:2012

JIS B2220 16K blind (bl) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts Weight
10A 10 90 mm 12 mm 46 mm 65 mm 4 × Ø15 mm 0.53 kg Details →
15A 15 95 mm 12 mm 51 mm 70 mm 4 × Ø15 mm 0.6 kg Details →
20A 20 100 mm 14 mm 56 mm 75 mm 4 × Ø15 mm 0.79 kg Details →
25A 25 125 mm 14 mm 67 mm 90 mm 4 × Ø19 mm 1.22 kg Details →
32A 32 135 mm 16 mm 76 mm 100 mm 4 × Ø19 mm 1.66 kg Details →
40A 40 140 mm 16 mm 81 mm 105 mm 4 × Ø19 mm 1.79 kg Details →
50A 50 155 mm 16 mm 96 mm 120 mm 8 × Ø19 mm 2.09 kg Details →
65A 65 175 mm 18 mm 116 mm 140 mm 8 × Ø19 mm 3.08 kg Details →
80A 80 200 mm 20 mm 132 mm 160 mm 8 × Ø23 mm 4.41 kg Details →
90A 90 210 mm 20 mm 145 mm 170 mm 8 × Ø23 mm 4.92 kg Details →
100A 100 225 mm 22 mm 160 mm 185 mm 8 × Ø23 mm 6.29 kg Details →
125A 125 270 mm 22 mm 195 mm 225 mm 8 × Ø25 mm 9.21 kg Details →
150A 150 305 mm 24 mm 230 mm 260 mm 12 × Ø25 mm 12.7 kg Details →
200A 200 350 mm 26 mm 275 mm 305 mm 12 × Ø27 mm 18.4 kg Details →
250A 250 430 mm 28 mm 345 mm 380 mm 12 × Ø27 mm 30.4 kg Details →
300A 300 480 mm 30 mm 395 mm 430 mm 16 × Ø33 mm 40.5 kg Details →
350A 350 540 mm 34 mm 440 mm 480 mm 16 × Ø33 mm 57.5 kg Details →
400A 400 605 mm 38 mm 495 mm 540 mm 16 × Ø33 mm 81.7 kg Details →
450A 450 675 mm 40 mm 560 mm 605 mm 20 × Ø33 mm 107 kg Details →
500A 500 730 mm 42 mm 615 mm 660 mm 20 × Ø33 mm 132 kg Details →
550A 550 795 mm 44 mm 670 mm 720 mm 20 × Ø39 mm 163 kg Details →
600A 600 845 mm 46 mm 720 mm 770 mm 24 × Ø39 mm 192 kg Details →

22 sizes · JIS B2220 16K · JIS B2220:2012

JIS B2220 20K blind (bl) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts
10A 10 90 mm 14 mm 46 mm 65 mm 4 × Ø15 mm Details →
15A 15 95 mm 14 mm 51 mm 70 mm 4 × Ø15 mm Details →
20A 20 100 mm 16 mm 56 mm 75 mm 4 × Ø15 mm Details →
25A 25 125 mm 16 mm 67 mm 90 mm 4 × Ø19 mm Details →
32A 32 135 mm 18 mm 76 mm 100 mm 4 × Ø19 mm Details →
40A 40 140 mm 18 mm 81 mm 105 mm 4 × Ø19 mm Details →
50A 50 155 mm 18 mm 96 mm 120 mm 8 × Ø19 mm Details →
65A 65 175 mm 20 mm 116 mm 140 mm 8 × Ø19 mm Details →
80A 80 200 mm 22 mm 132 mm 160 mm 8 × Ø23 mm Details →
90A 90 210 mm 24 mm 145 mm 170 mm 8 × Ø23 mm Details →
100A 100 225 mm 24 mm 160 mm 185 mm 8 × Ø23 mm Details →
125A 125 270 mm 26 mm 195 mm 225 mm 8 × Ø25 mm Details →
150A 150 305 mm 28 mm 230 mm 260 mm 12 × Ø25 mm Details →
200A 200 350 mm 30 mm 275 mm 305 mm 12 × Ø25 mm Details →
250A 250 430 mm 34 mm 345 mm 380 mm 12 × Ø27 mm Details →
300A 300 480 mm 36 mm 395 mm 430 mm 16 × Ø27 mm Details →
350A 350 540 mm 40 mm 440 mm 480 mm 16 × Ø33 mm Details →
400A 400 605 mm 46 mm 495 mm 540 mm 16 × Ø33 mm Details →
450A 450 675 mm 48 mm 560 mm 605 mm 20 × Ø33 mm Details →
500A 500 730 mm 50 mm 615 mm 660 mm 20 × Ø33 mm Details →
550A 550 795 mm 52 mm 670 mm 720 mm 20 × Ø39 mm Details →
600A 600 845 mm 56 mm 720 mm 770 mm 24 × Ø39 mm Details →

22 sizes · JIS B2220 20K · JIS B2220:2012

JIS B2220 30K blind (bl) flange dimensions

Size DN OD Thickness RF Ø Bolt circle Bolts
10A 10 110 mm 16 mm 52 mm 75 mm 4 × Ø19 mm Details →
15A 15 115 mm 18 mm 55 mm 80 mm 4 × Ø19 mm Details →
20A 20 120 mm 18 mm 60 mm 85 mm 4 × Ø19 mm Details →
25A 25 130 mm 20 mm 70 mm 95 mm 4 × Ø19 mm Details →
32A 32 140 mm 22 mm 80 mm 105 mm 4 × Ø19 mm Details →
40A 40 160 mm 22 mm 90 mm 120 mm 4 × Ø23 mm Details →
50A 50 165 mm 22 mm 105 mm 130 mm 8 × Ø19 mm Details →
65A 65 200 mm 26 mm 130 mm 160 mm 8 × Ø23 mm Details →
80A 80 210 mm 28 mm 140 mm 170 mm 8 × Ø23 mm Details →
90A 90 230 mm 30 mm 150 mm 185 mm 8 × Ø25 mm Details →
100A 100 240 mm 32 mm 160 mm 195 mm 8 × Ø25 mm Details →
125A 125 275 mm 36 mm 195 mm 230 mm 8 × Ø25 mm Details →
150A 150 325 mm 38 mm 235 mm 275 mm 12 × Ø27 mm Details →
200A 200 370 mm 42 mm 280 mm 320 mm 12 × Ø27 mm Details →
250A 250 450 mm 48 mm 345 mm 390 mm 12 × Ø33 mm Details →
300A 300 515 mm 52 mm 405 mm 450 mm 16 × Ø33 mm Details →
350A 350 560 mm 54 mm 450 mm 495 mm 16 × Ø33 mm Details →
400A 400 630 mm 60 mm 510 mm 560 mm 16 × Ø39 mm Details →

18 sizes · JIS B2220 30K · JIS B2220:2012

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 for steel JIS flanges; the raised-face height is 2 mm. Flat face is available on request.

JIS B2220 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.

JIS B2220 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.

Pressure–temperature ratings

Verified 4 Nov 2026

Material groups

Verified 4 Nov 2026

Tolerances

Verified 4 Nov 2026

Marking

Verified 4 Nov 2026

Flange types

Verified 4 Nov 2026

Other flange standards

ASME B16.5

ASME B16.5-2025

ASME B16.47 Series A

ASME B16.47-2025, Series A

ASME B16.47 Series B

ASME B16.47-2025, Series B

EN 1092-1

EN 1092-1:2018

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