JIS B2220 · SS400 / S25C · stock and made to order
40A 30K Blind (BL) Flange — JIS B2220
40A 30K blind flange to JIS B2220, machined from SS400 / S25C. Outside diameter 160 mm, thickness 22 mm, 4 bolt holes on a 120 mm circle. Available with raised face, flat face or the facing specified on your drawing.
Size
40A / DN40
Standard
JIS B2220 (JIS B2220:2012)
Pressure rating
30K
Outside diameter
160 mm
Thickness
22 mm
Bolt circle
120 mm
Full dimensions — 40A 30K
| 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 (this size) | 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 → |
Published JIS B2220 dimensions for every 30K size in this product family.
Dimensions in millimetres. Bolt hole diameter applies to through-holes. For stud length, gasket and bolting selection, match the gasket and bolts to JIS B2220.
What 30K means in service
JIS 30K is a nominal rating of approximately 3 MPa (30 kgf/cm²). The JIS B2220 Table 11 maximum working pressure for material group 1.1, Division I is higher than the nominal figure at up to 120 °C, then derates with temperature; read the table for your material group and division.
JIS K ratings are kgf/cm² nominal: 5K ≈ 0.5 MPa, 10K ≈ 1.0 MPa, 16K ≈ 1.6 MPa, 20K ≈ 2.0 MPa and 30K ≈ 3.0 MPa. The published maximum working pressure is higher or lower than the nominal figure depending on material group and division — for material group 1.1, Division I, the JIS B2220 Table 11 value at up to 120 °C is 0.7 MPa for 5K, 1.4 MPa for 10K, 2.7 MPa for 16K, 3.4 MPa for 20K, 5.1 MPa for 30K, 6.8 MPa for 40K and 10.7 MPa for 63K. Allowable pressure falls with temperature, and JIS bolt patterns differ from ASME classes of similar pressure.
Facing and materials
Raised face (RF) is standard for steel JIS flanges; the raised-face height is 2 mm. Flat face is available on request.
- SS400
- S25C
- SUS304
- SUS316
- SCS13 / SCS14 (cast)
Other grades, impact-tested heats and NACE MR0175 requirements are quoted on request. Material certificates to EN 10204 3.1 are issued against the same heat number as the dimensional report.
Inspection and delivery
- Dimensional inspection against the JIS B2220 table for 40A 30K
- Heat number stamped on the rim; EN 10204 3.1 certificate issued
- PMI on stainless and alloy heats; UT/RT on request
- Anti-rust oil, plywood case or pallet, with packing list and MTC
- Typical lead time 7–15 days for carbon steel stock sizes, 20–30 days for alloys
Other sizes in 30K
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40A 30K Blind (BL) Flange
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