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JIS B2220 · SS400 / S25C · stock and made to order

400A 10K Weld Neck (WN) Flange — JIS B2220

400A 10K weld neck flange to JIS B2220, machined from SS400 / S25C. Outside diameter 560 mm, thickness 28 mm, 16 bolt holes on a 510 mm circle. Available with raised face, flat face or the facing specified on your drawing.

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Technical drawing of a 400A 10K weld neck flange, JIS B2220
Dimensioned drawing supplied with the quotation and the inspection report.

Size

400A / DN400

Standard

JIS B2220 (JIS B2220:2012)

Pressure rating

10K

Outside diameter

560 mm

Thickness

28 mm

Bolt circle

510 mm

Full dimensions — 400A 10K

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 (this size) 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 →

Published JIS B2220 dimensions for every 10K 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 10K means in service

JIS 10K is a nominal rating of approximately 1 MPa (10 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 400A 10K
  • 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 10K

10A 10K Weld Neck (WN) 15A 10K Weld Neck (WN) 20A 10K Weld Neck (WN) 25A 10K Weld Neck (WN) 32A 10K Weld Neck (WN) 40A 10K Weld Neck (WN) 50A 10K Weld Neck (WN) 65A 10K Weld Neck (WN) 80A 10K Weld Neck (WN) 90A 10K Weld Neck (WN) 100A 10K Weld Neck (WN) 125A 10K Weld Neck (WN) 150A 10K Weld Neck (WN) 175A 10K Weld Neck (WN) 200A 10K Weld Neck (WN) 225A 10K Weld Neck (WN) 250A 10K Weld Neck (WN) 300A 10K Weld Neck (WN) 350A 10K Weld Neck (WN) 450A 10K Weld Neck (WN) 500A 10K Weld Neck (WN) 550A 10K Weld Neck (WN) 600A 10K Weld Neck (WN) All sizes and standards →

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400A 10K Weld Neck (WN) Flange

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