SPECIFICATION · #1314
JIS B2220 30K 50A Slip-On
JIS B2220 · JIS B2220:2012 · DN50
Dimension drawing
Schematic, drawn from the table valuesD outside diameter · K bolt circle · n×Ød bolt holes · C thickness · D2 raised face · f raised-face height · A hub diameter · H length
Dimensions
JIS B2220 · 30K| DOutside diameter | 165mm |
|---|---|
| CFlange thickness / blind thickness | 22mm |
| D2Raised face diameter | 105mm |
| fRaised face height | 2mm |
| KBolt circle diameter | 130mm |
| nNumber of bolt holes | 8pcs |
| dBolt hole diameter | 19mm |
Pressure–temperature ratings
Current material group: Group 1.1 · 002, 003a
Source: Table 11 (pp. 15–16) — pressure-temperature rating, maximum working pressure in MPa
Maximum working pressure in MPa. Fluid temperatures are in °C. T_L is a minimum working temperature equal to or below the normal temperature. Interpolate proportionally between tabulated temperatures; do not extrapolate. A dash (—) means the standard gives no rating for that combination. Columns 450 to 510 °C apply to the 30K, 40K and 63K rows only.
Material & standard
JIS B2220JIS 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.
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Data note
Specification #1314 · last updated 2026-11-05 08:05
Use limits
This library is a factual compilation of published standards tables. It does not replace the standard text. Verify against the edition in your purchase specification before quoting, manufacturing or inspecting a critical part.