The JIS B2220 10K Stainless Steel Weld Neck (WN) flange is the Japanese Industrial Standard for medium-pressure piping systems. Designed for high-integrity butt-welded connections, the 10K rating (approx. 10 bar) is widely used in maritime, chemical, and semiconductor industries. These flanges feature a tapered hub that provides structural reinforcement and eases stress at the weld joint. Stainless steel grades like SUS304 and SUS316 ensure superior corrosion resistance and longevity in aggressive environments.
Technical Attributes: JIS B2220 10K WN
Standard,JIS B2220 (Japan Industrial Standard)
Flange Type,Weld Neck (WN)
Pressure Class,10K (Nominal 1.0 MPa / 10 bar)
Materials,"SUS304, SUS316, SUS304L, SUS316L"
Size Range,10A to 1500A
Face Type,RF (Raised Face) or FF (Flat Face)
Connection,Butt-weld (Tapered Hub)
Manufacturing,Forging (JIS G3214)
Surface Finish,Smooth or Serrated (12.5 Ra typical)
Yield Strength,Min. 205 MPa (SUS304)
Tensile Strength,Min. 520 MPa (SUS304)
Max Temperature,350°C (Material/Pressure dependent)
Bolt Hole Qty,"Varies by size (e.g., 4 for 25A, 12 for 200A)"
Gasket Compatibility,"Non-asbestos, PTFE, or Spiral Wound"
Standardization,Common in Asian & Marine markets
Traceability,Mill Test Certificate (MTC) required
Weld Prep,37.5° Bevel standard
Industry Use,"Ship-building, Food, Chemical plants"
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