Standard Specification

JIS B2220 Flange Standard — Japanese Industrial Specification 5K to 63K

JIS B2220 Japanese standard steel flange guide: 5K, 10K, 16K, 20K, 30K, SOP, SOH, WN, BL types, dimensions, bolt patterns, ASME/PN conversion. Quote in 30 min.

Standard Overview & Scope

JIS B2220 is the Japanese Industrial Standard for steel pipe flanges utilized throughout Asian shipbuilding, marine, and industrial plant engineering projects.

Official Standard Scope

JIS B2220 specifies dimensions, tolerances, materials, and testing for Japanese industrial steel pipe flanges in pressure ratings 2K through 63K.

Covered Size Range10A to 1500A (DN 10 to DN 1500)
Pressure Ratings / Classes5K, 10K, 16K, 20K, 30K, 40K, 63K

Related Standard & Material Guides

Standard Specification FAQs

Q: What does '10K' mean in JIS B2220?

A: '10K' represents a nominal pressure rating of approximately 10 kgf/cm² (1.0 MPa or ~150 psi). However, bolt patterns differ from ASME Class 150.

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