JIS piping standards
Japanese Industrial Standards: Japanese pipe, flange and fitting standards; flanges are in K ratings (5K, 10K, 16K, 20K). 16 standards most used in piping, flanges, fittings, valves and materials.
| Standard | Covers | Category | On this site |
|---|---|---|---|
| JIS B2220 | Steel pipe flanges (5K, 10K, 16K, 20K, 30K) | Flanges | Open → |
| JIS B2311 | Steel buttwelding fittings for ordinary use | Fittings | Open → |
| JIS B2312 | Steel buttwelding pipe fittings | Fittings | Open → |
| JIS B2313 | Steel plate buttwelding pipe fittings | Fittings | Open → |
| JIS B2316 | Steel socket-welding pipe fittings | Fittings | Open → |
| JIS G3101 | Rolled steels for general structure (SS400) | Plate & structural | Open → |
| JIS G3452 | Carbon steel pipes for ordinary piping (SGP) | Pipe | Open → |
| JIS G3454 | Carbon steel pipes for pressure service (STPG) | Pipe | Open → |
| JIS G3455 | Carbon steel pipes for high-pressure service (STS) | Pipe | Open → |
| JIS G3456 | Carbon steel pipes for high-temperature service (STPT) | Pipe | Open → |
| JIS G3458 | Alloy steel pipes (STPA) | Pipe | Open → |
| JIS G3459 | Stainless steel pipes (SUS-TP) | Pipe | Open → |
| JIS G3460 | Steel pipes for low-temperature service (STPL) | Pipe | Open → |
| JIS G3463 | Stainless steel boiler and heat exchanger tubes | Tube | Open → |
| JIS G4303 | Stainless steel bars | Bars | Open → |
| JIS G4304 / G4305 | Hot- and cold-rolled stainless plate, sheet and strip | Plate & structural | Open → |
Subjects are short summaries, not official titles. Always buy the current edition from the issuing body; check which edition your project specification names.
Frequently asked questions
Which JIS standards cover piping?
JIS B2220 (steel pipe flanges); JIS B2311 (steel buttwelding fittings for ordinary use); JIS B2312 (steel buttwelding pipe fittings); JIS B2313 (steel plate buttwelding pipe fittings); JIS B2316 (steel socket-welding pipe fittings); JIS G3101 (rolled steels for general structure) and others listed on this page.
Last updated 2026-11-02