Stainless Steel Pipe Spec Table
Stainless steel pipes (SUS304/316) with far superior corrosion resistance and hygiene versus carbon steel. Essential for food, medical, pharmaceutical, and semiconductor process piping.
Practical Notes
- SUS304 is standard; SUS316 for seawater/chloride. SUS304 is vulnerable to chloride pitting corrosion.
- Passivation after welding is essential. Weld discoloration (heat tint) zones have significantly reduced corrosion resistance.
Selection Guide
For corrosion resistance and hygiene. SUS304 is standard; SUS316 for seawater/chloride environments. Used in food CIP piping, semiconductor ultrapure water, pharmaceutical GMP lines. Inner surface treatment (BA/EP) affects fluid contamination.
Stainless Steel Pipe
KSJISStainless Steel Pipe
11 sizesThe dimensions below are identical across KS D 3576 · JIS G 3459.
| Nominal | D | t | d | Weight | Standard |
|---|---|---|---|---|---|
| 6A | 10.5 | 1.2 | 8.1 | 0.28 | KS D 3576 |
| 8A | 13.8 | 1.65 | 10.5 | 0.49 | KS D 3576 |
| 10A | 17.3 | 1.65 | 14.0 | 0.64 | KS D 3576 |
| 15A | 21.7 | 1.65 | 18.4 | 0.82 | KS D 3576 |
| 20A | 27.2 | 1.65 | 23.9 | 1.04 | KS D 3576 |
| 25A | 34 | 2.2 | 29.6 | 1.73 | KS D 3576 |
| 32A | 42.7 | 2.2 | 38.3 | 2.2 | KS D 3576 |
| 40A | 48.6 | 2.5 | 43.6 | 2.84 | KS D 3576 |
| 50A | 60.5 | 2.8 | 54.9 | 3.98 | KS D 3576 |
| 65A | 76.3 | 3 | 70.3 | 5.42 | KS D 3576 |
| 80A | 89.1 | 3 | 83.1 | 6.36 | KS D 3576 |
Key Features
- KS D 3576 (STS304/316); corrosion resistance and hygiene make it food/semiconductor piping standard
- ERW and seamless manufacturing; weld zone supports NDT (RT/UT) inspection
- Bright annealing (BA), pickling (2B), electropolishing (EP) inner surface treatments minimize fluid contamination
Key Applications
Food CIP piping, semiconductor ultrapure water, pharmaceutical GMP lines, chemical transfer, offshore plants
STEP File Downloads
Free 3D CAD models (STEP AP214). Built to real standard dimensions; threads are simplified (plain shank) per free-library convention.
FAQ
Difference between SUS304 and SUS316?
SUS316 contains Mo (molybdenum) for much better chloride/saltwater corrosion resistance than SUS304. Use 316 for coastal, pool, and chemical plant environments.