This is the standard specification for black and hot-dipped, galvanized and welded steel pipes, used for fire protection in mechanical and pressurized applications. It is also used for steam, water, gas and air lines.
- GRADEyieldtensile
- CW
25 000
45 000 - GR-A
30 000
48 000 - GR-B
35 000
60 000
