Petroleum, chemical, power, gas, metallurgy, shipbuilding.
construction,water and nuclear power etc.
MATERIA:Carbon steel Such as ASTM A234 WPB, WPC;
Alloy steel:such as ASTM A234 WP1, WP11, WP12, WP22, WP5, WP9, WP91
Stainless steel: such as ASTM A403 WP304/304L, WP316/316L
ANSI, ISO, JIS, DIN, BS,GB, SH, HG,QOST,ETC.
