... . 3) Wall thickness: SCH5S-SCH160S. 4) Standard: ASME/ANSI B16.9, GB/T12459, GB/T13401, SH3408, SH3409, HG/T21635 ... 321, 321H, 310S, 347H,S31803,904L,)6) Applications range: For use in the petroleum, smelting, foodstuff, power, papermaking, chemical, medical equipment ... iron trading market, and offer the first-class platform for steel trading. We will improving ourselves to provide customers ...