1. 標準：無縫管 GB 13296 / GB 14976 / ASTMA213 / ASTM A269 / A 312 / A789 / EN 10216 / DIN 17458 / GOST 9941-81

        焊管：GB 12771 / ASTM A249 / A269 / A554 / A312 / A 10217 / DIN 17455 /17457.

2.材質; TP304(0Cr18Ni9),TP304L(0Cr18Ni10), TP321(1Cr18Ni10Ti), TP316L(00Cr17Ni14Mo2), TP310S, S31803,2205, 904L等。