1. 标准:无缝管 GB 13296 / GB 14976 / ASTM A213 / 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. 材质; TP304(0Cr18Ni9), TP304L(0Cr18Ni10), TP321(1Cr18Ni10Ti), TP316L(00Cr17Ni14Mo2), TP310S, S31803, 2205, 904L等。