1.标准：无缝管GB13296/GB14976/ASTMA213/ASTMA269/A312/A789/EN10216/DIN17458/GOST9941-81焊管：GB12771/ASTMA249/A269/A554/A312/A10217/DIN17455/17457.2.材质;TP304(0Cr18Ni9),TP304L(0Cr18Ni10),TP321(1Cr18Ni10Ti),TP316L(00Cr17Ni14Mo2),TP310S,S31803,2205,904L等。)