... steel 3.Cert:ISO9001:2008,TUV2010,PED2010 ANSI Carbon steel A-105 LB2000MainMaterialStainless steel,Carbon steel,Alloy steelWN/BL/PL/SO ... ,TYPE13GBGB9112~9125-88 GB/T13402-92GOSTGOST 12820-80 12821-80SpecificationClass150#,300#,400#,600#,900#,1500#,2500#,PN0.25,PN0.6,PN1 ...