2.Abroad and domestic certificates:CE/PED,API 6D,ISO9001,DNV,AZ ect.
3.Cast Material:WCB,LCB,LCC,WC6,WC9,C5,C12,CF8,CF8M,CF3,CF3M,CN7M ect.
4.Forged Material:A105,LF2,F11,F22,SS304,SS316,SS304L,SS316L,20ALLOY ect.
5.Manufacture Standard: ANSI, API...