... grade: 3000lb, 6000lb, 9000lb, sch80, sch160 3.Use: Petroleum, chemical, power,etc ProductsPIPES, Elbow, Bend, Tee ,Reducers ,Flange ,Cap , Corrugated Expansion ... 2617, DIN28011SGP:JISB2311 JISB2312 JISB2313EN:EN10253-1, EN10253-2UsePetroleum, Chemical, Power, Gas, Metallurgy, Shipbuilding, Construction, etc seamless steel pipe