1.Black Seamless Steel Pipe 2.OD:10-1170mm, WT:2-135mm 3.Professional manufacturer 4.Competitive price 5.Brand:SDTL Prime Seamless Steel Pipe OD10-1170mmWT2-135mmStandardGB/T5310-2008, ASTM A335, ASTM A387GradeCr-Mo alloy/ Mn-V alloySection shapeRoundApplicationmachinery, structure pipe, chemical and petroleum and so onMaterial12Cr1MoV, 15CrMo, Cr5Mo, P91, T91, P2, P5, P11, P12, 35CrMo, 42CrMo, ...