API 5L GrB heat insulation steel pipe OD:10.3mm-1420mm WT:Sch SGP ... ,random length Application:boiler pipe API 5L GrB heat insulation steel pipeOD:10.3mm-1420mmWT:Sch SGP-XXSLength:6m, ... 10m,12m,random lengthApplication:boiler pipe,fluid pipe,gas/oil pipe etc. Material: API 5L Gr.B, ASTM A106 ... ,X60,X70,TP304L,TP316L, P91 API 5L GrB heat insulation steel pipe,API,PED,ISO certificate,DIN,JIS,BS standard ...