API 5L GrB heat insulation steel pipe,ASME B36.10 OD:10.3-920mm ... Length:6m,random length Application:gas pipe API 5L GrB heat insulation steel pipe,ASME B36.10OD:10.3- ... XXSLength:6m,8m,10m,15m,random lengthApplication:drill pipe,oil pipe,dyraulic pipe,chemical fertilizer pipe etc.API,PED,ISO certificate,DIN,JIS ... requirement API 5L GrB heat insulation steel pipe,API,PED,ISO certificate,ASME B36.10