... days seamless boiler pipekey word:steel pipeproducts name:casing pipe,steel pipe,seamless pipe,seamless tube,pipe,tube,seamless steel pipe,seamlesss carbon steel pipe,we are ... ,steel tube,tube TypeAPI 5l seamless steel pipe,ASTM A 179 seamless boiler tube,seamless boiler pipeOuter diameter6-820mmWall thickness1mm-100mmStandardASTM ,API ,DINMaterialA25 ...