... , Q345 ,Q215 , #20Section shaperound , square , rectangularKindSeamless and welded steel pipeWall Thickness 0.8-14mmOuter Diameter21-426mmLength3-12m or customizedZn ... be threaded at both ends , one end with steel socket and the other end with plastic capApplicationGreenhouse , ... oil or sewage conveying , heating steam , project pressure , bridge structure , oil(1) min order : 10 tons(2) paymente ...