... the first-class agent of Baosteel, Capital steel (shougang), An steel , Ben steel, WISCO, HBIS, Ma steel , Ji steel , TPCO ,etc. Our factory mainly ... scaffolding pipes and for water, gas, sewerage conveyance ERW Steel Pipe O.DO.D toleranceW.TThickness Tolerance20--219MM±0. ... Middle east, Africa, North and South America, East and West Europe, South and southeast Asia AustraliaPlace of OriginChinaHS code: ...