... steel welded square profile/rectangular profile/hollow section/deformed profileTianjin Haiyunda Metal Material Co.,Ltd.Rectangular hollow section/Square steel pipe,Rectangular pipeDimensionSquare pipe ... BS1387-85 JIS-G3444SurfaceGalvanized,Oiled,Paint black or other requestEndPlainTechniqueERW,Hot Rolled,Cold RolledTypeWeldedApplicationStructure,Machinery,Airport,Railway,Building,Construction ETC. ...