1,manufacturer of square and rectangular steel pipe 2,ISO, CE 3,best price and quick delivery ... 4,good service NAME: ASTM A500 rectangular & square steel pipe/tubeSTANDARD: ASTM A500, ASTM A53, BS EN 10219-2006, ... 12mUSAGE: construction, structure, shipbuilding, etcSURFACE TREATMENT: bared, galvanized, black (or color) paintedTECHNIQUE: hot rolled, erwPACKING: 1, in bundles strapped by steel ...