... MANUFACTURE 2. ASTM ,GB ,JIS ,Q235,SS400 . 3.HIGH QUALITY AND COMPETITIVE PRICE 4.GOOD SERVICE welded pipeASTM A53 ERW ... ,over the year's technical capabilities and commitment to quality enable us to build abroad client base across a ... -457mm0.5mm-20mmLength1m-12m ,by customer’s requiremntsInternatioanal StandardISO 9000-2001StandardsASTMA53,BS1387-1985,GB/T3091-2001,EN39,BS1139MaterialsQ195,Q215,Q235 ...