... WP11,A234-WP5 1.Production:API 5L carbon steel pipe 2.Specification:21.3mm&457mm (1/2”-22”)*2mm ... Seamless,welded 9.Usage:Low and middle pressure fluid transportation pipeline, Casing Tube, Boiler Pipe, Pertroleunm and natural gas industry Chemistry ... :seamless steel pipe, ERW steel pipe, steel casing tubing, hot-rolled steel pipe, spiral steel pipe, hot-galvanized steel pipe steel pipe(plain end) ...