... Drawn Tube/ Round Seamless Pipe1) Cold drawn seamless steel tube/pipe 2) Certificate: ISO9001: 2000, PED(Pressure Equipment Directive), API 5L, API 5CT, TS16949, DNV ... Test. Surface treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting. seamless round pipe api 5l carbon seamless steel pipe