1)api 5l carbon seamless steel pipe 2) OD 19.05-508mm WT: 1-60mm 3) ASTM , DIN, JIS, EN, API, BS Standard 4) ... seamless steel tube/pipe 2) Certificate: ISO9001: 2000, PED(Pressure Equipment Directive), API 5L, API 5CT, TS16949, DNV, KR 3) Standard: ASTM/ASME - A106, A53 ... treatment: Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting. seamless round pipe api 5l carbon seamless steel pipe