... , oil pipe, line pipe, steel pipe, steel line pipe, API 5ct 2. Specification: 1) OD: Seamless 1/2"-24" DN15-DN600 ... Standard: ASME/ANSI, ASTM, DIN, JIS, BS, EN, GB, API 6. Productive Technology: Hoe rolling, Cold rolling, Cold drawing 7 ... conservancy, electric power, boiler, machinery, gas, construction, heating, metallurgy and shipbuilding. 10. Marking: FRD, or as requirement. 11. Packing: Bundled ...