Seamless Cold Drawn Process is widely used in the production of heat exchanger tubes, condenser tubes, boiler tubes, machine tubes, OCTG tubes, and structure tubes... Main standard: ASTM / ASME A/SA179; ASTM / ASME A/SA192;ASTM / ASME A/SA210; ASTM / ASME A/SA213; ASTM / ASME A/SA106; ASTM A519; DIN 17175; DIN 2391, JIS G3445 STKM 11A. The OD. range from 3mm to 114mm, thickness from 0.5mm to 15mm. Length max 28m.