Cold drawn seamless steel tube offers better surface quality, external appearance, and size precision than the hot rolled product. It is normally used to build the structure of precision instruments, hydraulic equipment, and steel sleeves etc.

Both two-high mills and three-high mills are regularly used to produce cold drawn seamless steel pipes, and products produced by three-high mills have higher precision and accordingly comparatively higher cost. All products produced by our company have inner and outer diameter precision up to standard, and also offer high inner and outer surface smoothness, roundness, and straightness. These can effectively improve processing efficiency and improve material utilization rate as well.

Production Processes

Round tube blank → heating → piercing → annealing → acid washing→ oiling (copper plating) → cold drawing→ semi-finished tube → heat treatment →straightening → water pressure test or flaw detection → marking → warehousing.

Technical Specifications

1, Sizes: 1/4”~4” (21.3~114.3mm)

2, Wall Thickness: 2.24~13.49mm

3, Standard: API5L, ASTM A106

4, Steel Grade: GR.A, GR.B, X42, X46, X52

5, End Finish: Plain end, bevel end, thread, coupling, plastic cap

6, Pipe Coating: Black vanish, bare, clear oil