Small-diameter thick-walled seamless pipe is steel pipe with a small ratio of outer diameter to wall thickness, with a minimum diameter of 3mm and a minimum wall thickness of 1mm. They are mainly used as petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe and high-precision structural pipe for automobile, tractor, aviation, etc. The  materials are: 10#, 20#. 25#, 35#, 45#, 16Mn, etc.

The weight formula of small-diameter thick-walled seamless steel pipe: [(outer diameter-wall thickness)*wall thickness]*0.02466=kg/meter (weight per meter)

Production process: Round tube blank → heating → perforation → three-roll skew rolling, continuous rolling or extrusion → pipe removal → sizing (or diameter reduction) → cooling → straightening → hydraulic test (or flaw detection) → marking → storage

Changsha Xiangjia Metal Materical Co., Ltd. the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.