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the irregular pipes have various complex shapes, including square, elliptical, triangular, hexagonal, star and winged pipes the maximum diameter is 900mm, and the minimum diameter is 4mm. according to different purposes, there are thick walled seamless steel pipes and thin-walled seamless steel pipes mainly used as drilling pipes for petroleum geology, cracking pipes for petrochemicals, boiler pipes, bearing pipes, as well as high-precision structures for automobiles, tractors, and aviation.syi the product is a seamless steel pipe made by piercing a whole round steel without any welds on the surface seamless steel pipes can be divided into rolled seamless steel pipes, cold-rolled seamless steel pipes, cold drawn seamless steel pipes, extruded seamless steel pipes, and pipes there are two types of pipes: circular and irregular..

syi the product is a seamless steel pipe made by piercing a whole round steel without any welds on the surface seamless steel pipes can be divided into rolled seamless steel pipes, cold-rolled seamless steel pipes, cold drawn seamless steel pipes, extruded seamless steel pipes, and pipes there are two types of pipes: circular and irregular.the irregular pipes have various complex shapes, including square, elliptical, triangular, hexagonal, star and winged pipes the maximum diameter is 900mm, and the minimum diameter is 4mm.. according to different purposes, there are thick walled seamless steel pipes and thin-walled seamless steel pipes mainly used as drilling pipes for petroleum geology, cracking pipes for petrochemicals, boiler pipes, bearing pipes, as well as high-precision structures for automobiles, tractors, and aviation.

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