The use and production process of seamless carbon steel pipe

Seamless Steel Pipe is perforated by the whole round steel, and the Steel Pipe with no weld on the surface is called seamless steel pipe. According to the production method, the seamless steel pipe can be divided into hot rolled seamless steel pipe, cold rolled seamless steel pipe, cold drawn seamless steel pipe, extruded seamless steel pipe, pipe jacking and so on. According to the section shape, the seamless steel pipe is divided into two kinds of round and shaped, shaped pipe has square, oval, triangle, hexagonal, melon seed, star, fin tube and many complex shapes. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick wall seamless steel pipes and thin wall seamless steel pipes. Seamless steel pipe is mainly used for petroleum geological drilling pipe, petrochemical cracking pipe,carbon steel Boiler Tube , bearing pipe and high-precision Structural Steel Pipe for automobiles, tractors and aviation.

Seamless steel pipe production process:

① Main production process of hot rolled seamless steel pipe:

Preparation and inspection △→ Heating → perforating → Rolling → reheating → Sizing → Heat treatment △→ Straightening → Finishing → Inspection △ (non-destructive, physical and chemical, table inspection) → storage

② Cold rolled (drawn) seamless steel pipe main production process:

Blank preparation → pickling lubrication → Cold rolling (drawing) → Heat treatment → straightening → finishing → inspection

The use of seamless steel pipe:

1, the general purpose seamless steel pipe is rolled by ordinary carbon structural steel, low alloy structural steel or alloy structural steel, the maximum output, mainly used as a pipeline or structural parts for transporting fluids.

2, according to different uses divided into three types of supply:

A. Supply according to chemical composition and mechanical properties;

b, according to mechanical performance supply;

c, according to water pressure test supply. Steel pipes supplied according to class a and b, such as those used to withstand liquid pressure, should also be hydraulically tested.

3, the special purpose of Seamless Pipe with boiler seamless pipe, chemical power, geological seamless pipe and petroleum seamless pipe and so on.

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Mainly products cover Carbon Steel Pipe, Structural Steel Pipe, Fluid Steel Pipe, Boiler Steel Pipe, Carbon Steel Plate, Ship Building Steel Plate and Vessel Steel Plate, etc.