What Are The Definition And Classification Of Steel Pipe Seamless?

The definition of steel pipe seamless

Seamless steel pipe is round steel pipe that has been completely perforated; the steel pipe's surface has not been welded. Petroleum geology drilling pipe, petrochemical cracking pipe, boiler tubes, bearing tubes, and high-precision structural steel pipe are the main applications.

The seamless steel pipe is made of perforated whole round steel, and the steel pipe without weld seam on the surface is called seamless steel pipe. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and pipe jacking. According to the cross-sectional shape, the seamless steel pipe is divided into two types: round and special-shaped. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemicals, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation.

The classification of steel pipe seamless

A steel pipe without seams along the perimeter of its cross-section. According to different production methods, it is divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe, pipe jacking, etc., all of which have their own process regulations. The materials are ordinary and high-quality carbon structural steel (Q215-A~Q275-A and 10~50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc. The use is divided into two categories: general use (for water, gas pipelines and structural parts, mechanical parts) and unique (for boilers, geological exploration, bearings, acid resistance, etc.).