Seamless steel tube

A seamless steel tube made of whole metal with no seams on the surface is called a seamless steel tube.According to the production method, seamless pipe is divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extrusion pipe, top pipe, etc.According to the section shape, seamless steel pipe is divided into two types: circular and irregular. The shaped pipe has many complex shapes, such as square, oval, triangle, hexagonal, melon seed, star and winged pipe.The diameter is up to 650mm, and the minimum diameter is 0.3mm.Seamless steel pipe is mainly used for petroleum geological drilling pipe, petrochemical cracking pipe, boiler pipe, bearing pipe and high precision structural steel pipe for automobile, tractor and aviation.

classification

Non-jointed steel pipe around the periphery of its cross section.According to different production methods, it can be divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe, top pipe, etc.The materials are ordinary and high quality carbon structural steel (q215-a ~ q275-a and no. 10-50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid-resistant steel, etc.It can be divided into general purpose (for water conveyance, gas pipeline and structural parts, mechanical parts) and special purpose (for boiler, geological exploration, bearing, acid resistance, etc.).

use

Seamless steel tubes are widely used.Seamless steel tubes for general use are rolled from ordinary carbon structural steel, low alloy structural steel or alloy structural steel, with the highest yield and are mainly used as pipes or structural parts for conveying fluid..2. Supply according to different USES in three categories: a. supply according to chemical composition and mechanical properties;B. Supply according to mechanical properties;C. according to water pressure test.Steel pipes supplied according to a and b shall also be tested under water pressure if they are used to withstand liquid pressure.3. Special purpose seamless pipes include seamless pipes for boilers, seamless pipes for chemical power, seamless steel pipes for geological use and seamless pipes for petroleum use.

Seamless steel pipe has a hollow section and is widely used for conveying fluid, such as oil, gas, gas, water and some solid materials.Compared with solid steel such as round steel, steel pipe is a kind of economical section steel with a light weight and with the same bending and torsion resistance.

Widely used in the manufacture of structural and mechanical parts, such as petroleum drill pipe, auto transmission shaft, bicycle frame and construction of steel scaffolding is used with steel pipe manufacturing annular parts, such as can improve material utilization, simplifying the manufacturing process, material saving and processing time, has been widely used to make steel pipe.