BACKSeamless steel pipe
Cold drawn seamless steel pipe
Description:Cold-drawn precision seamless steel pipe is a precision cold-drawn seamless pipe with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. The selection of precision seamless pipe manufacturing mechanical structure or hydraulic equipment can greatly save machining hours, improve material utilization, and help improve product quality.
parameters
Seamless pipe according to GB/T8162-2018 regulations
4.1, specification: hot rolled pipe diameter 32 ~ 630mm. Wall thickness 2.5 ~ 75mm. Cold rolled (cold drawn) pipe outer diameter 5 ~ 200mm. Wall thickness 2.5 ~ 12mm.
4.2 Appearance quality: the inner and outer surfaces of the steel pipe shall not have cracks, folding, rolling, separation, hair lines and scars. These defects should be completely removed, and the wall thickness and outside diameter should not exceed the negative deviation after removal.
introduction
Seamless pipes are very versatile. The general purpose seamless pipe is rolled by ordinary carbon structural steel, low alloy structural steel or alloy structural steel, and has the largest output, mainly used as a pipeline or structural part for conveying fluids.
2.2, according to the use of different supplies into three categories: a, according to chemical composition and mechanical properties supply; 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.
2.3. There are many kinds of seamless pipes for special purposes, such as boiler seamless pipes, geological seamless pipes and petroleum seamless pipes.
species
3.1, seamless steel pipe according to different production methods can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extrusion pipe, etc.
3.2. According to the shape classification, there are round tubes and special-shaped tubes. In addition to square tubes and rectangular tubes, there are oval tubes, semicircle tubes, triangular tubes, hexagonal tubes, convex tubes, quince-shaped tubes and so on.
