Stainless Steel Pipes

Stainless steel pipe is a kind of hollow long round steel, mainly widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial transmission pipelines and mechanical structural parts, etc.. In addition, when the bending and torsion strength is the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used as furniture and kitchenware, etc.

Stainless steel tubes are divided into ordinary carbon steel tubes, high-quality carbon structural steel tubes, alloy structural tubes, alloy steel tubes, bearing steel tubes, stainless steel tubes and bimetallic composite tubes, plated and coated tubes to save precious metals and meet special requirements, etc. by material. Stainless steel tube of a wide variety of different uses, its technical requirements vary, the production method is also different. The current production of steel pipe outside diameter range 0.1-4500mm, wall thickness range 0.01 ~ 250mm. to distinguish their characteristics, usually according to the following method of classification of steel pipe.

Production method: stainless steel pipe according to the production method is divided into two categories of seamless and welded pipe, seamless steel pipe can be divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe and extruded pipe, cold-drawn, cold-rolled is the secondary processing of steel pipe; welded pipe is divided into straight seam welded pipe and spiral welded pipe, etc..

Section shape: stainless steel pipe can be divided into round and shaped according to the cross-sectional shape. Shaped tubes are rectangular tubes, diamond-shaped tubes, oval tubes, hexagonal tubes, eight square tubes and a variety of cross-sectional asymmetric tubes. Shaped tubes are widely used in various structural parts, tools and mechanical parts. Compared with round tubes, shaped tubes generally have a larger moment of inertia and cross-sectional modulus, have greater resistance to bending and torsion, can greatly reduce the weight of the structure, saving steel.

Stainless steel tube according to the shape of the longitudinal section can be divided into equal section tube and variable section tube. Variable section tube has a tapered tube, stepped tube and periodic section tube.

Tube end shape: stainless steel tube according to the end state can be divided into light tube and wire tube (with threaded steel tube). The threaded pipe can be divided into ordinary threaded pipe (water, gas and other low pressure pipe, using ordinary cylindrical or tapered pipe thread connection) and special threaded pipe (oil, geological drilling pipe, for important threaded pipe, using special threaded connection), for some special pipe, in order to compensate for the impact of the thread on the strength of the pipe end, usually before the threaded pipe end thickening (inside thickening, outside thickening or inside and outside thickening).

Application classification: According to the use can be divided into oil well pipe (casing, oil pipe and drill pipe, etc.), pipeline pipe, boiler pipe, mechanical structure pipe, hydraulic pillar pipe, gas cylinder pipe, geological pipe, chemical pipe (high-pressure fertilizer pipe, petroleum cracking pipe) and marine pipe, etc.

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