ASTM AISI Standard Customizable Cold Rolled Square Stainless Steel Tube

Classification

Stainless steel pipe according to the material is divided into ordinary carbon steel pipe, high quality carbon structure steel pipe, alloy structure pipe, alloy steel pipe, bearing steel pipe, stainless steel pipe and bimetallic composite pipe, coating and coating pipe to save precious metals and meet special requirements. There are many kinds of stainless steel tubes, different uses, different technical requirements, production methods are also different. The current production of steel pipe outside diameter range 0.1 -- 4500mm, wall thickness range 0.01 ~ 250mm. In order to distinguish their characteristics, steel pipes are usually classified as follows.

Mode of Production

Stainless steel pipe according to the production method is divided into seamless pipe and welded pipe two categories, seamless steel pipe can also be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe and extrusion pipe, cold drawing, cold rolling is the secondary processing of steel pipe; Welded pipe is divided into straight seam welded pipe and spiral welded pipe.

Section Shape

Stainless steel pipe according to the cross section shape can be divided into round pipe and special-shaped pipe. Special-shaped tube has rectangular tube, diamond tube, elliptic tube, hexagonal tube, eight party tube and a variety of cross-section asymmetric tube. Profiled tubes are widely used in various structural parts, tools and mechanical parts. Compared with the round tube, the shaped tube generally has a larger moment of inertia and section modulus, has a larger bending and torsional resistance, can greatly reduce the weight of the structure, save steel.

Stainless steel pipe according to the profile shape can be divided into equal section pipe and variable section pipe. The variable section pipe has conical pipe, stepped pipe and periodic section pipe.

Pipe End Shape

Stainless steel pipe can be divided into light pipe and wire pipe (with spiral steel pipe) according to the state of the pipe end. Wire pipe can also be divided into ordinary wire pipe (conveying water, gas and other low pressure pipe, using ordinary cylindrical or conical pipe thread connection) and special thread pipe (petroleum, geological drilling pipe, for important wire pipe, using special thread connection), for some special pipe, in order to make up for the influence of thread on the strength of the pipe end, Tube end thickening (internal thickening, external thickening or internal and external thickening) is usually carried out before wire drawing.

Quality Inspection

Stainless steel products pipe is based on customer requirements for the outer diameter and surface of the pipe, thickness, and material to test its standards.

Some of the outside diameter requirements are very high, more accurate than the national standard precision range reduction; There are also some high requirements for external polishing need to polish to K face or draw polishing grain to achieve a higher number of eyes;

There is more need for the thickness of accurate to 1 silk within the need for both inside and outside to suite; Product management is customized to meet the needs, we in the process of production self-inspection, through the understanding of the product for important points to do product testing.

Only by truly understanding the demand can we produce and supply products that meet the standards; After the production quality is qualified, it is also necessary to keep an eye on the process in the follow-up links, and do the final detection when packing, so that the quality can be stable through multi-level checks.