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.

Classification

Stainless steel pipe is divided into ordinary carbon steel pipe, high quality carbon structural steel pipe, alloy structural pipe, alloy steel pipe, bearing steel pipe, stainless steel pipe, as well as to save precious metals and meet the special requirements of bimetallic composite pipe, plating and coating pipe. 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 seamless and welded pipe two categories, 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 according to the cross-sectional shape can be divided into round and shaped pipe. 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 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 threaded 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.

product name	Stainless Steel Pipe Supplier
Grade	201.202.301.302.304.304L.309S.310S.316.316L.321.410.430.430A.
	440A.440B.440C.904L.2205.2507.2520 ect. Or Customized
Standard	GB, AISI, ASTM, ASME, EN, BS, DIN, JIS
Surface	Satin Finish(180#.240#.320#).,Bright Finish(400#,600#,mirror),
	Mill Finish(2B),Hairline-Finish
	(HL/Brushed),Ti-gold, Glossy matt,dull and so on.
specifications	Outer diameter	6mm-630mm or customized
	Wall thickness	0.1-30mm or customized
	Length	0.3-15.8m or customized
Technique	Cold rolled	welding or customized
	Hot rolled	seamless
Test and Inspection	Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT
Thickness tolerance	±0.05mm

Austenitic Stainless Steel	201, 301, 303, 304, 304L, 309S, 310S, 316/316L, 321, 347, 904L, etc
Martensitic Stainless Steel	410, 414, 416, 416, 420, 431, 440A, 440B, 440C, etc
Duplex Stainless Steel	S31803, S32101, S32205, S32304, S32750, etc
Ferritic Stainless Steel	429, 430, 433, 434, 435, 436, 439, etc