321 Stainless Steel Pipe

What are the introduction and uses of 321 stainless steel pipes?

Stainless steel pipeis a kind of hollow long round steel, mainly used in petroleum, chemical, medical, food, light industry, mechanical instrumentation, and other industrial transmission pipelines and mechanical structural components. In addition, when the bending and the torsional strength are the same, the weight is light, so it is also widely used for manufacturing mechanical parts and engineering structures. Also commonly used as furniture and other kitchen utensils.

Stainless steel pipes are available in a wide range of connections. Common types of pipes include compression, compression, union, push, push screw, socket weld, live flange, welded and welded, and conventional connections. Combined derived series connection. These connection methods, based on their different principles, have different application scopes, but most of them are easy to install, solid, and reliable. Most of the sealing rings or gasket materials used in the connection are silicone rubber, nitrile rubber, and EPDM rubber that meet the requirements of national standards, eliminating the user's worries.

What are the classifications of ?

The stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, and bimetallic composite pipes, coatings, and coated pipes to save precious metals and meet special requirements. Stainless steel pipes have a wide range of types and different uses. Their technical requirements are different, and production methods are also different. The current production of steel pipe diameter range of 0.1-4500mm, wall thickness range of 0.01-250mm. In order to distinguish its characteristics, the steel pipes are generally classified as follows.

1. , cold-rolled pipes, cold-drawn pipes, and extruded pipes. Cold-drawing and cold-rolling are secondary steel pipes. Processing; welded pipe is divided into straight seam welded pipe and spiral welded pipe.
2. can be divided into round tubes and shaped tubes according to the cross-sectional shape. Special-shaped tubes include rectangular tubes, diamond tubes, elliptical tubes, hexagonal tubes, octane tubes, and various cross-section asymmetric tubes. Shaped tubes are widely used in various structural components, tools, and mechanical components. Compared with a round pipe, a special-shaped pipe generally has a larger moment of inertia and section modulus, and it has greater resistance to bending and torsion, which can greatly reduce the structural weight and save steel.

Product	321 Stainless steel seamless pipe
Finish
Diameter
Wall Thickness
Length	As per client's requirement, max length: 12000mm
Standard	ASTM A312/A312M, ASTM A213/A213M, ASTM A249/A269
Grade	321/321H/S32100/S32109/1.4541/SUS321/08X18H10T

Product	321 Stainless steel welded pipe(For Industry Use)
Finish
Diameter
Wall Thickness
Length	As per client's requirement, max length: 12000mm
Standard	ASTM A312/A312M, ASTM A213/A213M, ASTM A249/A269
Grade	321/321H/S32100/S32109/1.4541/SUS321/08X18H10T

Product	321 Stainless steel welded pipe(For Decoration Use)
Finish	600#, HL, NO.4
Diameter	9mm-273mm
Wall Thickness
Length	As per client's requirement, max length: 12000mm
Standard	ASTM A312/A312M, ASTM A249/A269
Grade	321/321H/S32100/S32109/1.4541/SUS321/08X18H10T

What is the performance of stainless steel pipe？

Welding performance: All standard welding methods can be used for welding. Welding can be based on the use of 316Cb, 316L, or 309Cb stainless steel filler rods or electrodes for welding. In order to obtain the best corrosion resistance, the welded section of needs post-weld annealing. If 316L stainless steel is used, post-weld annealing is not required.

Corrosion resistance: In this regard, the total performance of 316 steel is better than that of 310 and 304 stainless steel. Under high-temperature conditions, 316 stainless steel has a wide range of uses when the concentration of sulfuric acid is lower than 15% and higher than 85%. And the paper production process has good corrosion resistance.

Applications of 321 stainless steel pipe:

Typical compositional ranges for grade321 stainless steel pipeare given in table 1.Table 1. Composition ranges for 321-grade stainless steel

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N	Other
321	max	–0.08	19.0					-	12.0		Ti=5(C+N)0.70
321H	max 0.10 19.0							-	12.0	-	Ti=4(C+N)0.70
347	max 19.0							-	13.0	-	Nb=10(C+N)1.0

Typical mechanical properties for grade are given in table 2.Table 2. Mechanical properties of 321-grade stainless steel

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
321	515	205	40	95	217
321H	515	205	40	95	217
347	515	205	40	92	201

We are a professional supplier and manufacturer of seamless 321 stainless steel pipes, welded 321 stainless steel tubing, and a decorativewith various diameter and wall thickness. We are from China, we offer you a competitive price.

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