Characteristics and specifications of 304 stainless steel welded pipe

What is 304 stainless steel welded pipe?

304 stainless steel welded pipe is a common austenitic stainless steel welded pipe. Its main components include 18% chromium and 8% nickel. It has excellent corrosion resistance, oxidation resistance and good formability. Because it contains nickel and chromium, it has good acid resistance, alkali resistance and heat resistance. 304 stainless steel welded pipe is widely used in construction, chemical industry, food processing, medicine and other fields.

The production process usually involves rolling stainless steel strips or plates into shape and then welding them into pipes using welding technology. Common welding methods include TIG (argon arc welding), MIG (gas metal arc welding), etc. The welded pipes are usually bright annealed to remove oxides on the inner and outer surfaces and improve corrosion resistance.

304 stainless steel welded pipes not only have good mechanical properties, but also have high temperature resistance and can work for a long time in high temperature environments. Suitable for environments that require corrosion resistance, high temperature resistance and pressure resistance

Characteristics of 304 stainless steel welded pipes

1. Small-diameter 304 stainless steel welded pipes are continuously produced online. The thicker the wall thickness, the greater the investment in the unit and welding equipment, and the less economical and practical it is. The thinner the wall thickness, the lower its input-output ratio will be;
2. The process of the product determines its advantages and disadvantages. Generally, 304 stainless steel welded pipes have high precision, uniform wall thickness, high brightness of the inner and outer surfaces of the pipe (the surface brightness of the steel pipe determined by the surface grade of the steel plate), and can be arbitrarily sized. Therefore, it reflects its economy and aesthetics in high-precision, medium and low-pressure fluid applications.

Uses of 304 stainless steel welded pipes

GB/T12770-2002 (stainless steel welded pipes for mechanical structures). Mainly used for machinery, automobiles, bicycles, furniture, hotel and restaurant decoration and other mechanical parts and structural parts. Its representative materials are 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.

GB/T12771-2008 (stainless steel welded pipes for fluid transportation). Mainly used for conveying low-pressure corrosive media. Representative materials are 06Cr19Ni10, 022Cr19Ni10, 06Cr19Ni110Ti, 00Cr17, 0Cr18Ni11Nb, 06Cr17Ni12Mo2, etc.

304 stainless steel welded pipe specifications

OD	WT	0.6（Standard thickness）	0.7	0.8	0.9	1	1.2	1.5	2	2.5	3	4
-	-	0.35	0.45	0.6	0.65	0.75	0.95	1.15	1.55	2.05	2.55	3.5
12.7		*	*	*	*	*	*	*	-	-	-	-
15.9		*	*	*	*	*	*	*	*	-	-	-
19.1		*	*	*	*	*	*	*	*	-	-	-
22.2		*	*	*	*	*	*	*	*	*	-	-
25.4		*	*	*	*	*	*	*	*	*	*	-
31.8		-	*	*	*	*	*	*	*	*	*	-
38.1		-	-	*	*	*	*	*	*	*	*	-
50.8		-	-	*	*	*	*	*	*	*	*	-
63.5		-	-	*	*	*	*	*	*	*	*	*
76.2		-	-	-	*	*	*	*	*	*	*	*
88.9		-	-	-	-	*	*	*	*	*	*	*
101.6		-	-	-	-	*	*	*	*	*	*	*
108		-	-	-	-	-	*	*	*	*	*	*
114.3		-	-	-	-	-	*	*	*	*	*	*
133		-	-	-	-	-	-	*	*	*	*	*
159		-	-	-	-	-	-	*	*	*	*	*

Calculation formula
Theoretical weight calculation formula for 304 stainless steel weld pipe Weight per meter:
M/kg=(outer diameter-wall thickness) x wall thickness x 0.02491
Unit: outer diameter mm, wall thickness mm, weight kg

From the perspective of domestic stainless steel pipe products, the steel type is mainly austenitic steel.
1. Seamless steel pipes include cold-drawn pipes, cold-rolled pipes, hot-extruded pipes, centrifugal casting pipes, and spinning pipes;
2. Welded pipes include: plasma welding, argon arc welding, submerged arc welding, light speed welding, and high frequency welding.
The stainless steel pipes that my country can produce basically cover the varieties and specifications of the standards of various countries in the world. The specifications and varieties of stainless steel special-shaped pipes also reach more than 100, and the product uses involve many fields of industry and civil use. However, in general, the current domestic stainless steel pipes have a certain gap with market demand in terms of variety, specification, quantity, etc.