Stainless steel pipe

Stainless steel pipe is a long steel strip with a hollow cross-section, non-magnetic, and usually used as a pipeline for conveying fluids.

The full name of the common 304 stainless steel pipe is SUS304 stainless steel pipe. SUS304 stainless steel pipe belongs to the American grade stainless steel pipe. The domestic grade in China is equivalent to 0Cr19Ni9 stainless steel pipe, which is usually replaced by 0Cr18Ni9.

Stainless steel seamless pipe is a steel pipe that is resistant to corrosion by weak corrosive media such as air, steam, and water, and chemically corrosive media such as acids, alkalis, and salts. It is also called stainless acid-resistant steel pipe.

The corrosion resistance of stainless steel pipes depends on the alloying elements contained in the steel.

Chromium is the basic element that makes stainless steel corrosion-resistant. When the chromium content in steel reaches about 12%, chromium reacts with oxygen in the corrosive medium to form a very thin oxide film (self-passivation film) on the surface of the steel, which can prevent further corrosion of the steel matrix.

In addition to chromium, the commonly used alloying elements for stainless steel seamless pipes include nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the requirements of stainless steel organization and performance for various uses.

Stainless steel pipes can be divided into stainless steel seamless pipes and stainless steel welded pipes according to the production process, like ordinary steel pipes, according to the shape, they can be divided into round pipes and special-shaped pipes (square pipes, rectangular pipes, semi-circular pipes, etc.), according to the rolling method, they can be divided into hot-rolled, hot-extruded and cold-drawn (rolled) stainless steel pipes, etc.

According to the different metallographic structures of stainless steel, stainless steel pipes can be divided into semi-ferrite and semi-martensitic stainless steel pipes, martensitic stainless steel pipes, austenitic stainless steel pipes, austenitic-ferritic stainless steel pipes, etc.

Stainless steel pipes are safe, reliable, hygienic, environmentally friendly, economical and applicable. The successful development of thin-walled pipes and new reliable, simple and convenient connection methods have given them many irreplaceable advantages over other pipes. Their application in engineering is very popular and has a good prospect.

Seamless pipe specifications
Minimum outer diameter 6mm, maximum 762mm
Minimum wall thickness 1mm, maximum 40mm

Welded pipe specifications
Minimum outer diameter 12.7mm, maximum 4800mm
Minimum wall thickness 1mm, maximum 50mm

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