Description:　　

      Stainless steel pipe is a kind of hollow long round steel, square steel and rectangular steel, which is widely used in petroleum, chemical industry, medical treatment, food, light industry, mechanical instrument and other industrial pipelines and mechanical structural components. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in manufacturing mechanical parts and engineering structures. It is also commonly used as furniture, kitchenware, etc.

Mode of production:

　　Stainless steel pipe can be divided into seamless pipe and welded pipe according to production mode. Seamless steel pipe can be divided into hot-rolled pipe, cold-rolled pipe, cold drawn pipe and extruded pipe. Cold drawing and cold rolling are secondary processing of steel pipe; welded pipe can be divided into straight welded pipe and spiral welded pipe.

Classification of uses:

　　It can be divided into oil well pipe (casing, oil pipe and drill pipe, etc.), pipeline pipe, boiler pipe, mechanical structure pipe, hydraulic prop pipe, gas cylinder pipe, geological pipe, chemical pipe (high pressure fertilizer pipe, petroleum cracking pipe) and ship pipe, etc.

Standard:

　　ASTM A213 Ferritic and austenitic alloy tubes for boilers and heat exchangers

　　ASTM A269 Austenitic stainless steel pipes and welded pipes for general use

　　ASTM A312 Austenitic stainless steel seamless steel pipe welded steel pipe

　　ASTM A789 General requirements seamless and welded for carbon and austenitic stainless steel pipes

　　JIS G3456-88 Stainless steel pipe for mechanical structure

　　JIS G3448-88 Stainless steel pipe for common pipe

　　JIS G3459-88 Stainless steel pipe for pipeline

　　JIS G3463-88 Stainless steel tube for boiler and heat exchanger