Stainless steel welded pipe, abbreviated as welded pipe, is commonly used as a steel pipe made by welding steel or steel strip after being rolled and formed by the machine and mold. The production process of welded steel pipes is simple, with high production efficiency, multiple varieties and specifications, and less equipment investment, but generally lower strength than seamless steel pipes.
Since the 1930s, with the rapid development of high-quality strip steel continuous rolling production and the advancement of welding and inspection technology, the quality of welds has been continuously improved, and the variety and specifications of welded steel pipes have been increasing. Seamless steel pipes have been replaced in more and more fields, especially in heat exchange equipment pipes, decorative pipes, medium and low pressure fluid pipes, etc.
According to the form of welding seam, it is divided into straight seam welded pipe and spiral welded pipe.
It can be divided into general welded pipes, heat exchanger pipes, condenser pipes, galvanized welded pipes, oxygen blown welded pipes, wire sleeves, metric welded pipes, roller pipes, deep well pump pipes, automotive pipes, transformer pipes, welded thin-walled pipes, welded special shaped pipes, and spiral welded pipes according to their purposes
GB/T12770-2002 (Stainless Steel Welded Steel Pipe for Mechanical Structures). Mainly used for machinery, cars, bicycles, furniture, hotel and restaurant decoration, and other mechanical components and structural components. Its representative materials include 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.
GB/T12771-2008 (Stainless Steel Welded Steel Pipe for Fluid Transport). Mainly used for transporting low-pressure corrosive media. The representative materials are 06Cr19Ni10, 022Cr19Ni10, 06Cr19Ni110Ti, 00Cr17, 0Cr18Ni11Nb, 06Cr17Ni12Mo2, etc.