Stainless Steel Welded Pipes For Mechanical Structures Used In Piping Systems

Main areas of use: machinery, cars, furniture, and other mechanical parts and structures. As for the textile industry, food production, pottery equipment, electric equipment, shipbuilding, etc., precision steel pipes, etc., there are no items such as purchase, support, combination, connection, etc.

This kind of stainless steel pipe in the application of needs assembled machinery, but also needs to bear a certain weight, and the working environment is relatively bad, parts are easy to corrosion; Therefore, there are relevant requirements for the making method, size deviation, and mechanical properties.

Pipe-making method: A single-sided automatic arc welding method with or without filler metal should be adopted, or a double-sided automatic arc welding method should be used to manufacture, if the filler metal material is added, its alloy composition should not be lower than the base metal, to ensure the oxidation resistance at the welding mouth.

Size deviation standard: the allowable deviation of the length of the steel pipe is ±20mm, and the incision allowance of 10~20mm should be left for each square length; The non-roundness of the pipe shall not exceed the allowable tolerance of the outer diameter, and the difference between the maximum and minimum measured outer diameter on any section of the thin-walled pipe shall not exceed 1.2% of the nominal outer diameter.

Surface quality: the inner and outer surface of stainless steel structural tubing is not allowed to have delamination, crack, folding, heavy skin, distortion, or oxide skin, the above defects should be completely removed, and the remaining wall thickness of the removal place should not be less than the minimum allowable wall thickness, depth does not exceed the wall thickness deviation of slight scratches, pits, pitting points allowed to exist; Weld wrong edge, bite edge, bump, sag, etc. should not be greater than the allowable deviation.