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LV.5 2019-12-16
What are the requirements for the production of stainless steel tubing
(1) Variety specifications. Specify the section shape, size and its allowable deviation, theoretical trial, etc. that stainless steel pipe fittings should have. Round tube specifications are usually expressed in DxS, for example, 50mmx2mm indicates that the outer diameter of the stainless steel pipe fittings is 50mm and the wall thickness is 2mm. the dimensional accuracy has the wall thickness accuracy, outer diameter accuracy and ellipticity.
(2) surface quality requirements. Specify the internal and external surface condition of stainless steel pipe fittings and the degree of surface defects allowed to exist.
(3) Chemical properties. Specify the chemical composition of the steel and the maximum content of P and S, as well as test methods, etc..
(4) organization and physical properties: the provisions of the steel grade House has the metallurgical organization, mechanical properties and process properties.
(5) test standards. Specify the test items, sampling parts, sample shape and size, test conditions and methods. In the production of stainless steel pipe fittings in addition to the conventional test items, sometimes also need to carry out some process performance tests.