Abstract:

In the design of pipe supports and hangers, the selection of materials for supports and hangers in contact with the pipe body should be matched with the pipeline material. Considering that supports and hangers mainly play a supporting role in the pipeline system and do not have direct contact with the medium running inside the pipeline, the selection of materials for supports and hangers directly contact with the pipeline can be classified and optimized. In this paper, the chemical composition, mechanical properties, allowable stress and welding performance of 304 (S30408), 304H (S30409) and 304L (S30403) stainless steel materials are compared and analyzed. It is concluded that when the pipeline material is any one of these three stainless steels, 304 stainless steel can be used as the material for pipe supports in contact with the pipe body. In this way, a series of processes such as procurement, management, prefabrication and installation can be simplified, the corresponding cycles can be shortened, and the cost of materials, fabrication and installation can be effectively reduced, thus reducing the cost of engineering projects and offering great economic and social benefits.

Key words: pipe support and hanger, selection of material, 304 series stainless steel, optimal use