ASTM A312 is a standard specification for the manufacturing requirements and mechanical properties of stainless steel seamless and welded pipes. This standard applies to pipes with diameters ranging from 1/8 inch (6.4mm) to 30 inches (760mm) and thicknesses ranging from standard (SCH5S) to table XXS (SCHXS).
1. Pipe material selection: ASTM A312 standard applies to stainless steel materials, including Austenitic stainless steel, Ferritic/Austenitic stainless steel (duplex stainless steel) and martensitic stainless steel. Depending on the specific requirements, the pipe material can be manufactured by different processes such as hot rolling, cold rolling, cold drawing, welding, etc.
2. Pipe manufacturing method: ASTMA312 standard requires that seamless pipes be manufactured by cold working or hot working, while welded pipes need to be manufactured by automatic welding, manual welding or combination welding.
3. Pipe surface treatment: ASTMA312 standard stipulates that the outer and inner walls of seamless and welded pipes should be mechanically polished to meet certain surface finish requirements. In addition, the standard also stipulates the initial degreasing treatment, pickling treatment and cleaning treatment after processing of the pipeline.
GNEE has 25 sets of various mechanical equipment for precision manufacturing of steel pipes, including 15 cold rolling mills, 10 cold drawing mills, and two sets of heat treatment furnaces.
The production standards can be produced in accordance with relevant standards such as GB, HG, SH, SY, DL, ISO, ANSI/ASME, MSS, JIS, EN, AS, etc., and customized production can also be provided according to customer drawings.
GNEE can provide all grades of stainless steel pipes under ASTM A312 standard from DN15 (1/2") to DN3000 (120"), wall thickness grades SCH5S to SCH160 pipe prefabrication.
