Referring to GB/T12771-2019 and other relevant national and industrial standards, Dachang stainless steel 2B plate is the raw material, 304/316L material from DN15-DN300 specifications, using advanced mechanical equipment, internal and external inert gas protection, single-sided welding and double-sided forming argon arc welding process, to ensure that the weld is full, silvery, and can withstand greater fluid pressure