This part specifies the type and code, type and size, requirements, test, inspection, marking, packaging, transportation and storage of stainless steel compression fittings (hereinafter referred to as fittings). This part applies to the design of stainless steel pipe fittings for drinking water, domestic drinking water, cold water, hot water, sea water, gas, medical gas, etc., with a nominal diameter not greater than DN100 and a nominal pressure not greater than PN1.6 (Mpa). Manufacturing and acceptance.