... ) Stainless steel flange and carbon steel flange 2) Standard: ASME, ANSI, API, JIS, JPI, General Description1,Carbon steel, stainless steel and alloy flanges, ... , ANSI, JIS, DIN, and UNI.2,Flanges are the connectors used in process piping to connect pipe to tees, elbows, ... valves, pumps and whatever other equipment may be necessary. ...