... . Other joining techniques are welding and threaded joint.The flange faces are made to standardized dimensions ... “raised face”, “ tongue and groove” or “ ring joint” styles, although other obscure styles are possible.Flange designs are ... available as “ welding neck”, slip-on”, “boss””lap joint”, “ socket weld”, “threaded” and also “blind”.We ... request. Where can I buy the high quality flange?Ring Flange