METHOD FOR JOINING TWO PIPE ITEMS, A PIPE FITTING THEREFOR AND TWO PIPE ITEMS

摘要

The present invention relates to a method for connecting pipe elements and a pipe fitting to a method, and to two pipe elements. The process of the invention is characterized in that a metal tube assembly (12) is connected to one end of at least one tube member, the corrosion-resistant metal inner surface of the tube assembly (12) extending to the free end of the tube assembly (12) and lining at least a portion of the steel assembly (12) with thermoplastic liner tubes (30), squeezing the liner tube (12) and securing it to the grooves (20) of the steel assembly (12), and finally connecting the tube assembly (12) to at least one other tube member or other A pipe fitting for carrying out the method according to the invention comprises a pipe piece having grooves (20) with inner surface teeth (22) made of corrosion-resistant metal, and a metal ring (32) and pipe fitting (32) 2) a liner tube (30) of liner thermoplastic material pressed into the groove (20) by a ring (32) and a further tube assembly connected to the steel assembly (12) by welding. The two tubular members are characterized in that they are each connected to a tubular metal tubular fitting (12) having a corrosion-resistant metal inner surface provided with internal grooves (20) separated by teeth (22), and the two tubular fittings (12) being welded together a liner tube (30) of thermoplastic material, and each liner tube (30) is compressed in each tube assembly (12) with a suitable corrosion-resistant metal ring (32), and the liner tube (30) is embedded in the grooves (20) of the tube assembly (12). ŕ