Plastic pipe for pipe renovating pipe systems has male and female connectors with melting areas at outer and inner ends of coupling areas and metal component at contact point between two melting areas

摘要

The pipe has a male connector(130) at one end and female(240) at the other which, when brought together, form a positive connection between the pipes when joined to each other. At the outer(111,221) and inner(112,222) ends of each coupling area there are melting areas(111',112'221',222') extending axially. Metal components(3) are located in the outer or inner ends of the coupling areas so that at least one metal component exists at the contact point between two melting areas. Metal components(3) comprise woven metal fabric and mesh. Location of the metal components is in the melting areas(111',112',221',222') at the outer or inner end of the coupling areas(110,220). A positive connecting feature such as a groove, preferably a circumferential groove, is formed on the outer periphery of the pipe close to the coupling areas between two pipes. Clamping rings inserted in the grooves enable the pipes to be closed together. Independent claims are made for: a) a method for joining two of the claimed pipes(1,2) in which an inner and outer end melting area(111',221';112',222') of the front and rear pipe ends(11,22) are melted, the pipe ends are moved into each other under controled movement so that male and female connections engage with each other and the molten areas fuse together to form a material connection; b) equipment for joining two pipes including a stroke-controled actuator, preferably a hydraulic cylinder unit, which is connected to two coupling members engaged in the circumferential grooves around the pipe and an induction coil assigned to the metal components.