Method for welding together pipes consisting of...

Details Method for welding together pipes consisting of... Method for welding together pipes consisting of...

B - Operations, Transporting

29

C

B29C 65/34 (2006.01) B29C 65/00 (2006.01) F16L 47/03 (2006.01)

Patent

CA 2076156

For welding composite pipes (1, 1') together a welding ring (13) is used, which bears against the side wall portions (7, 8) of elevations (4). It consists of thermoplastic material and is provided with an electric resistance heating (19). Prior to welding there is an annular gap (23) between the front walls (10, 10') of the pipes (1, 1'), to which annular gap (23) a volume compensating groove (24) is associated in the welding ring (13). A connection of the pipes (1, 1') in their region outside of their inner pipe (2) is performed by an at least partial welding of the welding ring (13), the front walls (10, 10') bearing against each other in unwelded manner.

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