Method for welding together pipes consisting of thermoplastic plastics
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United States of America Patent
Stats
-
Jun 14, 1994
Grant Date -
N/A
app pub date -
Aug 26, 1992
filing date -
Sep 7, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
For welding composite pipes together a welding ring is used, which bears against the side wall portions of elevations. It consists of thermoplastic material and is provided with an electric resistance heating. Prior to welding there is an annular gap between the front walls of the pipes to which annular gap a volume compensating groove is associated in the welding ring. A connection of the pipes in their region outside of their inner pipe is performed by an at least partial welding of the welding ring, the front walls bearing against each other in unwelded manner.
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