FIELD: construction industry.
SUBSTANCE: method for connecting multi-layer composite tubes is characterised by the fact that multi-layer composite tubes are connected through fittings by means of welding; at that, welding is performed simultaneously along cylindrical and edge surfaces of tube; for this purpose external, internal and edge surfaces and internal surfaces of fitting connected to the tube are pre-heated at one and the same time on end section of tube. Fitting for connecting multi-layer composite tubes is made in the form of coupling with internal fastener with cylindrical socket enveloping internal, edge and external tube surface.
EFFECT: weld formed after the cooling forms reliable joint protected against action of liquid flows.
5 cl, 8 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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| POLYMER PIPE LINE | 2000 |
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| POLYMER PIPE LINE | 1998 |
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