FIELD: construction engineering; erection of plastic pipe lines. SUBSTANCE: proposed permanent joint includes steel pipe, plastic pipe embracing steel pipe by its working part and coupling mounted on working part of plastic pipe. Said coupling covers additionally section of reinforced plastic pipe adjoining its working part; it is fitted by means of thread or welding. Steel pipe is provided with circular lug on which thread is cut for threaded joint with coupling. Steel pipe is connected with plastic branch pipe to which reinforced plastic pipe is welded; coupling is fitted by means of thread or welding. EFFECT: enhanced reliability of high-pressure pipe lines. 3 cl, 5 dwg
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|
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