FIELD: manufacture of plastic pipes. SUBSTANCE: plastic pipe coupling has a wall with a lesser axial stretching as compared with the wall of the pipe body. The coupling is moulded at one end of the blank by axial stretching of the pipe blank with the first degree of axial stretching, the pipe body is moulded with the second degree of axial stretching, in this case the first degree of axial stretching is lower than the second one. EFFECT: facilitated procedure. 22 cl, 6 dwg
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