FIELD: construction and repair of pipe lines of sewage header. SUBSTANCE: tubular members of coating pipe are connected by ends provided with bushes and bell mouth; they have lock joints which consist of radial grooves and circular projections. End of pipe provided with bush has additional projection. When pipes are assembled, their members are engageable by ends of additional and terminal projections respectively with end of adjacent bell mouth and end of its radial circular groove, thus making it possible to redistribute axial forces in pipe. EFFECT: enhanced redistribution of axial forces in pipe. 4 cl, 1 dwg
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