| 摘要 |
The method for production of multilayer spiral-seamed welded polymeric pipes of large diameter with honeycomb wall consists in that preliminarily extruded material of wall, mainly of round cross section, is formed with the help of the rolls in the spiral of required diameter, directing them at an angle to the longitudinal axis of the pipe under construction. The formation of the wall of pipe is achieved by simultaneous winding on and comprehensive welding of the turns of spirals, which are placed one over another with displacement between them up to the distance, which is equal to a radius of the extruded material, from which the spiral is wound.
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