FIELD: construction.
SUBSTANCE: pipeline includes inner pipe and outer pipe, which surrounds inner pipe. Inner pipe is made of metal material and/or at least on some sections from synthetic material. A supporting code is placed on inner pipe, and core is made of half-shells, besides, half-shells are made of synthetic material, wax-like substance, moulding sand or other material, which may be easily removed. To form external pipe, synthetic material is placed onto supporting core. Outer pipe is hardened, and supporting core is removed by means of its chemical and/or thermal dissolution. At least on bent sections of pipeline the outer pipe is made of synthetic material.
EFFECT: invention simplifies process of pipeline making and its maintenance.
6 cl, 3 dwg
