PIPELINE

摘要

FIELD: civil engineering; insulating constructions of underground pipelines designed for transportation of heat carrier. SUBSTANCE: pipeline has carrying tight shell and ring grooves connected with drain valve, heat insulating layer covered with water-proofing layer and air space made in form of flexible hose wound onto pipe along screw guide and filled with air or gas at gauge pressure. EFFECT: provision of stable temperature conditions of liquid moving along pipe. 1 dwg