METHOD OF PIPELINE REPAIR

摘要

FIELD: transport. ^ SUBSTANCE: proposed method comprises the following stages, i.e. determining pipeline emergency zone and opening pipeline in aforesaid zone. It includes also deseaming flawed zone to pinpoint location and character of surface defect. To recover pipeline emergent zone (fracture), special steel coupling is fitted at the damage point. Coupling ID equals pipeline OD (d2), coupling length (4-5)d2 and wall thickness makes at least 0.7-0.8d2. Coupling is attached to pipeline edges by cold gasdynamic deposition. Deposited layer length make at least (2-3)d2 and coat thickness approximates to 0.8-1.2d2. ^ EFFECT: recovering tightness of pipeline with inner pressure exceeding 40 MPa. ^ 5 dwg