FIELD: operation of trunk pipelines, particularly their anticorrosion protection. SUBSTANCE: flexible hose with a torus inside is inserted into pipeline. End of the hose is turned inside out and secured on opposite end of pipeline. Space between turned-out end of the hose and torus is filled with air whose pressure moves said hose through pipeline and presses it against surface to be protected. EFFECT: higher efficiency. 1 dwg
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Authors
Dates
1994-09-30—Published
1990-02-16—Filed