Sätt och anordning för att förhindra läckage vid transport av flytande kolväten genom plaströr

摘要

The leakage prevention device has a double-tube plastic line (1) consisting of an inner tube (5) with an outer tube (4) round it, forming an annular through passage between the tubes which extends continuously along the line. Devices (16, 17, 18, 20) to create a flow of gas or liquid send a flow between the ends of the line.