FIELD: carrying pipe lines; protection of pipe lines against corrosion cracking under stresses.
SUBSTANCE: section of pipe line includes bellows, protective gate valves for automatic emergency closing, protective coil and sensors. Protective coil is provided with artificial stress concentrator in form of circular bore whose depth depends on strength of pipe at working pressure. In case of abrupt increase of stresses, circular bore is broken which is indicated by sensors and automatic shut-off system closes the pipe line sending signal to dispatching center.
EFFECT: enhanced reliability of pipe line.
3 cl, 1 dwg
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