Leak detection method and system for product lines in fuel dispensing systems

摘要

A leak detection system which operates at relatively high pressures and senses relatively large pressure drops to monitor for leakage in fuel product lines such as those used for dispensing of fuel at gasoline service stations. Leakage tests of various degrees of precision are carried out, and the possible effects of thermally induced expansion and contraction are taken into account. The system also checks for faulty pressure sensors and dry tank conditions. Leak indications are confirmed by a time delay and retesting before a leak alarm is given.