SISTEMA DI SICUREZZA CONTRO LA SOVRAPRESSIONE

摘要

A pressure surge relief system for a liquid transporting pipeline (12) comprises a surge relief line (14) adapted to be tapped at one end from the pipeline and connected at the other end to a receptacle (26). A valve (16) in the relief line is conditioned to open quickly to substantial flow when the pressure in the line exceeds a predetermined safe limit. Opening of the valve (16) allows that quantity of liquid which is necessary to prevent the pressure from exceeding said predetermined limit to flow to the receptacle (26). The receptacle (26) is pre-charged with a gas to cushion the impact of the surge and also includes a tube (44) with slots (50) to dissipate energy of the liquid surge and to bring the liquid to a state of quiescence as quickly as possible. A return duct (54) allows flow from the receptacle (26) back to the pipeline (12) when the surge subsides.