31st January, 2019, Thursday: Surge Relief Systems have significant use in oil refineries in applications such as major oil pipelines, sea terminals, tank farms, etc. Usually, all systems where the pressure is stored require a pressure safety relief.

Ignoring this requirement can endanger both the personnel and the equipment itself and can cause severe damage to valuable assets, loss of life and harm the ambient environment.

For example, Pipeline Surge Relief System is intended to relieve pressure surges which occur at times when pumping modes and flow rates vary. Such change can be caused by changes in the position of the valves or switch in the operating methods of the pumps.

The transmission rate of such surge in pressure along the pipeline is very fast. That is why to relieve this pressure in time, special Nitrogen filled axial relief valves with high relief volume capacity and rapid response time are needed. The conventional spring type relief valves can respond to rapidly rising pressures but they tend to instantly shut down once the pressure is relieved locally at a specific point on the pipeline. This causes constant and accelerated closing and opening sequence which severely restrict the valve's capacity to relieve extreme pressure and causes the upstream pressure to climb quickly to high levels, creating a stress on the equipment.

Depending on the required relief flow rate Oil & Gas Systems International (OGSI) provides surge relief systems that can be installed with a single of multiple Surge Relief Valves connected in a parallel arrangement. The configuration of a specific surge relief system is determined after a thorough study by their engineers keeping in mind the transient processes simulation calculations.

All the surge relief systems designed and supplied by OGSI include the essential features like:
- Quick opening – Relief valves react rapidly enough to be able to equalize quickly rising pressure
- Non-Slam capability – valves return to the closed state gradually but fast enough to not relieve any extra volume of fluid from the pipeline system;
- High capacity – Surge relief system will be able to relief fluid at rates equal to the maximum overall flow rate through the pipeline.

About the Company:
Oil and Gas Systems International is a special division, purposed to promote products and services of OGH Group in the markets of the Middle East and Africa as well as to render local after-sales support.