Study on Safety Performance of Nitrogen Sealing in Inner Floating Roof Tank
AIChE Spring Meeting and Global Congress on Process Safety
2018
2018 Spring Meeting and 14th Global Congress on Process Safety
Global Congress on Process Safety
GCPS Poster Session
Monday, April 23, 2018 - 5:00pm to 7:00pm
Chattering pilot operated valves may not provide sufficient relieve capacity resulting in overpressure and imposing safety risks to the facility. Lessons learned and providing support in solving these issues is the main focus of this paper.
It is known that relief valve instability and chatter is a dynamic problem which requires an understanding and coupling of the pressure source (e.g. the cryogenic storage tank), the inlet line, the pilot operated pressure relief valve and the discharge line.
This paper presents research results as well as extensive field experience on the insurgence of valve chattering on a dedicated flow test facility with ambient air and gases at cryogenic temperatures.
Best design practice is going to be provided and differences between standard pilot operated relief valves and those using dampening systems will be demonstrated. This new generation of pilot operated valves is less susceptible to chatter and hence reduces potential risk for the protected equipment, the environment and coworkers.