The necessity of installing safety valves in containers at atmospheric or negative pressure
Thread Content
Dear experts, as the title suggests, I would appreciate it if you could discuss the necessity of installing safety valves or other safety measures in containers under normal pressure or negative pressure, and whether there are any specific standards or regulations to guide this.
Although safety valves are designed to protect equipment from a safety perspective, when high process requirements exist, safety valves can be installed in containers under normal pressure or negative pressure as needed.
Thank you for your reply. Are there any specific standards or specifications? Could you please provide the standard numbers?
Relevant standards and specifications include API 650-2013 for Welded Oil Storage Tanks, API 620-2013 for the Design and Construction of Large Welded Low-Pressure Storage Tanks, NBT 47003.1-2009 for Welded Steel Atmospheric Pressure Vessels, and SHT 3007-2014 for Design Specifications for Tank Areas in Petrochemical Storage and Transportation Systems
I would like to ask the experts: isn’t it necessary to install a safety valve in a pressure vessel at normal pressure?
The installation of safety valves should be determined through a process analysis of the entire system; if there is a risk of overpressure and the design pressure of the pipes and equipment is lower than the maximum pressure that could occur, then safety valves must be installed
A specific analysis is needed for each specific process, I guess
It then depends on whether the atmospheric pressure tank is at risk of overpressure, or whether you have installed a vent valve, or if it is an atmospheric pressure tank with an open top.
Check whether there is a possibility of overpressure; just as pressure vessels with nitrogen sealing still require emergency breathing manholes
Got it; it mainly depends on the risks involved to decide which safety equipment to use. Thank you!