AFT Application Topics
API/ASME/ISO Gas Relief System Piping
American Petroleum Institute (API), American Society of Mechanical Engineers (ASME) and International Organization for Standardization (ISO) - Gas Relief System Piping
- API RP520: Design and Installation of Pressure Relieving Systems in Refineries (recommended practice)
- ASME Boiler and Pressure Vessel Code, Sec. VIII-Non-Mandatory Appendix M
- ISO 4126-9 Safety Devices for Protection Against Excessive Pressure -Mandatory.
- All three standards have different requirements for the inlet piping to the relief valve and the discharge piping. They also can vary depending on the operating conditions, the gas involved, and the type of relief valve used.
