Technical Standards and Operational Specifications According to API St 526
This specification defines rigorous industry requirements for the design and supply of steel flanged pressure relief valves. The standard regulates the operational parameters of spring-loaded and pilot-operated pressure relief devices, ensuring industrial safety for critical pipeline system components.
Key regulated parameters include:
- Classification of orifice areas and calculation of effective discharge area;
- Connection flange dimensions and compliance with nominal pressure (PN/Class) at the inlet and outlet;
- Requirements for physical and chemical properties of body materials and internal components;
- Operating temperature ranges and maximum allowable pressure levels;
- Face-to-face dimensions ensuring equipment interchangeability.
EV Group China provides expert support in selecting pressure relief valves in accordance with API St 526. Product marking, nameplate requirements, and stamping procedures strictly comply with the provisions of Annex A of this standard.