**Safety valves** are critical components in pressure systems, designed to prevent overpressure conditions that could lead to equipment failure or hazardous situations. Here’s how they are defined under **ASME Section VIII**, **API 520**, and **API 526**:
**ASME Section VIII
- Covers the design, construction, and testing of pressure vessels.
- Specifies requirements for pressure relief devices, including safety valves.
- Defines set pressure, blowdown, and capacity** criteria for proper valve operation.
**API 520
- Provides guidelines for sizing, selection, and installation of pressure-relieving devices.
- Covers inlet and outlet pressure losses, ensuring efficient valve performance.
- Defines reaction forces and discharge piping considerations.
**API 526
- Standardizes dimensions and capacities for safety valves.
- Ensures interchangeability of valves across different manufacturers.
- Defines orifice sizes, pressure ratings, and material specifications.
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