What is API 607?
API 607 is the American Petroleum Institute standard for “Fire Test for Quarter-Turn Valves and Valves Equipped with Nonmetallic Seats.” This certification is critical for valves used in petroleum and petrochemical applications where fire safety is paramount.
Testing Requirements
The API 607 fire test subjects valves to extreme conditions:
- Fire Exposure: 650-750°C for 30 minutes minimum
- External Leakage Test: During fire exposure
- Internal Leakage Test: During and after fire exposure
- Operational Test: Valve must operate after cooling
- Maximum Leakage: 0.5 ml/min per inch of nominal size
Test Procedure Overview
Phase 1: Pre-Test Preparation
The valve is installed in the test fixture with pressure applied. Baseline measurements are recorded to ensure the valve is functioning properly before fire exposure.
Phase 2: Fire Exposure
The valve is enveloped in flames reaching 650-750°C for a minimum of 30 minutes. Thermocouples monitor temperature at critical points including the packing area and seat.
Phase 3: Post-Fire Testing
After fire exposure, the valve is allowed to cool while maintaining pressure. Leakage measurements continue, and the valve must demonstrate operability.
XHVAL API 607 Certified Products
XHVAL triple eccentric butterfly valves carry API 607 certification from Bureau Veritas, featuring:
- Metal-to-metal seating for fire-safe performance
- Graphite packing rated for fire conditions
- Fire-safe gasket materials
- Extended bonnet designs for high-temperature service
When is API 607 Required?
API 607 certification is typically required for:
- Petroleum refineries
- Petrochemical plants
- Offshore platforms
- LNG facilities
- Any application with fire safety regulations
Conclusion
API 607 certification provides assurance that valves will maintain containment during fire emergencies. When specifying valves for hazardous applications, always verify current certification status and ensure the valve configuration matches your specific requirements.