API 607 is a standard issued by the American Petroleum Institute (API) that specifies performance requirements and testing methods for ball and plug valves under fire conditions.
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Technical Requirements of the API 607 Fire Test
| Phase | Requirement / Parameter |
| Standard Name | API 607 (Currently 7th Edition) |
| Burn Duration | 30 Minutes (Continuous exposure) |
| Flame Temperature | 750°C to 1000°C (1400°F to 1800°F) |
| Pressure During Burn | High pressure (typically 75% of max CWP) |
| External Leakage Limit | Strictly limited (measured in ml/min per inch) |
| Post-Burn Cooling | Natural cooling or water quench |
| Operational Test | The valve must be cycled once after cooling |
API 607 vs. API 6FA
| Features | API 607 (General / Mainstream) | API 6FA (Pipeline Focused) |
| Full Name | Fire Test for Soft-Seated Quarter-Turn Valves | Specification for Fire Test for Valves |
| Applicable Valves | Ball, Butterfly, and Plug Valves (Quarter-turn valves) | Gate and Check Valves (Primarily API 6D and 6A designs) |
| Seat Type | Specifically for Soft-Seated (Non-metallic) | Focuses on Metal-Seated or specific API 6D/6A structures |
| Burn Duration | 30 Minutes | 30 Minutes |
| Flame Temperature | 750°C to 1000°C (1400°F to 1800°F) | 750°C to 1000°C (1400°F to 1800°F) |
| Industry Focus | Refining, Petrochemical, Downstream (Process) | Upstream Production, Long-Distance Pipelines (Midstream) |
| Current Edition | 7th Edition | 5th Edition |
Technical Parameters & Testing Logic
| Technical Requirement | API 607 Specifications | API 6FA Specifications |
| Testing Position | Valve closed (Internal pressure at 75% CWP) | Valve closed (Internal pressure at 75% CWP) |
| Cooling Method | Natural Cooling or Water Quench | Natural Cooling |
| Operational Requirement | Must be cycled once and tested for seal after cooling | Must be cycled once and tested for seal after cooling |
| Leakage Calculation | Based on seat circumference (ml/min/in) | Based on seat circumference (ml/min/in) |
| Versatility (Range) | Qualifies a wide range of sizes and pressure classes | Usually a narrower qualification range |
API 607 Valve Application
The valve with API 607 fire certification has a wide range of applications, mainly including the following aspects:
1. Petrochemical industry
The petrochemical industry has high requirements for the safety and corrosion resistance of valves. Valves certified with API607 can be widely used in environments such as refineries and chemical plants to ensure the safe operation of equipment.
2. Natural gas industry
The reliability and fire resistance of valves are highly required in natural gas transportation, storage, and other processes. Valves certified by API607 can effectively ensure the safe operation of natural gas equipment.
3. Gas industry
Gas equipment needs to ensure effective isolation of the fire source in the event of a fire, and valves certified with API607 can play an important role in gas equipment.
4. Other industries
In addition to the above-mentioned industries, environments that require fire safety valves also include various industrial and construction fields such as thermal power plants, heating systems, and fire ventilation systems.
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FAQ
Does API 607 apply to check valves?
API 607 is one of the standard fire safety tests used for valves in the petroleum industry. Developed by the American Petroleum Industry or API, these are the benchmarks a valve can be trusted in an emergency. In such a test, the valve is put through a 30-minute duration.
What is the difference between API 607 and 608?
While both standards are published by the American Petroleum Institute, they serve different purposes: API 607 focuses on fire-safe testing for soft-seated valves used in high-risk environments like oil and gas, whereas API 608 governs the design and performance of metal ball valves under standard operating conditions.