This standard specifies fire testing requirements and method for confirming the pressure-containing capability of quarter-turn valves with nonmetallic or metallic seat(s) and other operated valves with nonmetallic seating under pressure during and after t
What API 607 means for fire testing of quarter-turn valves
API 607 is the fire test standard for quarter-turn valves and valves equipped with nonmetallic seats. It is widely used in oil and gas, petrochemical, refinery, chemical, and hydrocarbon service applications where valves must maintain pressure-containing capability during and after fire exposure.
It provides fire type-test requirements for quarter-turn valves.
It evaluates valve leakage performance during and after fire exposure.
It supports fire-safe valve qualification for critical process and hydrocarbon systems.
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How API 607 fits into the valve qualification lifecycle
API 607 is used during valve design, material selection, seat design, seal design, prototype testing, certification, procurement, and quality control. It helps confirm that valves with nonmetallic seating can still contain pressure when exposed to fire conditions.
Design stage: define valve type, seat material, seal design, body material, and fire-safe features.
Testing stage: expose the valve to fire test conditions and measure leakage performance.
Certification stage: document fire test results, valve size range, pressure class, and qualified design.
Procurement stage: specify API 607 compliance where fire-safe valve performance is required.
Core building blocks of API 607
Quarter-turn valve: a valve operated by a 90-degree rotation, such as a ball valve or butterfly valve.
Nonmetallic seat: a soft seat material that may be damaged during fire exposure.
Fire exposure: controlled test condition used to evaluate valve performance during fire.
Seat leakage: leakage through the valve closure member during or after the fire test.
External leakage: leakage from body joints, stem seals, glands, or other external pressure boundaries.
Post-fire operation: valve operation and leakage behavior after exposure and cooling.
What API 607 evaluates in practice
Pressure containment: whether the valve body and pressure boundary remain intact during fire exposure.
Seat leakage: whether internal leakage remains within allowed limits.
External leakage: whether stem packing, body joints, and seals control leakage after fire exposure.
Fire-safe design: whether metal backup seating and seal designs support containment after soft seat damage.
Post-test performance: whether the valve can meet required leakage expectations after cooling.
High-value use cases of API 607
Ball valves used in refinery and petrochemical service.
Quarter-turn valves in hydrocarbon processing lines.
Fire-safe valve procurement for critical process systems.
Valve manufacturer qualification and product certification.
Oil and gas project specifications requiring fire-tested valves.
Integration with related valve and fire test standards
API 6FA: fire test standard often used for valves in API 6D pipeline applications.
API 6D: pipeline and piping valves used in petroleum and natural gas industries.
API 598: valve inspection and testing.
ISO 10497: fire type-testing requirements for valves.
ASME B16.34: valves flanged, threaded, and welding end.
How to apply API 607 in a real valve procurement program
Identify valves used in fire-risk service or hydrocarbon applications.
Specify API 607 fire-tested valve requirements in procurement documents.
Review fire test certificates and manufacturer documentation.
Confirm that substitutions do not affect fire-safe qualification.
Common pitfalls and how to avoid them
Assuming all valves are fire-safe: verify API 607 test documentation before acceptance.
Ignoring qualified size range: check whether the tested design covers the purchased size and pressure class.
Changing seat materials: review certification impact when seat or seal materials change.
Confusing API 607 and API 6FA: choose the correct fire test standard for the valve application.
Weak documentation review: request clear test reports, certificates, and traceability records.
Case study: selecting API 607 fire-safe ball valves for a refinery unit
A refinery engineering team needed quarter-turn valves for a hydrocarbon service line. API 607 was used as the fire test requirement to ensure selected ball valves could maintain pressure-containing capability during and after fire exposure.
The procurement team required API 607 fire test certification.
The supplier provided qualified design documentation for the selected valve sizes.
The refinery reduced risk of installing valves without verified fire-safe performance.
Frequently Asked Questions
1. What is API 607?
API 607 is a fire test standard for quarter-turn valves and valves equipped with nonmetallic seats.
2. Where is API 607 used?
It is used in oil and gas, refinery, petrochemical, chemical, and hydrocarbon service applications.
3. What does API 607 test?
It tests valve pressure-containing capability and leakage performance during and after fire exposure.
4. Is API 607 the same as API 6FA?
No. Both relate to valve fire testing, but they apply to different valve applications and project requirements.
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