Requirements for fire resistance testing of valves
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Clause 5.1.11.17 of Pressure Piping Code 20801.3 requires that valves using non-metallic materials for sealing the internal components and designed for flammable fluids must meet the fire resistance test requirements. Are there any fire resistance test requirements for butterfly valves? What are the relevant standards?
I’m hearing about this requirement for the first time. How does one go about meeting it? Should a type test be conducted at the time of production, or should it be done on a per-inspection-batch basis?
From what I know, the standards related to the fire resistance testing of valves mainly include API607, ISO10497, and API6FA. API607 specifies the fire test requirements for soft-seated quarter-turn valves; it applies to valves that rotate by 1/4 turn as well as valves with non-metallic seats. For more information, see https://www.doc88.com/p-3317441329649.html. ISO10497 covers the testing requirements for valves in terms of fire resistance. In my understanding, API607 is equivalent to ISO10497; for more details, see https://wenku.baidu.com/view/39dc332eae45b307e87101f69e3143323968f592.html. API6FA also outlines the requirements for fire resistance testing of valves, and it applies to valves that meet standard 6A (the standard for wellhead safety valves). More information can be found at https://max.book118.com/html/2018/1123/8115100046001134.shtm. The requirements specified in API6FA are higher than those in API607; you can check the specific details there. Generally, fire resistance test reports for similar products previously manufactured are provided. If the customer needs it at the same time, more needs to be produced first before it can be done. This is a destructive test, which involves taking it to a third-party facility where it is burned directly using specialized equipment. Hope this can help you
SY/T 6960-2013 \"Valve Testing – Requirements for Fire Resistance Testing\"
Ball valves and butterfly valves with non-metallic seat seals are applicable to API607 (Fire resistance test for valves with 1/4 turn soft seats). Make sure to ask the valve supplier to provide a fire resistance certificate for the valves.