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The production of petrochemical equipment industry is the leading industry in the social economy. Its production process is complex, and most of the raw materials, semi-finished products, and finished products used in the processing process are flammable and explosive chemicals, which are very easy to cause fire accidents and explosions.
Due to the potential risk of fire accidents for valves used in some places prone to fire, unique design concepts should be made for valves used in such places to ensure that the valves still have the necessary sealing characteristics and practical operating characteristics after being subjected to fire for a necessary time. In considering the characteristics of fire resistant materials for valves, fire resistant material testing is a key method.
Currently, countries around the world have many specifications for the testing of fire resistant materials for valves, and the experimental methods and identification specifications vary. Therefore, conducting learning and training on each specification is of key practical significance for mastering the experimental regulations for fire resistant materials for valves and improving the properties of fire resistant materials for valves.
ISO10497 Valve Testing - Requirements for Testing Fireproof Materials for Valves
American API Specification:
API 607 Testing of Fireproof Materials for 1/4 Cycle Valves and High Pressure Gate Valves of Non metallic Materials
API 6FA Test Standard for Fire Retardant Materials for Valves
API 6FD Test Standard for Fireproof Materials for Products
Chinese Standard: JB/T 6899 Fireproof Material Test for Valves
1. Application field
The ISO10497 standard specifies the test requirements for fire resistant materials for valves and the test methods for fire resistant materials for valves to certify the pressure resistance characteristics of valves during and after the fire resistant material test. This specification does not include the test requirements for fire resistant materials for gear drives other than manual gear drives or similar mechanical equipment derived from the valve assembly line, Other types of valve gear drives (such as electric, pneumatic, or hydraulic) must be uniquely maintained to ensure that the actual operation of the valve can be carried out under the set load during the experiment. The resistance test of this type of gear drive is not within the scope of this specification.
2. Frequently Asked Questions
Testing of fire resistant materials for valves can pose risks, so life safety is a factor to consider. Due to the construction of the experimental valve, the experimental equipment, and the experimental level of fireproof materials, the working pressure page may cause dangerous factors to crack. Therefore, to ensure life safety, appropriate safety devices should be installed around the environmental test box and other necessary measures should be taken.
3. Basic principle of test
Carry out a fireproof material experiment with the pressure bearing valve for water injection at the closed position, and place the valve in a flame with a working temperature of 750 ℃~1500 ℃ for 30 minutes. The purpose is to completely enclose the valve in the fire zone to ensure that the high-pressure gate valve and sealing area are exposed to high ignition temperatures. Record the amount of internal and external leakage during this period. After cooling the water for the fire resistant material test, hydrostatic pressure tests are conducted on the valve to identify the pressure bearing capacity of the valve housing, high-pressure gate valve, and hydraulic seals.
