Standards for the fire test of valves in China and the United States

The industrial production of petrochemical equipment is the leading industry in the social economy. Its production process is complicated, and most of the raw materials, semi-finished products, and finished products used in the processing are inflammable and explosive chemicals, which are very easy to cause Fire accidents and explosions.

Because the valves used in some fire-prone places have the potential risk of fire accidents, the valves used in such places should be designed with a unique design concept so that the valve still has the necessary requirements after being exposed to the necessary time. The sealing characteristics and actual operating characteristics. In considering the characteristics of the valve's fireproof material, fireproof material experiment is a key method.

At this stage, countries around the world have many specifications for valve fireproof material experiments, and the experimental methods and distinguishing specifications are different. Therefore, learning and training are carried out for each specification, and they have the ability to master the fireproof material experiment regulations of valves and the characteristics of the fireproof materials of the lift The key practical significance.

ISO10497 Valve Test-Fireproof Material Test Regulations for Valves

American API specification:

Fireproof material test of API 607-turn 1/4-week valves and non-metallic high-pressure gate valves

API 6FA Valve Fireproof Material Test Standard

API 6FD product fireproof material test standard

Chinese Standard: JB/T 6899 Valve Fireproof Material Test

1. Application field

ISO10497 standardizes valve fireproof material experiment regulations and valve fireproof material experiment methods, in order to certify the pressure characteristics of the valve after the fireproof material experiment in the whole process of the fireproof material experiment. The specification does not include manual gear transmission or similar sources. The fireproof material experiment of gear transmission outside the mechanical equipment of part of the valve assembly line stipulates that other types of valve gear transmission (such as electric, pneumatic or hydraulic) must be uniquely maintained to ensure that the valve can be tested under the set load. Carrying out actual operation, the large resistance test of this kind of gear transmission is not within the scope of the specification.

2. Common problems

Experiments on valve fireproof materials will generate risks, so life safety is an element to be considered. Due to the structure 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, in order to ensure life safety, appropriate safety devices should be set around the environmental test chamber and other Necessary countermeasures.

3. Basic principles of the test

Put the water-injected pressure-bearing valve at the closed position to carry out fireproof material experiments, and place the valve in a flame with a working temperature of 750°C to 1500°C for 30 minutes. The purpose is to completely surround the valve in the fire area to ensure that the high pressure gate valve and the sealing area are exposed to high ignition temperatures. Record the amount of internal and external leakage during this period of time. After the water cooling of the fireproof material experiment, solve the valve to carry out the hydrostatic pressure experiment to identify the pressure working ability of the valve housing, high-pressure gate valve and hydraulic seal.