Issuance Of New New National Standard For Top-Entry Fixed Ball Valves: Clarifying Hydrogen Sulfide Corrosion Resistance Grading And Lifespan Testing Criteria

Recently, China officially released a new national standard of head-type fixed ball valves. This standard not only fills the technical gap in the field of valves in China, but also provides safer and more reliable valve solution for high-risk industries such as petroleum and chemical industry. The new national standard clearly defines the grading standard and service life test lifespan testing sulfide (H2S) corrosion resistance, and lays a solid foundation for the technological upgrading and market expansion of domestic valves.
1.Hydrogen Sulfide Corrosion Resistance Grading: Precise Solutions to Complex Conditions
hydrogen sulfide is a common corrosive agent in the petroleum and chemical industries and poses a serious threat to metal equipment, including valves. Hydrogen sulfide corrosion not only degrades equipment performance, but can also cause safety incidents such as leaks and explosions. Therefore, hydrogen sulfide corrosion resistance has become an important index to evaluate valve quality.
The new national standard provides a detailed classification of the corrosion resistance of hydrogen sulfide to thrust into a fixed ball valves. The applicable conditions of valves of different grades in hydrogen sulfide environments, including key parameters such as hydrogen sulfide concentration, temperature, pressure, etc. This classification not only provides a clear basis for design and production of valve manufacturers, but also provides scientific guidance for users to select suitable valves based on actual operation.
For example, in environments with high concentrations of hydrogen sulfide, new national standards require valves to be made of materials with high corrosion resistance, such as special steel grades such as SA516Gr60 (R-HIC). These materials have been specially treated to maintain excellent corrosion resistance in hydrogen sulfide environments, effectively prolong valve service life and reduce maintenance costs. In addition, the new national standard specifies the sealing performance requirements for valves in hydrogen sulfide environments, ensuring that valves maintain good sealing effects under adverse conditions and prevent media leakage.
2.Lifespan Testing Criteria: Ensure Valves Run Stably for a Long Period
In addition hydrogen sulfide corrosion resistance, valve service life is also the focus of user attention. The new GB has set detailed standards for life testing of top-end fixed ball valves, including the number of opening and closing cycles, pressure cycles, temperature cycling cycles and so on.
In terms of the number of opening and closing cycles, the new national standard requires the valve to be continuously opened and closed under simulated operating conditions until the required number of opening and closing cycles is reached or a fault occurs. This test directly reflects the wear resistance and mechanical stability of the valve and provides an important basis for the evaluation of valve service life.
Pressure cycling test simulates the alternation of high and low pressure that the valve may encounter during practical use. By repeatedly applying and releasing pressure, the sealing performance and structural strength of the valve under pressure variations are assessed to ensure that the valve does not fail due to pressure fluctuations during long-term operation.
Temperature cycling testing evaluates valve adaptability to different temperature environments. The thermal expansion and contraction performance of the valve and the temperature resistance of sealing material were evaluated by simulating the alternating conditions of high and low temperature. This test helps to ensure that the valve remains stable under extreme temperature conditions.
3. New national standard promotes Domestic Valves Technological Upgrading and market expansion
The release of the new national standard not only points the direction for the technological upgrading of domestic top-end fixed ball valves, but also provides a strong support for the competitiveness of domestic valve in the international market. With the implementation of the new national standard, domestic valves in hydrogen sulfide corrosion resistance and lifespan testing will reach the international advanced level, to meet the demands of the domestic and international high-end market.
In addition, the release of the new national standard will also promote the domestic valve industry's regulatory development. By establishing clear technical standards and testing requirements, the new GB encourages valve manufacturers to strengthen technological research and development and quality control to improve the overall performance and quality of their products. This will help to improve the reputation and competitiveness of domestic valves in the international market, promoting domestic valve to the world.