Valves are indispensable equipment in industrial production, and their performance directly affects the stability and efficiency of the production process. Regular valve testing can find and solve the problems of the valve in time, ensure the normal operation of the valve, and improve production efficiency.
First, the importance of valve performance testing
1. Ensure safety and reliability: Valves are indispensable control components in liquid and gas pipelines, and undertake important tasks in controlling fluid flow, pressure and direction. Due to the influence of factors such as manufacturing process, materials and design, there are certain risks in the use of valves, such as poor sealing, insufficient strength, poor corrosion resistance, etc. Through performance testing, it can be ensured that the valve can withstand the pressure requirements in the fluid line, and avoid leakage, pollution, accidents and other problems caused by poor sealing, so as to ensure the safe and reliable operation of the system.
2. Improve product quality and market competitiveness: Strict performance testing standards are the basis for ensuring the quality of industrial valve products. Through a series of testing processes, potential problems can be found and solved, and the market competitiveness of products can be enhanced. High standards of testing also ensure that the valve meets a wide range of demanding operating conditions, such as pressure capacity in high-pressure environments, sealing performance in the closed state, and flexible and reliable switching.
3. Preventive maintenance and extended service life: performance testing can evaluate the service life and reliability of the valve, predict its life and failure rate in the process of service, and provide a reference for maintenance. With regular inspection and maintenance, you can extend the life of your valves and reduce production interruptions and repair costs due to valve failures.
4. Comply with standards and regulatory requirements: Valve performance testing needs to comply with relevant international and domestic standards to ensure that products meet safety and quality requirements. Complying with the standard not only helps the product to be certified, but also gains more trust and recognition in the market.
Second, the performance testing content of the valve
1. Appearance and logo inspection
(1) Inspection content: whether there are defects in the appearance of the valve, such as cracks, bubbles, dents, etc.; Check that the logos, nameplates, and finishes meet the requirements. (2) Standards: International standards include API598, ASMEB16.34, ISO 5208, etc.; Chinese standards include GB/T 12224 (general requirements for steel valves), GB/T 12237 (steel ball valves for petroleum, petrochemical and related industries), etc. (3) Testing method: through visual inspection and hand inspection, determine whether there are obvious defects on the surface of the valve, and check whether the identification and nameplate information are correct.
2. Dimensional measurement
(1) Inspection content: Measure the key dimensions of the valve, including the connection port, the length of the valve body, the diameter of the valve stem, etc., to ensure that it meets the requirements of the design drawings and standards. (2) Standards: International standards include ASMEB16.10, ASME B16.5, ISO 5752, etc.; Chinese standards include GB/T 12221 (valve structure length), GB/T 9112 (flange connection size), etc. (3) Testing method: Use calipers, micrometers and other measuring tools to measure the key dimensions of the valve to ensure that it meets the design requirements.
3. Sealing performance test
(1) Static pressure test: apply hydrostatic pressure or static pressure to the valve, and check the leakage after maintaining it for a certain period of time. (2) Low-pressure air tightness test: When the valve is closed, a low-pressure gas is applied to the inside of the valve and the leakage is checked. (3) Housing strength test: apply hydrostatic pressure higher than the working pressure to the valve to test its housing strength and pressure resistance. (4) Stem Strength Test: Evaluate whether the torque or tensile force experienced by the stem during operation is within a safe range.
4. Operational performance test
(1) Opening and closing torque and speed test: test the opening and closing torque, opening and closing speed and operation feel of the valve to ensure smooth operation and within a reasonable torque range. (2) Flow characteristics test: test the flow characteristics of the valve at different openings to evaluate its ability to regulate the fluid.
5. Corrosion resistance test
(1) Evaluation content: evaluate the corrosion resistance of the valve material to the working medium. (2) Standards: International standards include ISO 9227 (salt spray test), ASTM G85, etc. (3) Testing method: The valve is placed in a salt spray test chamber to simulate the corrosive environment and test the durability of the material under corrosive conditions.
6. Durability and reliability test
(1) Repeated opening and closing cycle test: Repeated opening and closing cycles are carried out on the valve to evaluate its durability and reliability in long-term use. (2) Temperature stability test: test the performance stability of the valve under different temperature conditions to ensure its normal operation in extreme temperature environments. (3) Vibration and shock test: Place the valve on a shaking table or impact table to simulate the vibration and shock in the working environment and test the stability and reliability of the valve.
7. Leak detection
(1) Internal leak detection: test the internal sealing performance of the valve in the closed state. (2) External leakage detection: check the external tightness of the valve in use to ensure that there is no medium leakage.
TWS Valve mainly produce resilient seated butterfly valve, including wafer type, lug type, double flange concentric type, double flange eccentric type.
Post time: Jan-07-2025
