How to check the quality of a fully welded ball valve?
Release Time:
2020-10-05
First, we can test the quality of the buried fully welded ball valve through a strength test. First, we can weld high-pressure caps on both sides of the sleeves of the buried fully welded ball valve. After opening the valve to a 45-degree position, we can inject water into the ball valve through the pressure test valve on the sleeve and increase the pressure to 1.5 times the nominal pressure of the ball valve. Keep the pressure for 15 minutes. If there is no leakage, the ball valve is qualified. Second, we can also test the quality by testing the tightness of the buried fully welded ball valve. The specific operation is as follows: First, close the ball, and then inject nitrogen into the ball valve from the pressure test valve on the sleeve until the pressure rises to 1.1 times the nominal pressure of the ball valve. Then, connect the soft tube of the middle cavity pressure relief valve to the water container for detection, with an insertion depth of 1 cm. If no bubbles are generated within five minutes, the product is qualified.
First, we can test the quality of the buried fully welded ball valve through a strength test. First, we can weld high-pressure caps on both sides of the sleeves of the buried fully welded ball valve. After opening the valve to a 45-degree position, we can inject water into the ball valve through the pressure test valve on the sleeve and increase the pressure to 1.5 times the nominal pressure of the ball valve. After holding the pressure for 15 minutes, if there is no leakage, the ball valve is qualified.
Second, we can also test the quality by testing the tightness of the buried fully welded ball valve. The specific operation is as follows: First, close the ball, then inject nitrogen into the ball valve from the pressure test valve on the sleeve until the pressure rises to 1.1 times the nominal pressure of the ball valve. Then, connect the middle cavity pressure relief valve to a soft tube and connect it to a water-containing container for detection. Insert the tube to a depth of 1 cm. If no bubbles are generated within five minutes, the product is qualified.
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