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How to check the quality of all welded ball valve?

How to check the quality of all welded ball valve?

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  • Time of issue:2020-10-05
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(Summary description)How to judge the quality of all welded ball valve

First, we can test the quality of buried all welded ball valve through a strength test. First of all, we can weld high-pressure caps on the sleeves of both sides of the valve of the buried all welded ball valve. After the valve is opened to 45 ℃, water is injected into the ball valve through the pressure test valve on the sleeve. The pressure is increased to 1.5 times of the nominal pressure of the ball valve, and the pressure is maintained for 15 minutes. If there is no leakage, then the ball valve is qualified.

Second, we can also test the quality of the buried all welded ball valve by testing its tightness. The specific operations are as follows: first, close the ball, then inject nitrogen into the ball valve through the pressure test valve on the sleeve until the pressure rises to 1.1 times of the nominal pressure of the ball valve, and then connect the middle cavity pressure relief valve to the water container for testing, and the insertion depth is 1cm If no bubble is produced within minutes, the product is qualified.

How to check the quality of all welded ball valve?

(Summary description)How to judge the quality of all welded ball valve

First, we can test the quality of buried all welded ball valve through a strength test. First of all, we can weld high-pressure caps on the sleeves of both sides of the valve of the buried all welded ball valve. After the valve is opened to 45 ℃, water is injected into the ball valve through the pressure test valve on the sleeve. The pressure is increased to 1.5 times of the nominal pressure of the ball valve, and the pressure is maintained for 15 minutes. If there is no leakage, then the ball valve is qualified.

Second, we can also test the quality of the buried all welded ball valve by testing its tightness. The specific operations are as follows: first, close the ball, then inject nitrogen into the ball valve through the pressure test valve on the sleeve until the pressure rises to 1.1 times of the nominal pressure of the ball valve, and then connect the middle cavity pressure relief valve to the water container for testing, and the insertion depth is 1cm If no bubble is produced within minutes, the product is qualified.

  • Categories:Company News
  • Author:
  • Origin:
  • Time of issue:2020-10-05
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Information

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The first trick is to check the quality of the buried fully welded ball valve through a strength test. First of all, we can weld high pressure-duh caps on both sides of the buried fully welded ball valve valve. After the valve is opened to the position of 45 degrees Celsius, then water is injected into the ball valve through the pressure test valve on the sleeve, and the pressure is increased to the nominal value of the ball valve. 1.5 times the pressure, hold the pressure for 15 minutes, if there is no leakage, then the ball valve is qualified.

 

The second trick, we can also check the quality of the buried fully welded ball valve by testing its tightness. The specific operations are 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 the pressure relief valve in the middle cavity is connected to the hose through the water container for testing. The insertion depth is 1cm. If no bubbles are generated within five minutes, the product is qualified.

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