The importance and testing methods of boiler hydrostatic pressure test

Boiler is an important thermal energy equipment, widely used in industrial production and life. In order to ensure the safe operation of the boiler, hydraulic pressure testing is an essential testing item. Boiler hydrostatic pressure is a strength and sealing test conducted with pressurized water after the boiler is assembled. This article will introduce in detail the testing samples, testing items, testing methods and testing instruments for boiler hydrostatic pressure, as well as their importance.

Boiler testing samples:

The test samples for hydrostatic pressure tests are usually the boiler body and its associated pipes (boiler tubes) and equipment. Before conducting a hydraulic test, the boiler needs to be thoroughly inspected and cleaned to ensure that there are no debris and dirt inside. The most commonly used boiler tube standards in the world include ASTM A106, ASTM A179, ASTM A192, etc.

Boiler testing items:
1. Strength test
The strength test is one of the main items of the hydraulic test, and its purpose is to test the strength and tightness of the boiler. In the strength test, the pressure in the boiler needs to be gradually increased to the specified test pressure and maintained for a certain period of time to observe whether there are leaks, deformations, etc. in the boiler.

2. Rigor test
The tightness test is another important item of the hydraulic test, and its purpose is to test the tightness of the boiler. In the tightness test, it is necessary to maintain the pressure in the boiler at the specified test pressure and observe whether there is leakage in the boiler.

Detection method:

1) Preparation work before hydraulic pressure test
Before conducting a hydraulic test, the following preparations need to be made:
(1) Check the appearance and internal structure of the boiler to ensure that it is intact.
(2) Clean the debris and dirt inside the boiler.
(3) Install the equipment and instruments required for hydraulic pressure testing, such as pressure gauges, water pumps, etc.
(4) Install the safety valve and exhaust valve on the boiler.

2) Steps of hydraulic pressure test
The steps for the hydrostatic test are as follows:
(1) Fill the boiler with water and remove the air.
(2) Start the water pump and gradually increase the pressure in the boiler to the specified test pressure.
(3) Maintain the test pressure for a certain period of time and observe whether the boiler has leakage, deformation, etc.
(4) Slowly reduce the pressure in the boiler until the pressure drops to zero.
(5) Conduct a comprehensive inspection of the boiler to check whether there are leaks, deformations, etc.

Testing equipment:

1. Pressure gauge
The pressure gauge is one of the most commonly used testing instruments in hydraulic pressure testing. Its function is to measure the pressure in the boiler. When conducting hydraulic pressure tests, it is necessary to use a high-precision pressure gauge and calibrate and maintain it regularly.

2. Water pump
The water pump is a device used to fill the boiler with water and increase the pressure during the hydraulic test. When selecting a water pump, you need to select it based on parameters such as the boiler's capacity and test pressure, and ensure that its performance is stable and reliable.

3. Safety valve
The safety valve is a device used to protect the safety of the boiler during hydraulic pressure testing. When conducting a hydrostatic test, it is necessary to install the safety valve and ensure that it performs well.

Conclusion:

The boiler water pressure test is one of the important testing items to ensure the safe operation of the boiler. By conducting a water pressure test on the boiler, its strength and sealing can be tested, potential safety hazards can be discovered and eliminated in a timely manner, and the safe operation of the boiler can be ensured. When conducting hydraulic pressure tests, it is necessary to operate in strict accordance with relevant standards and specifications, and use appropriate testing instruments and equipment to ensure the accuracy and reliability of test results.

Read more: What are boiler tubes and how are they made?