How to conduct air tightness test?Frequently Asked Questions and Solutions

Air tightness testing is a key quality inspection method widely used in industries such as electronics, automotive and aerospace.The main purpose is to test the sealing performance of the product to ensure that it will not fail due to gas leakage during actual use.In this article, we will introduce in detail the process of air tightness testing and solutions to common problems to help you better control product quality and improve production efficiency.

As a leading brand of air tightness testing equipment, Hirays has been committed to providing high-precision and high-reliability testing equipment.Through this article, you will learn how to effectively conduct air tightness testing to improve the safety and reliability of your products, and you will also find solutions to common problems.

1. Basic principles and steps of air tightness testing

The basic principle of air tightness testing is to determine whether there is leakage by detecting changes in air pressure inside or outside the product.Usually the pressure difference method or flow method is used.Among them, the differential pressure method measures leakage through pressure attenuation, while the flow method directly measures the air flow through the object being measured.

Generally speaking, the steps of air tightness testing include the following processes:

• Preparation:Select appropriate test equipment, ensure its calibration is accurate, and determine the specific parameters of the test based on the characteristics of the object being tested.
• Connecting pipeline:Connect the object to be measured and the test equipment through pipelines, ensuring that the connection is well sealed.
• Apply pressure:Apply a specific pressure to the object being tested according to the test standard and maintain it for a period of time.
• Measuring leakage:Determine if a leak is present by detecting pressure changes or directly measuring air flow.

2. Frequently asked questions 1: Test results are unstable

In air tightness testing, unstable test results are a common problem.This can be due to a variety of reasons, including inaccurate equipment calibration, changes in ambient temperature, loose pipe connections, etc.To resolve this issue, you can take the following steps:

• Regular calibration:Make sure test equipment is regularly calibrated to ensure accurate measurements.
• Keep the environment stable:When testing, try to conduct it in an environment with stable temperature and humidity to avoid interference from external factors.
• Check connection: Before each test, check whether the pipeline connection is firm and ensure there are no leaks.

3. Frequently Asked Questions 2: Testing takes too long

Testing for too long will lead to inefficiency, which is a problem that many companies encounter in actual operations.To shorten testing time, you can try the following:

• Optimize test program:According to the characteristics of the object being tested, select reasonable test methods and parameters to avoid too long test cycles.
• Use efficient equipment:Use high-precision, high-efficiency air tightness testing equipment to further shorten testing time.
• Parallel testing:If conditions permit, air tightness testing can be performed on multiple products at the same time to improve overall testing efficiency.

4. Frequently asked questions 3: Test accuracy is not high

Low test accuracy will directly affect the reliability of the test results.In order to solve this problem, you can start from the following aspects:

• Choose the right equipment:Select appropriate air tightness testing equipment according to the testing requirements to ensure that the accuracy of the equipment meets the requirements.
• Improve the operation process:Develop detailed operating procedures to ensure that each step is performed in accordance with standard specifications.
• Learning and training:Provide training to operators to improve their professional knowledge and operating skills to ensure the accuracy of the testing process.

5. Frequently Asked Questions 4: Unable to locate the leak point

In air tightness testing, determining the location of the leak point is a key issue.The following methods can help find leaks faster:

• Sectional test:The object to be tested is tested in sections and the leakage area is determined by comparing the results of each section.
• Use tracer gas:Introduce tracer gas (such as helium) into the object to be measured, and use special detection equipment to find the leak point.
• Apply foam solution:Apply foam liquid on the surface of the object to be measured, and determine the leak point by observing the location of the bubbles.

6. Frequently Asked Questions 5: Equipment Maintenance and Maintenance

Regular maintenance and upkeep of equipment is critical to maintaining the reliability of air tightness testing.Here are some basic maintenance recommendations:

• Regular inspection and cleaning:Regularly check the condition of all parts of the equipment and clean them.
• Replace wearing parts:Regularly replace wearing parts in the equipment to avoid measurement errors caused by aging of components.
• Record maintenance status:Establish equipment maintenance files and record each maintenance situation in detail so that you can know the status of the equipment at any time.

in conclusion

With proper air tightness testing methods and solutions to common problems, you can significantly improve the quality and reliability of your product.The Hirays brand has been committed to providing customers with high-quality air tightness testing equipment to meet the needs of different industrial fields.I hope this article can help you better understand the process of air tightness testing and effectively solve the problems encountered in actual operations.If you have any questions or need further technical support, please feel free to contact us.