1. Inspection of physical methods: The method of physical testing is to use some physical phenomena to determine or test. The inspection of the internal defects of the materials or workpieces is generally used to use non -destructive detection methods. No damage detection includes ultrasonic detection, ray detection, penetration detection, magnetic detection, etc.
2. Judging from the surface, that is, inspection in appearance. The appearance inspection of the welding joint is a simple and widely used inspection method. It is an important part of the inspection of the finished product. It is mainly to find the defects on the surface of the weld and the deviation of the size. Generally, it is observed by the naked eye, and uses standard models, quantitative regulations and magnifying glasses to test. If there is defects on the surface of the weld, there is a possibility of defects inside the weld.
3. Strong test of pressure containers: In addition to sealing tests, compression containers also need to conduct strength tests.
There are two common hydraulic tests and air pressure tests.
They can test the denseness of the welds and pipelines working under pressure. The air pressure test is more sensitive and speed than the hydraulic test. At the same time, the product does not need drainage treatment after the test, which is particularly applicable to products with difficulty drainage. However, the danger of the test is greater than the hydraulic test. When testing, we must follow the corresponding security technical measures to prevent accidents during the test.
The above is the test method of small -caliber spiral steel pipes. In order to ensure the safety of the experiment, professionals also need to test in the formal inspection environment to prevent dangerous accidents.
