A brief discussion on the inspection methods of small diameter spiral steel pipes

1. Inspection by physical methods: Physical inspection methods are methods that use some physical phenomena to measure or inspect. The inspection of internal defects in materials or workpieces generally uses non-destructive testing methods. Non-destructive testing includes ultrasonic testing, radiographic testing, penetrant testing, magnetic testing, etc.

2. Judgment from the surface, that is, visual inspection. The appearance inspection of welded joints is a simple and widely used inspection method. It is an important part of finished product inspection. It mainly detects defects on the weld surface and dimensional deviations. Inspection is generally carried out through naked eye observation with the help of tools such as standard templates, gauges and magnifying glasses. If there are defects on the surface of the weld, there may be defects inside the weld.
3. Strength test of pressure vessels: In addition to sealing tests, pressure vessels must also undergo strength tests.
There are two common types: hydraulic pressure test and air pressure test.
They can both test the tightness of welds on vessels and pipes operating under pressure. The air pressure test is more sensitive and faster than the water pressure test. At the same time, the product after the test does not need to be drained, which is especially suitable for products with difficult drainage. But the test is more dangerous than the hydrostatic test. When conducting tests, corresponding safety technical measures must be observed to prevent accidents from occurring during the test.

The above is the inspection method of small diameter spiral steel pipe. In order to ensure the safety of the experiment, professionals need to inspect it in a regular inspection environment to prevent the occurrence of dangerous accidents. The pipes are distributed in the same area and are higher than ordinary submerged arc straight seam welded pipes.