Quality Inspection of Spiral Welded Steel Pipe

1. From the spiral welded steel pipe looks. In appearance is to pay attention to those welded joints, seen the appearance is not a drawback, there is a lack of scale, which can be seen through the naked eye, of course, detailed and bilateral theory, Borrow a standard model, gauge and magnifying glass to view. Because of the appearance of welding defects, which means the spiral pipe inside most likely also flawed, even the appearance of effort are not done, inside the effort is difficult to ensure.

2. View approach is to use equipment to view, that is, without the risk of pipe to borrow the case of ultrasonic flaw detection, ray detection, penetration testing, and magnetic flaw detection method can see the spiral pipe has not see the defects. In addition to the defective view, the intensity of the pressurized container is also viewed. Usually there are two kinds of water pressure test and air pressure test. Such a view is to see the structural steel pipe weld fineness, usually more accurate to use air pressure view. But the pressure is dangerous to view, if not careful to operate in accordance with the rules will appear security incidents.

Spiral steel pipe also have to see through the cracks, there is no porosity, there is no mixing slag, is not there is no penetration of the place, is not there loose arrangements, usually with oil test, with water test or Water test and other measures. In addition to do still water test, the operation can ensure that the carbon steel pipe without leakage specification.