(1) Visual inspection: Before, during, and after re-welding, it is not allowed to produce the following conditions:
A. The welding flange is not flat, too big or too small.
B. The two tubes are not on the same axis.
C. The surface of the weld flange is shiny (representing overheating and excessive cooling stress).
(2) Non-destructive inspection:
A. Connect a metal needle with an electronic pistol to measure the leak point and impurities in the weld.
B. X-ray inspection: All bad conditions can be checked by X-ray.
C. Mechanical and destructive testing:
Hydraulic test: Some welding defects can be tested by hydraulic test.
What is a dense Steel Grating?
The dense steel grating means that the hole shape of the steel grating plate is relatively small and relatively dense, and in addition to the advantages of being beautiful in appearance, easy to install, etc., the steel grating plate more fully satisfies some special occasions for passing through or missing objects. There are strict requirements on size and size. For example, for large crowds of people, dense steel gratings can meet the requirements of high-heeled women's high-heeled shoes; for example, in large-scale industrial and mining enterprises, it is not allowed to have larger objects (such as steel larger than 25 mm in diameter). The ball) falls to meet security needs.
Tight Type Steel Bar Grating, Tight Type Steel Grid, Tight Type Plat Steel Grating
Hebei Zhenxing Jinyuan Wire Mesh Group Co.,Ltd , http://www.zxsteelgrating.com