What are the inspection methods for large diameter flange quality?

The large-caliber flange is one of the flanges, which is widely used and implemented in the sewage treatment profession, and is well received and loved by users. So what are the inspection methods for the quality of large diameter flanges?
The inspection method of large diameter flange quality is as follows:
1. Eye view. See if there are cracks or gaps on the surface of the large diameter flange. Use equipment to detect. As for the internal defects, we will check whether the large diameter flange exists by low-power inspection, fracture inspection and high-power inspection.
2. Chemical composition analysis. In the use of the process of its stress, importance, working conditions are different, its materials and metallurgical process is also different, according to different raw materials, we can check according to different chemical reagents.
3. Sealing surface of large diameter flange can be made into lubrication type, concave and convex type and tenon groove type. Butt welding steel flange for flange and pipe butt welding, mainly used in welding skills.
The large-caliber flange is one of the flanges, widely used and promoted in the machinery industry, wind power industry and sewage treatment industry, and has been praised and favored by users. When we check the quality of large-caliber flanges, we can check our large-caliber flanges according to the above inspection method.