What's going to happen to the flannel

Answer:

The material does not conform to the chemical composition Bad heat treatment causes poor mechanical performance Three, the processing bad results in the size discrepancy Failure of the workpiece during forging or casting to fill up the bad after processing

The neck slope problem; Always check the form and the size of the groove, or it will be late when the group is right. Certificate of material quality; Domestic manufacturers have to improve their skills in software, and quality certificates are often substandard.

Dimensional problem, the acceptance of flange must be careful; Cover problem: especially ASME flanges are for waterline... A lot of manufacturers forget the water line, and of course many manufacturers don't know to check the project;

The quality of the flanges is mainly in: 1, the mark is unreasonable, according to the standard of domestic or foreign country, the mark on flanges is requested, but many manufacturers cannot do;