At present, there is no effective nondestructive testing method to judge the safety of polyethylene pipeline welding machine. Major domestic polyethylene pipeline manufacturers and large foreign pipeline suppliers have demonstrated the nondestructive testing equipment developed by the United States and South Korea, and the results are not satisfactory. At present, although many domestic enterprises and institutions have conducted research and some have applied for patents, it is still too early to put them into practical application.
The main reason is: 1, and there are many misjudgments. 2. Lack of implementation standards. 3, the operability is small.
I want to hear your opinions.