Is there such a thing?
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Today I saw a welder on site welding a large piece of high-pressure flange to the inner seam of the pipe.； In fact, the inner surface of the connection between the pipe and the flange only needs to be lightly welded. The main thing is to weld the outer connection surface of the pipe and the flange. This is not included. After a while, I came back to look at the flange again. As a result, a large piece of the convex surface was worn away. It really pissed me off. How can I add gaskets in the future? Have you ever encountered this kind of thing when doing projects? You might as well tell me.
Construction quality must be strictly required, especially for high-pressure parts. It is recommended to rework, and the welder will be punished according to regulations and suspended for training.
You did not conduct a technical briefing before welding. 1. The construction personnel should be briefed on technical quality before welding.； 2. Qualified and competent welders should be selected for welding construction.
The work of the workers was so irregular. They only welded the pipes together and didn't care too much.
The original poster is right. The welds on the inner wall are mainly for sealing, preventing rust and impurities from remaining in the gap between the flange and the outer wall of the pipe, making it difficult to blow clean. But what you are talking about is a high-pressure flange. Why would you choose a flat welding flange? Unless it is a small pipe below DN40, then you will generally choose an SO flange, not an ordinary flat flange.
Nowadays, construction teams are basically private owners, and the quality of construction team personnel is very poor. In some state-owned enterprises, the boss of the construction team can be unscrupulous as long as he establishes a relationship with Party A and the boss, and only the on-site construction workers are left to suffer on site. If they find this situation, when they report it, the boss will not talk about the technical skills of the construction team, but also say that you do not care about things at the site, do not report, and only ask them to rework. As for financial penalties, only the boss knows whether they will be implemented in the end. Anyway, no one can say clearly about the relationship between the boss and the boss. Just bear with it, this kind of thing will happen more often in the future, it depends on how you solve it.
There are more projects and more engineering teams, and the quality of construction personnel has also deteriorated, but key things still need to be strictly controlled. . Many engineering companies contract the projects and then subcontract them to some small construction teams, or hire migrant workers on the spot. This kind of thing is not surprising. As a classmate upstairs said, there are many problems that welders who work in construction do not notice when they work in chemical engineering. For example, consider corrosion issues, choose welding rods, consider welding methods, etc. . I once saw on site that the construction team installed the trays in the same direction. It didn't matter what your float valves were for, as long as the bolts could be tightened. It really makes people laugh and cry. .