What happens to valves that fail field tests?
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According to the requirements of GB 50235, 10% of the valves for some fluids can be randomly inspected for shell pressure test and sealing test, and no less than 1 valve can be selected. If the unqualified product is double checked and still unqualified, the batch shall not be used. I would like to ask, if the double spot inspection really fails, what should be done with this batch of valves? Manufacturer returns? Or take it home, pick and choose, and mix it into a new batch.
The second possibility is quite high, specifically those who renovate old valves. We have encountered many of these. In fact, many small units simply do not have the conditions for valve inspection. You won't know until the valve is used. Therefore, many people will encounter leakage just after the valve is installed. It's easy to understand if the packing is leaking. Some valve bodies are leaking.
This depends on the quality control awareness of the manufacturer. If you only want economic benefits, you may lose your own brand.
We have also encountered a manufacturer that randomly inspected 12 units and found that all 12 units were leaking. In the end, they packed them all up and took them away, wondering if they were valves.
2#, no, what is the concept of even leaking in the valve body? It’s a bit stressful but there can’t even be trachoma.……
Valves manufactured by regular enterprises are strictly inspected and there is no possibility of leakage. Unless the test standards are different, they are just sold on the market!
So when purchasing, don’t just look for cheap prices. Cheap is good, but quality still depends on it. Quality and price must be considered twice, otherwise you will be the one who suffers. As for how to deal with it, I think we can take it back and select it one by one. The qualified ones can still be used. As for the unqualified ones, of course they should be recycled. hehe
Return it to the manufacturer and do not use it.
Return to the manufacturer. Here we must condemn those manufacturers that produce unqualified valves. If there are quality problems, they should be returned to the furnace. Once the unqualified valves are used in production, if they are not discovered in time, what a far-reaching impact it will have. You can think about it.
Definitely return it to the manufacturer and exchange it for a new one! If there are many unqualified products, it only means that the products of this manufacturer are not good and you need to choose a suitable manufacturer!
In most cases, after the manufacturer takes it back, it replaces the sealing element and sells it again after passing the pressure test.