Problems with valve factory testing
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For die-cast valves, it was found during pressure testing that there was seepage through small holes in the valve body; can it be sent out of the factory after welding repairs? Thank you
The technical specification requires meeting the Class B requirements of MSS sp-55, but it is not clear what those Class B requirements are Can’t understand Standard 55
For those under high pressure, there’s no need for repair welding; even if the standards aren’t known, such components should be discarded directly.
900 LB? That’s equivalent to 15 MP. It shouldn’t be discarded right away
The pressure is quite high; it feels uncertain
With such high pressure, it’s better not to try to repair it – just scrap it
Just scrap it directly. According to what you say, the pores have penetrated the valve body, so it doesn’t meet the requirements. The prerequisite for patch welding is that the depth of the pores must be consistent; these pores can be removed by grinding
The strength of the repaired area does not meet the required standards, so leakage is still possible during use; the risk is too high, and it is recommended to scrap it
This one definitely has to be scrapped. Even if it is repaired and sent out of the factory, it won’t last long – due to insufficient strength, the valve will leak or even explode. It affects customer usage, damages the company’s reputation, and is not worth the cost.
As long as a high-pressure valve has holes in it, it has to be discarded right away. During the pressure testing of the housing, water seeped out gradually, very slowly
For safe production, it’s better to replace it!