See other people’s question “How do you choose to deal with this kind of leak? ”
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How do you choose to deal with this kind of leak? This is the actual process of handling a leak in our installation. The leakage part is the lower flange of the safety valve on the top of the carburetor (system P: 6.5MPa, T: 180℃, medium: Hydrogen, DN40 metal ring gasket, 4 M22 bolts). Since the location is 12m away from the ground, the inspection personnel discovered the abnormal noise when they heard the leak and immediately used fire steam to cover it. After inspection, it was found that there was leakage at the interface between the ring gasket and the flange groove, and the ring gasket body was not defective. At the same time, the steam was removed and replaced with nitrogen, because it was found that the leakage increased after the steam heated the bolts. At that time, 3 leakage plugging plans were formulated: 1. Without releasing the pressure, use explosion-proof tools to adjust the bolts directly. The completion time is about 1 hour and the cost is: ￥0.00. 2. Without releasing the pressure, the box is made and filled with sealant. The completion time is about 5 hours and the cost is: ￥3000. 3. System pressure relief, replacement, cooling, adjusting bolts or replacing ring gaskets. The completion time is about 10 hours and the cost is: ￥40000. If you were a manager, which solution would you adopt or are there other ways to plug the leak?
I would choose the third option, which is safe and reliable. It’s hydrogen. No risk is possible.
Yes, 6.5 is not low. For a big factory, 40,000 is a small thing, but safety hazards are a big deal:( :(
The third option should be adopted. :lol :Q
The second option (if feasible) should be chosen for temporary processing and waiting for parking opportunities.
Because there is no defect in the ring pad body, it should be caused by uneven stress on the screws. Generally, under the premise of taking measures (protected by nitrogen), wear a positive pressure respirator and adopt the first option. If you can stop the car, choose 3； If the leakage is small and you can wait for a parking opportunity, choose the second option. Prerequisites for handling abnormal situations: While ensuring safety, take into account production, efficiency, cost, etc. ； You cannot be safe for the sake of safety (Statement: I am responsible for safety, but I believe that to do a good job in safety, all majors must take the initiative in safety. Of course, the safety major must also consider other majors, provided that measures are taken to ensure safety)
Safety first, people are more important than anything else, system pressure relief maintenance
Option 2 is better. Option 1 is too dangerous. Option 3 is unnecessary, and it is best not to cool down the hydrogen equipment and relieve pressure too much, which can easily cause stress corrosion. If option 3 is adopted, it is best to do an air tightness test before using it again, and the heating process needs to be heated.
I don’t know how LZ knew that the metal pad was not damaged. If it can be confirmed, I personally think that the first solution can be used safely and effectively without the need for pressure relief. If the first option is ineffective, the second or third option will be adopted depending on the leakage situation. If the leakage is still large, the third option will be adopted. After all, the amount of loss is not large. If the leakage has been significantly weakened, then the second option will be adopted. Save money if you can. :lol
I choose two, which should eliminate defects, but three consumes too much money.
I chose the second option, which can solve the production problem without spending much money.
I agree with the third option. Although it will have some impact on production and cost 40,000 yuan, it is acceptable. If the first two accidentally cause an explosion, the consequences will be unimaginable, and the risk is not worth taking.
As a manager, you can propose option three, but as a middle-level leader, you will recommend option two and wait for the parking to be processed. Glue injection technology is now very mature
Of course it's the second one. Whenever possible. The first type: When fastening high-temperature and high-pressure equipment and hydrogen equipment leaks online, operators will not be so foolish as to take this risk. The third kind: The shutdown will cause huge losses to the factory. Not only will the device suffer losses, but it will also affect the upstream and downstream devices. The second kind: Although it costs money, it is safer and the loss is smaller.