Is it dangerous if a bolt leaks during synthetic cold interconnection under pressurized tightening conditions?

Of course it’s dangerous, as the device operates under high pressure; if the bolts slip, it can easily lead to the release of high-pressure gas, resulting in an explosion or fire. Additionally, static electricity generated by metal collisions can also trigger the ignition of the leaked gas.

It’s too dangerous; tightening bolts under pressure is strictly prohibited, especially with high-pressure equipment.

It’s definitely dangerous; tightening bolts, especially high-pressure bolts, has a very high accident rate

Under no circumstances should you bring tightening bolts, especially at high pressures – it’s too dangerous.

It definitely can’t be tightened. If nothing goes wrong, that’s fine; but if problems arise, it will be a serious issue. Who will take responsibility for that? In our pressure testing, we’re not allowed to tighten the bolts until all the pressure has been released. Once I saw that there was still some pressure remaining and started tightening the bolts anyway; I even scolded the worker for that.

I know that abroad there are people who make a living from this type of work (tightening under pressure or sealing leaks). Last time, a chemical company in Shanghai wanted to carry out operations under pressure, but it didn’t work out because bringing in specialists for such tasks from abroad was too expensive. In fact, the downtime costs resulting from shutdowns for repairs are sometimes far greater than the cost of hiring professionals to carry out the work under pressure! If the cost of shutting down for repairs is 1 million, and the price for performing tightening operations under pressure is 200,000, would the company consider taking the risk?

It’s definitely dangerous; sealing can be carried out under pressure, otherwise the system must be shut down

The view expressed upstairs is not quite correct regarding tightening under pressure in cold environments. I have organized such operations on multiple occasions, and so far no problems have arisen. The procedures are as follows: 1. Obtain the necessary maintenance permits, and have the relevant personnel go to the site. 2. The tools to be used are a copper hammer, a special chisel, as well as a lever and wrenches. 3. Tightening should be done while the component is under pressure; a sledgehammer should not be used, and a lever or copper hammer should be employed for tightening. Prepare the external water for rinsing. 4. If leakage persists, a chiseling method can be used to force the sealant against the leak site, thereby sealing it under the pre-tension of the bolts. Note: The task must be carried out by experienced mechanics

I agree with what was said on floor 11 – things cannot be generalized. Tightening bolts under pressure, including high-pressure bolts, is something that happens from time to time. What’s important is to conduct a thorough risk assessment of the operations and prepare various contingency plans. Both the supervisors and the workers need to have extensive experience in carrying out tasks and in safety management. I am also against working in violation of regulations and taking risky actions. Safety management is not about being bold or fearless; there are only two situations: one is being fearless due to ignorance, and the other is being fearless because of thorough preparation and confidence. Based on this, I approve of those upstairs who are brave, resourceful, and careful, but I do not advocate nor oppose the metaphysical views held by a few individuals; otherwise, tightening things under pressure without meeting the required conditions is what truly leads to accidents... After all, safety comes first!

I am not in favor of this approach. Such an accident just occurred at one of our company’s branch plants: handling a leak in a cold exchange unit while pressure was still present led to a fire and a shutdown of the plant. Fortunately, no spatial explosion took place

One violation that doesn’t result in an accident doesn’t mean that a subsequent violation won’t lead to an accident either. Financial losses can be compensated for, but once an injury accident occurs, it causes greater losses to both families and businesses. During a violation of safety procedures while working on live (high-voltage) circuits, one of our electricians accidentally caused a short circuit with a wrench. It causes severe burns. One must not take chances with any illegal operations.

Be careful; high-voltage equipment should not be handled lightly