How much do we know about the hazards associated with gate valves in refineries?
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I’ve heard of cases where the gland on a regular gate valve flew off and killed someone. Please discuss the potential dangers in refineries that are easily overlooked During normal production, when adjusting the manual valve manually, do not use a valve wrench to strike the valve body or other parts of the valve.
With the right selection and proper use, there will be no problems. . . Problems with valves arise due to the quality of the valves, as well as during risky operations such as removing or replacing the gasket while the valve is under pressure. . . As for the failure of bolts due to excessive use of the valve, this also falls under usage-related issues. . . :lol
Gate valves are generally selected with a pressure rating higher than the operating pressure, so problems occur less frequently. Be careful to turn the wheel back one full turn when fully opened; pay attention to this also when opening it.
Attention should be paid to the proper way of operating valves; they should be turned using a sideways position, especially high-pressure valves. Additionally, the valves should be inspected during maintenance
The gland of a regular valve can’t just fly out and kill someone, right? Maybe it’s because of adding packing under pressure or some other operation? Surely the horse rack was removed, right? That’s possible indeed! I’ve heard from colleagues that the shaft of a pump once came loose and punched through a wall, but no one was injured; this guy still considers himself lucky to have escaped unharmed!
It must be caused by overpressure in the valve; this usually does not occur under normal circumstances. Within the equipment management system, it is essential to ensure that the pressure rating of the valves matches that of the pipes. Operators need to conduct thorough risk analyses, that is, risk identification – even minor issues can lead to serious consequences. Careful operation is therefore highly recommended
I’ve only seen pneumatic valve stems fly out and injure people; I’ve never heard of gate valve gland caps causing injuries
As long as the right material is chosen and the operating temperature and pressure are within normal ranges, there should be no problems if the valve cover is repaired with all the threads in place
The dangers associated with gate valves cannot be ignored. In chemical plants, gate valves are likely to be one of the most commonly used valves, which means the likelihood of accidents is also higher. It is important to pay attention to their maintenance on a regular basis, to report any missing parts promptly, and to lubricate the gate valves frequently in order to prevent rust； 2. During operation, be careful to apply even force; it is best not to use the switch hook to strike the handwheel ； In particular, when replacing valves, packing, and gaskets, it is necessary to ensure that the pressure has been completely released ； 3. Being familiar with the hazards of the media in the pipelines enhances work safety ；