Safety considerations during the use of Tanggu valve
In the piping planning and equipment of Tanggu one valve, it is necessary to consider the following problems and solutions:
Tanggu A valve can leak, whether at the beginning of use or in the process of use, in the stuffing box cover, flange gasket may be damaged in Tanggu a valve may leak. It is conceivable that such leaks will develop. If the liquid flows through the Tanggu valve under very strict operating conditions (high temperature and high pressure), what kind of damage might it encounter? Do corrosive fluids collect in cable grooves and flammable liquids fall into hot containers? Will the warm current of alkaline solution not damage the operator?
After the closure, Tanggu one valve can maintain the system pressure for a continuous time. If the Tanggu valve is to be opened or taken away when it is repaired, it is necessary to have a safe way to reduce this pressure. It is also necessary to have means of discharging accumulated harmful liquids.
When planning the Tanggu valve system, the following needs should be considered:
1 control valve sealing planning. The single seat valve can achieve a leakage rate of less than 1 drop per hour. Double seat valves are difficult to close tightly on both seats. Therefore, it is necessary to consider the possibility of changing to a single seat valve.
2. A lot of high pressure fluid accumulated between the blocking valve may have considerable force. If the pressure of the control valve is discharged recklessly, serious personal accidents may occur.
3. Is the fluid a gas, a clean liquid or a liquid with suspended solids?
Is a good Tanggu valve planning, blocking can not prevent the accumulation of high pressure liquid. Therefore, it is suggested that if the potential energy of a few words of liquid has a great risk, in each side of the control valve equipment vent valve and discharge valve.
For the accumulation of a valve with a lot of high pressure materials, consider the equipment of two vent valves and discharge valves reasonable. Only a small amount of material is accumulated between the two Tanggu valves, and the pressure of the system can be gradually released, so that the fluid pressure between the two discharge or vent valves is repeatedly collected and discharged. Note that in this process the control valve is necessary to open the state.
If the fluid being discharged is a risky gas, it is necessary to connect the vent line to a safe place.
If the gas is not combustible, it is still necessary to export the blowout pipeline to prevent the blown gas from entrained with rust or other substances, which may damage the personnel who are handling the blowout valve.
Select a vent valve that is continuously THROttled to protect careless operators who fail to follow the safe practice of slowly opening the vent valve. If the fluid contains suspended particles, the air valve is prone to blockage. Therefore, it may be necessary to empty the Tanggu valve at the top of the pipeline from which equipment, so that the use of large size discharge valve, to achieve safe emptying. In this regard, it is very important to train the personnel to operate safely on the air valve. If the discharge is a risky fluid, the pipeline planner should consider connecting the discharge line to a safe location. During the operation of the equipment, the Tanggu valve may be very hot, so it is necessary to have preventive measures to avoid scalding the operator.