Venting Devices
Venting Devices : A device that is designed to relieve excessive pressure from the vapor space of a container. To accomplish this, the device will be located on the tops of containers above the normal level of liquid of the full tank. Some vents are installed to allow for the venting of the tank during routine operations. Movement of liquid into or out of a container without the space above the liquid level having the ability to breathe will result in damage to the shell. Additional venting capacity is required to keep the internal pressures at a safe level during fire emergencies. The various types of venting devices in use include fusible plugs, spring-loaded relief valves, pop up-type hatch covers, pressure/vacuum vents, and weighted caps
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