Metering Tank

Metering tank, also known as dump tank or measuring tank,is used for metering crude oil after separation and calibrating metering devices like flow gauges on the separator oil lines in a testing system.It is a nonpressurized vessel, and can also be used for temporarily storing the oil.Since the measuring tank is attached a crude-oil transfer pump, it is convenient to load and transport oil and water.Safety features include flame arrestors on each vent from the tank, a grounding strap, and a shearing roof that opens at 3.45 kPa [0.5 psi] burst pressure in the event the vessel is overpressured accidentally. The grounding strap attached to the tank prevents a static charge buildup.The metering tank is frequently part of the standard equipment for well testing. However, it cannot be used when H2S is present in the effluent because the gas released from the tank is vented into the atmosphere, and that would be hazardous to personnel in the area.