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Industry Terms

Tank & Box Terms

Frac Tank: 21,000-gallon tank for on-site storage of fluids. Also known as: Mobile Storage Tank, Portable Tank.

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Mini-Frac Tank:
 8,400-gallon tank for on-site storage of fluids. Frequently these are roll-off compatible. Also known as: Mobile Storage Tank, Portable Tank.

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Vac Box:
 Usually a 25-yard capacity roll-off container capable of withstanding vacuum for loading of material using a vacuum truck. Also known as: vacuum box, vacuum container, vacuum roll-off, vac, roll-off.

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Sludge Box:
 Usually a 25-yard capacity roll-off container equipped with a gasketed gate for storage and transportation of sludges. Most containers have canvas covers but containers featuring metal lids offer an increased margin of safety. Also known as: roll-off, sludge container, sealed-gate roll-off, sealed-gate sludge box, vapor-tight roll-off, haz box, haz container, haz roll-off, haz roll-off box.

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Dewatering Box:
 Frequently a 25-yard capacity roll-off container equipped with steel mesh screens to facilitate dewatering of sludges, clarification of liquids and phase separation of various compounds. These can be equipped with a gasketed aluminum lid to contain vapors or removable poly cover to facilitate loading and drying. Also known as: phase separator, de-watering container, de-watering box, dewatering roll-off, haz dewatering box.

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Secondary Containment Berm:
 Usually a berm made of polyethylene transported to and erected at a Customer worksite on which other container equipment is placed. Serves to contain incidental spills and accidental releases. Can be used in conjunction with a Frac Tank, Vac Box, Mini-Frac Tank, Sludge Box, Dewatering Box or any kind of Roll-Off Container.

See Spill Containment for Tanks and Containers

Pump Terms

Gallons Per Minute (GPM): Quantity of flow

Head: Pressure or resistance to flow

Static: At rest (vertical distance from surface of liquid to point of free discharge)

Dynamic: In motion (pumping)

Friction Head: Head created by liquid moving through pipes, valves & fittings

C Factor: Co-efficient of friction

Total Dynamic Head (TDH): Static head PLUS friction head

Atmospheric Pressure: Force of the atmosphere (14.7 PSI/29.9 In Hg/33.96 ft of water)

Performance Curve: Manufacturer’s chart showing head vs. flow of a certain pump

Centrifugal Force: The force that pulls an object outward when it is spinning rapidly around its center

Parallel (Multiple) Pumping: Double the flow rate at the same head condition

Series (Staged) Pumping: Double the head at the same flow condition point

Vacuum Assisted Pump: Pump uses external priming system—dry priming

Wet Priming Pump: Pump uses water and internal design of pump to prime

Cavitation: Caused by liquid changing into a vapor and then back to liquid

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