Prudential Engineering and Design

Engineering and Design

Manifold Design, Line Sizing and Connection Points

Generation 1, 2 and double wall tank farms are equipped with a 3-inch welded-horizontal-multiport flanged manifold. Complete with 3-inch Keystone butterfly valves and cam-lock connections.

The master tank has a total of nine accessible manifold ports including base oil suction, low invert suction and high invert suction in the Gen 2 as well as invert circulation. Other lines include overflow line, base oil fill and invert fill.

Slave tanks have a “T-off” of the invert fill line and invert suction line. These are equipped with threaded ball valves and 3-inch cam-lock connections. This provides the outlets to connect with the master. All systems sit over a 10-foot, 6-inch x 7-inch drip tray working platform. The Generation 1 drip tray is 4-inches in depth and Generation 2 is 6-inches in depth. Drip trays are easily sucked out or drained with a vacuum truck, as they are equipped with removable grating 3-inch lines overall.

Water tanks are equipped with six ports on manifold including a 3-inch welded-horizontal-multiport flanged manifold. This comes complete with 3-inch keystone butterfly valves and cam-lock connections. This tank also has fill line on the front and a down-comer style fill line at the rear of the tank and is also set up with 8-inch and 4-inch flanged ports at the base of the front of the tank (used primarily for fracking) 3-inch lines. There is also a 2-inch schedule 80 flow back line with a diffuser inside.

Onboard Pump Specs

All master and water tanks come standard with T-Series 3-inch Gorman-Rupp self-priming pumps, or Frank Henry 3×3 self-priming pumps, mounted onboard at the front of the tank with bolted tabs. These are 20 hp, 460/480-volt electric Baldor Reliance or WEG explosion proof motors for hazardous locations (Class 1, Zone 1) with and average 13-amp draw.

Single or Double Wall/ Full-Seam Weld on Double Wall Top

All Generation 1 and 2 invert tanks feature a true double wall. The interstitial space capacity is 10% of the overall tank volume. This interstitial space is a sealed full-seam weld that goes right to the roof of the tank. There is no communication between the primary containment and the intestinal compartment unless there is a failure in the primary tank. If this happens our procedures are to empty the tank and take it out of service for cleaning and inspection and a possible repair. If at any time there is fluid in the interstitial space, it is then not deemed secondary containment.

Bottom Design of Tank

Prudential invert tanks are made with a flat floor that slopes to the suction lines and the sump in the front of the tank. The water tanks are built with a rounded floor that also has a slight slope to the front of the tank suction area. Tank Entry Invert tanks are all equipped with ladders and walkways. These come with fall arrest systems on the ladder as well as the walkways.

The water tanks are also equipped with ladders, walkways and fall arrest systems. We include side manway hatches on these tanks.