Engineering & Fabrication

Quadna-designed and fabricated systems can provide turn-key solutions, offering efficiency and cost-savings.

Quadna's packaged systems are designed to accommodate the needs of our clients. We listen to our customers and design & fabricate solutions that are appropriate for the application at hand.

Prison package to Pahrump, Nevada

Detention skid platform

The Quadna Phoenix and Quadna Golden branches teamed up to construct a 11-foot X 33-foot package pump system for the Corrections Company of America (CCA)’s new Nevada Southern Detention Center in Pahrump, Nev. The offsite triplex booster pump package will supply fresh water to the new prison facility currently under construction. The system contains two Goulds 3410 4 x 6-15, 75 horsepower pumps with provisions for a third pump.

Other key features include ITT PumpSmart 100 horsepower PS200 duplex vertical frequency drive (VFD) controllers with provisions for third VFD to be installed in the same cabinet at a later date. The skid will support three pumps with motor bases, 16-inch suction piping, 12-inch bypass piping, 12-inch discharge piping, valves, flow meters, pressure transmitters, the VFDs, a motor control center with automatic transfer switch and a 250-kilowatt diesel generator.

The piping was fabricated in Golden and assembly took place in Phoenix.

PROPANE FREEZE INHIBITOR SYSTEM, WYOMING

Quadna was selected to design and manufacture a propane freeze inhibitor system for one of the globe's leading energy firms. The inhibitor system is designed specifically for pumping pure propane from an outdoor storage tank into a new experimental process. This innovative process is a single-step cryogenic separation process that freezes out and then melts carbon dioxide and removes other components including hydrogen sulfide. The system accommodates a) a low flow and high pressure design, b) frequent cold ambient starts,c) evacuation of vapor in the pumps and piping system prior to high backpressure exposure, d) saturated propane (at boiling point equilibrium), and e) infrequent operation combined with maximum availability. The inhibitor can be described as a two pump system in series operation with a low flow centrifugal type API 610 booster pump and an API 674 compliant reciprocating power pump. Once vented, the system will deliver 1.5 to 15 GPM of propane into the process at pressures up 1,400 psi. The skid also contains pneumatic driven isolation valves for HAZOP approved isolation, PSV’s for safety protection of component overpressure and fire, maintenance free suction pulsation dampener and discharge pulsation dampener. Two locally controlled process loops allow system monitoring and central system control via a PLC panel w/HMI.

Quadna served as system designer, supplier and integrator.

Hydro-Carbon Condensate Transfer System, North Dakota

A comprehensive project management, engineering and operations management firm serving the North American natural gas industry approached Quadna to design, fabricate and supply a hydro-carbon condensate transfer system. The system Quadna designed collects and moves the condensate from the plant system through a pipeline approximately 12 miles long ending at a rail line where the material can be transported efficiently. The system is designed for a low specific gravity, high vapor pressure liquid dictating a low Net Positive Suction Head required (NPSHr) capable system. The pumps have low NPSHr capability while maintaining the ability to handle two phases, both a liquid and gas phase, in case of a system upset during transfer. The 95 gallon per minute, 120 psi, eight stage, radially split segmented pump combines the functionality of a low NPSH first stage impeller with the performance of a side channel design. An explosion proof motor was specified to drive the system and a Variable Frequency Drive (VFD) was installed to provide maximum process flexibility.

Quadna served as system designer, supplier and integrator.

Pump Units Circulate Amine Solution, Dubai

Quadna designed and constructed four pump units for installation at a new natural gas processing facility near Dubai, United Arab Emirates. The units circulate amine solution through a contactor to remove H2S and CO2 from a natural gas stream at pressures up to 1,440 pounds per square inch. The system also includes four, each, FMC Q18 Quintiplex reciprocating pumps with 300 horsepower variable speed motors. The area’s geographical conditions are extremely harsh for machinery because the ambient design is 50 degrees Centigrade (122 Fahrenheit). In addition, there is high humidity and high winds with suspended sand and saltwater spray from the nearby ocean. However, Quadna selected machinery with distinctive features including equipment typically used for offshore coating systems, external lube oil cooler systems, solar shades and upgraded motor bearing seals. The pump skids were built to API 674 standards for long life and continuous duty in a petrochemical service environment.

Quadna served as the system designer and supplier.

NFPA 20 Compliant Fire Suppression System, Arizona

Arizona's first ethanol production facility contacted Quadna to design, integrate and install a fire pump skid for its new facility. Included in the National Fire Protection Association (NFPA) 20, UL and FM compliant fire skid were two, 14” x 10” x 20” (suction x discharge x impeller diameter) ITT-AC 4500 gpm/125 psi, UL-listed and FM-approved fire pumps and the piping, valves, wiring, controllers and an environmental enclosure. The customer selected Quadna because of our ability to design, fabricate, supply, test and commission a complete packaged system.

Quadna served as the system designer, supplier, integrator, installer and commissioner.

Dual Pump Cold Water Pressure System, Arizona

Quadna supplied and constructed a unique dual pump cold water pressure skidded system for a major metropolitan hospital in Phoenix, Ariz. This one-of-a-kind system boosts the cold water supply for the entire hospital, which can experience fluctuating city water pressure as much as 15 to 20 psi. Since the hot and cold water are on separate systems, the difference in pressures was varying 30 to 50 psi throughout the entire hospital system prior to the introduction of the Quadna designed system. Since the installation, the pressure difference has minimized to 20 to 30 psi. These results prompted the hospital facilities team to purchase a second, duplicate system which has reduced the volume even more, to between 5 and 10 psi.

Quadna served as the system designer, supplier, integrator and installer.

Skid-Mounted Custom Valve Matrix, Colorado

A globally recognized integrated energy company approached Quadna in need of water transfer pumps and wound up with a completely skid-mounted custom valve manifold. This custom valve manifold is a result of Quadna’s ability to work closely with clients, listen to their desires and produce a solution. Quadna engineered a compact, automated solution for moving water from well field ponds and water distribution headers.

Quadna served as the system designer, supplier and integrator.

Vapor Recovery Unit, Utah

One of the largest independent oil and natural gas exploration and production companies in the world contacted Quadna to produce a skidded vapor recovery unit (VRU). The main purpose of the VRU system, composed of two scrubbers, a two-stage compressor, an intercooler, make-up gas system for low flows and VFD and instrumentation, is to capture emissions from natural gas processing systems. Found on a natural gas dehydration system, the VRU collects water, unwanted hydrocarbons and BTEX vapors that are stripped out of the gas stream to meet the natural gas distribution system quality specifications. Per EPA standards, Quadna ensured triple-redundancy on the VRU and provided the product on a self-contained skid.

Quadna served as the system designer, supplier, integrator and performed field start-up.

Y-Grade NGL Transfer Skid, Wyoming

A natural gas utility, providing retail natural gas distribution services to more than 800,000 customers in the western U.S., approached Quadna to design a fluid transfer skid to move Y grade NGL, a mixture of ethane, propane, butane, isobutene and natural gasoline, from a bullet tank to a high pressure commercial gas line. Quadna’s transfer skid injects the Y-Grad NGL into a pipeline that moves the product directly to the refineries at 2100 psi, transferring ~2080 barrels of Y-grade a day.

Quadna served as system designer, supplier, integrator and performed field start-up.

Mobile Water injection Skid, Colorado

One of the Rocky Mountain region’s major natural gas producers came to Quadna in search of an innovative solution for a produced water injection application bound for a geologically challenging area. In order to save time and money, Quadna re-engineered and refurbished the client’s existing pumps. The new and refurbished equipment, including a booster pump, filter vessels, control valves and a VFD, provides for monitoring and displaying process variables, allows operator input and enables data logging capabilities for EPA compliance.