Hydraulically efficient piping meets established drinking water standards
HOBAS centrifugally cast fiberglass pipes and joints have been used for potable water service internationally since 1969. Made of centrifugally cast, fiberglass reinforced, polymer mortar (CCFRPM), the pipe’s high-strength pipe wall, leak-free couplings and hydraulically efficient interior provide long maintenance-free life along with decreased pumping cost. Its inherent corrosion resistance means that even in corrosive soils or electrically charged areas, no cathodic protection is needed.
Tested and Approved
HOBAS Centrifugally Cast Pipe Systems are certified and officially approved for potable water around the globe. HOBAS Pipe USA’s potable water pipes and joint gaskets have been tested by the National Sanitation Foundation (NSF) in Ann Arbor, Mich., and found to meet its Standard Number 61.
Additionally, these pipes are manufactured in accordance with and meet the performance requirements of AWWA C950, Fiberglass Pressure Pipe Standard. The water pipes are suitable for many types of installation including open cut (direct bury), slip lining, jacking or microtunneling, tunnel lining and aboveground. The pipes come in diameters from 18 to 126 inches.
Hydraulically Efficient in New Orleans
The pipes have been used in a number of places. A notable one was an emergency water main replacement in New Orleans. Boh Brothers Construction Co. sliplined 1,000 feet of 36-inch, 125-psi pressure class, 46-psi stiffness class pipe into a 48-inch cast iron line that was nearly 100 years old.
HOBAS pipes are suitable for many types of installation, including open cut (direct bury), slip lining, jacking or microtunneling, tunnel lining and aboveground.
The pipes were assembled with HOBAS gasket-sealed, push-together fiberglass welding coupling (FWC) joints and the new liner passed a three-hour, 100-psi pressure test with no leakage.
Municipalities across the country have an ongoing effort to decrease the operation and maintenance costs of pipelines and preserve infrastructure by using leak free systems. HOBAS potable water pipes deliver significant energy savings due to the low head loss delivered by the smooth pipe interior. With a Hazen-Williams Coefficient of C=155, the calculated loss compared to a rougher concrete pipe or cement lined product can equate to substantial cost savings over the duration of the pipeline’s useful life.
HOBAS Centrifugally Cast Pipe Systems are certified and officially approved for potable water around the globe.
Plant Piping in California
Recently, for a potable water job in California, Overaa Construction of Valley Home, Calif., used HOBAS pipe and fittings for the South San Joaquin Water Treatment Plant Project.
The 20-foot joints were 60 inches in diameter, 50-psi pressure class and 46-psi stiffness class with push-together FWC couplings. Pipes were installed on a 6-inch stable bed, with a gravel embedment to 70 percent of the diameter. They were direct buried with cover depths that ranged from 3.5 feet to about 15 feet, but most of the pipe was installed under 10 feet of cover with HS-20 live load. They are easy to bury because of the reliable performance inherent in their high-stiffness design. The lightweight 20-foot sections further reduce installations costs.
The plant piping required several special fittings, including branch T’s and elbows, which HOBAS custom-fabricated. The plant will provide drinking water for the cities well into the future.
With a long history of success in the U.S. and abroad, CCFRPM pipes will continue to provide performance benefits in water and sewer markets. WW
Circle No. 293 on Reader Service Card