| Potable Water
Pipes Now Available from HOBAS |
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Introduction
Pipes and joints approved for potable water service are now
available from HOBAS Pipe USA, Inc. from our Houston, Texas
manufacturing facility.
Product Construction
HOBAS potable water pipes have a centrifugal cast fiberglass
reinforced polymer mortar wall construction, same as all other
HOBAS pipes, except the final interior layer is epoxy resin in
addition to the normal polyester layer.
Standards and Approval
The HOBAS potable water pipes and joint gaskets have been tested
at and approved by the National Sanitation Foundation (NSF) in Ann
Arbor, Michigan. These pipes are manufactured in accordance with
and meet the performance requirements of AWWA C950, Fiberglass
Pressure Pipe Standard.
Applications
HOBAS potable water pipes are suitable for many types of
installations including open cut (direct bury), sliplining,
jacking & microtunneling, tunnel lining and above ground.
Benefits
HOBAS potable water pipes have the same benefits as other HOBAS
pipes. The key benefits are summarized below:
- Long, maintenance-free life due
to the non-metallic construction which results in inherent
corrosion resistance without add-on coatings, polybag
encasement or cathodic protection.
- Leak-free, quick assembly,
gasket-sealed, push-together joints.
- Significant energy savings due
to the low head loss experienced from the smooth I.D.
(Hazen-Williams C = 155).
- Easy to bury with predictable
and reliable performance because of the high stiffness design.
- Low cost installation due to the
lightweight, yet rugged, 20 foot sections and push-together
joints (no welding or chemicals required).
- Easy field length adjustments
since the gasket-sealed coupling joints seal anywhere along
the natural pipe O.D. surface with no calibration required.
- Product Line
- Diameters - 18" to
110" currently available
- Pressure Classes - 50, 100, 150,
200 & 250 psi standard, although in-between values are
routinely available
- Stiffness Classes - 36, 46 &
72 psi standard, although others, in-between and higher, are
available
- Section Lengths - 20 foot
standard and even divisions are routinely available
Joints
The standard joint is the HOBAS FWC fiberglass, gasket-sealed,
unrestrained (not tied) coupling that features leak-free
performance, push-together assembly and easy field length
adjustments. The FWC coupling seals anywhere along the natural
pipe O.D. surface with no calibration required. A flush version
(same O.D. as the pipe) is available for jacking and tight fit
reline applications. For more details see section 8 of the HOBAS
Product Brochure.
Fittings and Taps
A wide variety of mitered and molded fittings is available
including elbows, tees, reducers, flanges, wyes, laterals, nozzles
and bushings. Outlets can be made using full sleeve tapping
saddles. All of these items are not available for all pressure
classes and diameters. Please inquire for specific capabilities
suitable for your project conditions. Additionally, HOBAS pipes
are dimensionally compatible with ductile iron pipes from 18"
to 48" and have been used with ductile iron push-on and
mechanical joints in these sizes. Steel fittings with appropriate
corrosion protection may also be used.
Design
The buried design procedure is given in Chapter 5 of the AWWA
Fiberglass Pipe Design Manual, M45. Additional considerations
apply for other installation methods. HOBAS Pipe USA can provide
design calculations to demonstrate the performance of our pipes in
specific conditions on individual projects. This service is
available upon request when the pipeline operating conditions are
known.
Testing
Standard quality control tests are defined in AWWA C950. However,
it is not standard to factory hydrotest HOBAS pressure pipes due
to their seamless, solid wall, non-porous, monolithic cast
construction which has proven to have the highest leak-free
reliability, not only in the factory, but also after installation.
Hydraulics
In service flow tests conducted by users have determined the
Hazen-Williams flow coefficient for HOBAS pipes to be 155. The
resulting lower head loss requires less pump horsepower. This
reduces initial capital costs and leads to very significant
savings in pumping energy consumption. Please contact us regarding
an evaluation for your system.
Installation
Installation requirements and suggestions are detailed in the
HOBAS Product Brochure in section 14 and are consistent for all
HOBAS pressure pipes. Note that unbalanced hydrodynamic forces at
changes in line direction must be externally restrained by thrust
blocks or other suitable means. Some fittings, such as tees, wyes
and laterals, may require full encasement in reinforced concrete.
Please inquire regarding specifics for your particular
application.
Conclusion
HOBAS Pipe USA, Inc. now has pipe and joints that have received
NSF approval for potable water service. Therefore, you can now
enjoy the many cost saving benefits of HOBAS pressure pipes in
your water transmission systems too! Contact your HOBAS sales
representative today for assistance or a quotation.
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| 2008 Upcoming Tradeshows |
| SHOW |
DATE |
BOOTH |
ACE
08
Atlanta, GA |
Jun
8 - 12 |
116 |
ASCE
Atlanta, GA |
July 22-24 |
TBD |
APWA
New Orleans, LA |
Aug, 17-19 |
1510 |
WEFTEC 08
Chicago, IL |
Oct. 18-22 |
23003 |
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