Condition Of Our Watermains
Need to clean tuberculation and corrosion deposits out of your drinking water pipes prior to lining? The Tomahawk™ System can help you on your pipeline rehabilitation project.
A corroded and tuberculated potable water pipe. At right, the same pipe cleaned and prepared by the Tomahawk™ System. This pipe is now clean, dry and ready for liner application.
Bitumen and Tar
Need to clean old bitumen and tar lining materials out of your drinking water pipes? The Tomahawk™ System can do it with ease. Bitumen and tar linings were used in potable water pipes to prevent corrosion. These materials are still found in pipes throughout North America.
A bitumen tar and tuberculated potable water pipe. At right, the same pipe cleaned and prepared by the Tomahawk™ System. This pipe is now clean, dry and ready for liner application.
The Tomahawk Solution
Clean Pipe Benefit
- Improves drinking water quality
- Restores hydraulic capacity of pipes
- Lowers operating costs for distribution networks
Advantage – Fast, Dry, Bonded
- Dust-free, environmentally friendly, trenchless process
- Uses little to no water, reducing waste by up to 98%
- Quickly removes tuberculation, biofilms, old bitumen or coal tar linings
- Best-in-class surface preparation for superior bond and long-term, leak-free performance
- Dries the pipe for immediate liner application
- 100mm (4”) to 300mm (12”) diameter pipe
- Clean up to 135m (450 feet)
- Up to 40% tuberculation levels
- One 22.5° elbow per segment
- Meets or exceeds surface preparation and bond requirements for ASTM F3182 for SIPP applications
Tomahawk™ System Cleaning Stages
Tomahawk™ pipe cleaning and preparation timeline
Click on the left icon below for an overview of the Tomahawk pipeline cleaning and preparation process. Click on the right icon below to view a video showing the trenchless street, without service bypass during Tomahawk cleaning.
Final Inspection Video
Click on the icon below for a short pipe and service connection inspection video following Tomahawk cleaning. The white cavities seen in the pipe wall are left behind following the removal of graphitic corrosion during cleaning. This helps to ensure a strong liner bond to the pipe wall. The pipe and service connection are clean, dry and ready to accept liner material.
Why Dry Pipe Cleaning?
- Municipalities are looking for ways to reduce water consumption, especially in more arid regions.
- Less mess and waste onsite, improving public perception.
- Cost savings due to: less water consumption during rehab activities, pipe is dried quickly in preparation for lining, vac truck can stay onsite cleaning pipe all week long without having to dump dry debris.
The Importance of Liner Bond
The video below highlights the importance of a strong bond in preventing future leaks. The arrows represent water pressure in a typical water main. Axial forces are a result of moving water. Positive tangential forces are normal. Negative tangential forces can occur when fighting fires or during transient conditions such as when a water hammer event occurs.
Third party test results have confirmed that the bond between the liner and host pipe wall exceeds the 250 psi bond strength required by the ASTM F3182-16 "Standard Practice for the Application of Spray-Applied Polymeric Liners Inside Pipelines for Potable Water". The pipe wall was cleaned and prepared up to a SSPC-SP 6/NACE No. 3 equivalent surface by Tomahawk™. The original lining material found in the host pipe was coal tar. This makes the results even more impressive due to its tenacity towards removal.
ASTM D4541 - Measuring bond strength of liner material to cleaned and prepared host pipe wall.
For additional information on our Tomahawk™ System such as videos, articles, presentations and brochures, please visit our resources page.