Trenchless Pipe Repair Process
The in-place pipe restoration process in an economical and efficient alternative to traditional pipe system replacement.
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BETTER THAN NEW
Our proprietary technology allows us to restore aged, corroded piping systems in-place to a “better than new” condition without the use of chemicals or mechanical devices. The epoxy coating applied to the pipes’ interior, seal and protects the system from further deterioration and dramatically extends system life. The process can be used on a variety of pipe material including galvanized steel, cast/black iron, copper and lead.
HOW IT WORKS
The Lowery trenchless pipe repair process is a Nu Flow patented process that uses heated conditioned air to move a non-toxic abrading agent through designated pipe runs and segments. The movement of the agent through the pipe dislodges the corrosion buildup and transports it to an exit opening in the pipe where it is collected in a cyclonic grit unit and secondary dust collection system. The waste corrosion product is non-toxic and easily disposed of without any harm to the environment.
THE PROCESS
STEP 1: PIPE SYSTEM DIAGNOSIS AND SET-UP
The existing pipe system is inspected for integrity and spot repairs on excessively worn joints and fittings are made where necessary. Valves are removed and their locations temporarily fitted with unions and/or couplings which remain through the restoration sequence. Sitting water is drained from the pipe system and the air is introduced into the system to test for leaks. Temporary bypass water piping provisions are installed s necessary.
STEP 2: PIPE-CLEANING
The pipe runs being restored are dried with heated compressed air to remove all moisture. The air medium is then used to distribute an abrading agent throughout the pipe to remove all rust and corrosion products. The removed corrosion material is subsequently gathered into a collection unit. Air is again surged through the pipe to remove any residual debris and dust fines.
STEP 3: PIPE LINING
The cleaned pipe system is re-heated to create an optimal internal pipe surface environment prior to epoxy coating. An air pressure leak test is again performed prior to coating. Conditioned air is then introduced into the pipe uniformly distribute the epoxy lining throughout the pipe segment. Following the coating application, continuous controlled air is sent through the piping to facilitate epoxy curing.
STEP 4: SYSTEM RE-ASSEMBLY AND EVALUATION
After lining has been cured, all removed valves and fittings are returned to their original locations. A final leak test and inspection will be performed. Water quality, volume, and flow are tested. *NU FLOW is the Certified Licensee of American Pipe Lining. Contact us for more information about our epoxies.
THE RESULT
The result is a clean, rust-free polished surface inside the pipe. Following pipe cleaning, a potable water safe, NSF61- certified* liquid epoxy is distributed through the piping using heated controlled air flow to facilitate optimal adhesion and curing. The coating will cure within 12-24 hours, after which time the system is re-assembled and returned to service next day. The result is a smooth and durable finish resistant to further corrosion and deterioration.
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