Pipe Restoration General Work Sequence
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 air is introduced into the system to
test for leaks. Temporary bypass water piping provisions are installed
as 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 to 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 the lining is cured, all removed valves and fittings are returned
to their original locations. A final leak test and inspection is
performed. Water quality, volume and flow are tested.
