FLEX Liner Method and GBA Method for Dealing with Aged PipesThe FLEX Liner Method and GBA Method are two methods which are used for dealing with gas pipes which have been buried for a long period of time. Both methods are environmentally friendly and economical, cutting down on the amount of excavated soil and waste material produced as well as time required.
FLEX Liner Method
The FLEX Liner Method is a method for inserting new PE pipe inside of gas pipes which have been buried for a long period of time aged pipes.
- PE Pipe Insertion Process
After being heated by a pipe warmer, the PE pipe is pulled through the pipe using a winch. During this process, a deformer is used to give the tube a "U" shape.
- PE Pipe Inflation Proces
Steam is used for heating and pressurization of the PE pipe to inflate it to its original shape. Cooling air is then blown through it.
FeaturesThis method renews aged pipes using PE pipes offering superior earthquake and corrosion resistance. Because PE is able to accommodate multiple bent pipes, this method perfoms well when used for gas pipes in a dense and complicated urban environment.
The GBA Method involves spraying liquid resin onto the inner surface of aged pipes to create a resin membrane .
OutlineResin is fed from a resin supply system through a hose and out of a rotary head gun, both of which are pulled along by a hose pulling machine . This resin is sprayed in the form of mist into the inner surface of the gas pipe.
Unlike traditional non-open cut methods, GBA method eliminate excavation of the branch points to cut and reconnect service pipes as a result of lining without blocking up the branch holes.