“Expand-in-Place Integration” Technology (EIPI) – The Product

EIPI Technology is a patented methodology for installing fiberglass liners to rehabilitate manholes and pipes in wastewater, stormwater and freshwater systems as well as many industrial situations, depending on the effect that industrial chemicals may have on the resins available to fabricate the fiberglass.

Resinating Fiberglass Expansion Liners, Resinating LLC’s Proprietary Primer, and Resinating LLC’s Proprietary Bonding Agent are the three principle components that are central to EIPI in addition to the many methods and procedures associated with the installation process. These three principle components are described below.

Resinating Fiberglass Expansion Liners

The Resinating Fiberglass Expansion Liner pictured below is one of three critical components that enable Resinating’s EIPI Technology to deliver the most advanced set of benefits available in the industry when a manhole or connecting pipe needs to be rehabilitated.

A Resinating Fiberglass Expansion Liner has a useful life of 100 years or more, and is warrantied not to leak for 20 years.

Unlike a slip liner, the diameter of a Resinating Liner is not constrained by the narrowest part of the pipe it must fit into, nor is it constrained by the need to accommodate exterior collars, both of which limit the flow capacity of a pipe.  Slipliners also offer no additional structural integrity because they are not bonded to the walls of the existing pipe or manhole.

Resinating Liners have no collars and are typically ¼” to ½” thick.  The very low coefficient of friction of a Resinating Liner will likely not only offset any loss in diameter, it may well increase the flow capacity of a rehabilitated pipe.

Resinating Liners at the same time greatly increase the structural integrity of the pipe or manhole they are rehabilitating because they are bonded securely to the existing walls, creating a single, integrated structural unit.

Resinating Liners, typically manufactured as cylinders, are also manufactured in a variety of other shapes — oval, conical, rectangular, elliptical, domed, etc…whatever the shape of the structural unit they are rehabilitating, that’s the shape that we manufacture.  All Resinating Liners are custom designed and manufactured to meet the requirements of each project, be that to renew a pipe or to renew a manhole.

Once manufactured, the Resinating Liner is cut axially so it can be compressed into a smaller diameter and be easily inserted into the structure it is rehabilitating.  Once the walls of the structure have been coated with Resinating’s Proprietary Primer, and then coated with coated with Resinating’s Proprietary Bonding Agent, the Resinating Liner is then expanded and bonded to the walls of that structure, securing it for decades to come.

Resinating Fiberglass Expansion Liners are uniquely manufactured by winding continuous strands of E-Class or better fiberglass, soaked in resin, around a mandril while shooting chop between the layers.  No fillers are used in the manufacture of Resinating Liners. This fabrication process provides Resinating Fiberglass Expansion Liners with an unequaled level of strength compared to all other available rehabilitation options.

Resinating Liners are also impervious to corrosion from the types of chemicals found in waste water and storm sewer systems as well as many industrial situations.  The resin used in manufacturing a pipe is matched to the environment in which it will be used, including high temperature resins and NSF/FDA approved resins for water mains.

As to various other specifications:

  • Resinating Fiberglass Expansion Liners come in diameters ranging from 30” to192” for pipes and manholes.
  • As stated above, Resinating Liners are typically 1/4” to 1/2” thick, but can be thicker, if needed, depending on the need for additional structural strength on a given project.
  • Resinating Liner sections are typically 12’ to 18’ in length.
  • The 18’ section length in not a limitation on the depth of manholes that can be rehabilitated using EIPI Technology…there is no limit on the depth of a manhole that can be rehabilitated using Resinating Fiberglass Expansion Liners and EIPI Technology.

At standard thicknesses and diameters, Resinating Fiberglass Expansion Liners increase the structural strength of a pipe or manhole substantially – 50% to 100% compared to when they were new!  See the Tech Data Page on the Specifications and Tech Data tab for the lab reports on the strength of Resinating Liners.


Resinating’s Proprietary Bonding Agent

The second critical component underlying Resinating’s EIPI Technology is its proprietary polymeric flexible bonding agent.

Whether the Resinating Fiberglass Expansion Liners are being used to rehabilitate a pipe or manhole originally constructed with any substrate – RCP, FRP, VCP, brick, whatever – during the installation process the walls are coated with Resinating’s Proprietary Bonding Agent, preparing the surfaces to receive the expanded Resinating Fiberglass Expansion Liners..

Resinating’s Proprietary Bonding Agent securely bonds the Resinating  Liners to the walls of the existing pipe or manhole, sealing leaks and filling voids, thereby eliminating the continued inflow and infiltration of storm water into sewer systems.  At the same time, it substantially increases the structural integrity of the original structure.

An important property of Resinating’s Proprietary Bonding Agent is its flexibility.  It is not brittle.  It can shift, stretch and move as it encounters various external stresses.


Resinating’s Proprietary Primer

The third critical component that comprises Resinating’s EIPI Technology is Resinating’s Proprietary Primer.  While the most invisible component, it is as critical to the success of Resinating’s EIPI Technology as each of the other two components.

Resinating’s Proprietary Primer enables Resinating’s Proprietary Bonding Agent to adhere to the walls of a manhole or pipe even if they are damp or wet and is an essential component because those walls are always damp or wet.  This polymeric primer is applied to all the surfaces of a pipe or manhole before the bonding agent is applied to enable Resinating’s Bonding Agent to do its job.

The most visible example of why Resinating’s Primer is so important is that it is what enables a new trough to be installed and bonded to the invert at the bottom of a manhole.  After plugging the uphill side of the pipe, Resinating’s Primer is applied to the trough prior to Resinating’s Bonding Agent.  Then the new fiberglass trough is inserted and secured.  Following that process, a new floor is installed in the manhole and the trough is fiberglassed to it and the floor is fiberglassed to the Resinating Liner so there is no possibility of any leakage or chemical fumes getting behind the lining of the rehabilitated manhole.

Resinating Corbels

In the case where a Resinating Fiberglass Expansion Liner is used to renew a manhole, this can normally be done without needing to remove the existing corbel.  In those relatively rare cases where a corbel is required to properly rehabilitate a manhole, a Resinating Corbel is manufactured to complete the job.

Designed and manufactured to fit securely on top of a Resinating Fiberglass Expansion Liner, Resinating Corbel has the strength to support the loads that are placed on the manhole day after day.

Made with the same high-quality fiberglass strands and resin as Resinating Fiberglass Expansion LinerResinating Corbels are designed to last and provide the same benefits as Resinating Fiberglass Expansion Liners.


In Summary

Resinating’s EIPI Technology with its three key components, Resinating Fiberglass Expansion Liners, Resinating’s Proprietary Bonding Agent and Resinating’s Proprietary Primer will provide superior performance, unequaled performance, compared to any other rehabilitation option.  Leakproof and strong, Resinating LLC’s EIPI Technology is The Better Choice.

Resinating Liners, bonded to the surfaces of the manhole or pipe being rehabilitated by Resinating’s Bonding Agent, that bonding being enabled by Resinating’s Primer unite to generate the value that Resinating’s EIPI Technology delivers.

With its 20-year warranty and useful life of 100 years or more, EIPI Technology provides exceptional value in all rehabilitation situations.

Review all the benefits of Resinating’s EIPI Technology on The Better Choice PageIf one compares the capabilities and benefits of Resinating’s EIPI Technology to those of Trench & Replace, CIPP and SIPPthere simply is no comparison!