Specifications For Rehabilitating A Pipe With Resinating’s EIPI Technology


Resinating Fiberglass Expansion Liners™ and the related products, which together with the overall installation process received a patent from the US Patent & Trademark Office.  This, Resinating LLC’s EIPI Technology, for the rehabilitation of manholes and pipes can deliver a useful life of 100 years or more and is able to be backed by a  20-year warranty for many reasons, some of which are listed below.

  • The Resinating Fiberglass Expansion Liners are custom manufactured to meet the dimensions of each pipe being renewed.
  • They are manufactured from continuous E-Class or better fiberglass strands coated with a resin tailored to the environment in which they will operate.
  • During the installation process, Resinating’s Proprietary Primer is applied to the walls of the pipe prior to Resinating’s Proprietary Bonding Agent being applied.  This bonding agent will secure the Resinating Liner to the existing walls even in wet conditions, creating a single, integrated, structural unit.
  • The polymers used in Resinating’s Proprietary Bonding Agent to bond the Resinating Fiberglass Expansion Liners to the walls of a manhole after they’ve been primed with Resinating’s Proprietary Primer are also matched to their projected environment.

Other important factors that enable Resinating’s EIPI Technology to offer a 20-year warranty and have a 100+ year useful life for a Project can be grouped into four areas:

  • Accurate pre-planning of a project.
  • Validation of the plan with the customer prior to fabrication.
  • Quality control in the fabrication process.
  • Structured installation process.


The inspection of the existing pipe is the key first critical step in ensuring the long term success of a EIPI installation.

Older pipes vary greatly as to their construction methods, materials used and dimensions as well as other factors.  Since Resinating Fiberglass Expansion Liners are custom made for each pipe rehabilitation project, all the following information must be defined during the planning stage.

  • Dimensions for the diameter and length of the pipe to be renewed and the size of any access point that may exist.
  • The condition of the pipe and the location of any collapses or bends.
  • The shape of the pipe – cylindrical, oval, domed or other?
  • The location of the pipe – in the street or in an area without traffic?
  • The material used to construct the existing pipe – RCP, brick, Truss, PVC, fiberglass with fillers or previously lined pipes?
  • The pipe type – waste water, storm water, industrial or steam, noting any special conditions such as chemical exposure or high temperature ranges.

All of the above factors need to be understood to properly design and specify the correct resins, polymers and methods to be used in the construction and installation of a Resinating Liners using EIPI Technology.

Validation of the Plan

After securing all of the pre-planning information, Resinating LLC will provide, upon request, detailed CAD drawings with written specifications for the project including certification that the pipes can be fabricated in accordance with ASTM D 3753-05 – Standard Specifications for Glass-Fiber-Reinforced Manholes, Liners and Wet wells, latest edition, for the customer’s review and approval.

The plans for the pipe lining will also conform to the following additional requirements:

  1. ASTM D– 790 Flexural Strength (Axial)
  2. ASTM D– 790 Flexural Strength (Transverse)
  3. ASTM D– 695 Compressive Strength (Axial)
  4. ASTM D– 695 Compressive Strength (Transverse)
  5. ASTM D-2412 External Loading by Parallel Loading
  6. ASTM D-2583 Barcol Test

While Resinating Liners for pipes are for the most part pre-designed and engineered, Design Calculations and a Registered Engineer`s stamp are available, if required by the customer.


All Authorized Resinating  Manufacturers (ARM’s) have the demonstrated experience in fabricating products consistent with the specifications of fabricating Resinating Fiberglass Expansion Liners in accord with Resinating LLC’s specifications.

Resinating LLC, working with the ARM, will provide the customer or designated representative with the opportunity witness the manufacturing of Resinating Fiberglass Expansion Liners.

Resinating Fiberglass Expansion Liners are manufactured using continuous E-Class fiberglass strands or better and a premium grade resin suitable for the specific project.   TDS and SDS documents are available for the various roving and resins Resinating uses.

A premium-grade, white, UV-resistant pigment is used throughout the laminate. ABSOLUTELY NO FILLERS are used in the construction of Resinating Liners to ensure a structurally consistent and strengthened laminate.  The appropriate polymeric bonding material will be supplied by Resinating for the installation of the Project.

The laminate shall MEET or EXCEED all structural requirements of ANSI/ASTM D 3753-05, latest addition, Standard Specification for Glass-Fiber-Reinforced liners.

The flexural strength in the Axial direction for ASTM D790 shall far EXCEED the normal specification of 12,000 psi and 18,000 psi in the Transverse direction.

Since the liners are constructed as a SOLID FIBERGLASS LAMINATE, the need for reinforcement ribs is eliminated.  The fabrication method may vary based on the needs of a specific project requirements but will be consistent with the specifications on the specification drawings.

The Resinating Fiberglass Expansion Liners will be sufficiently stiff to resist expected vertical and horizontal external loads when properly installed.  Pipe stiffness factors for the shell shall be in accordance with ANSI/ASTM Standard Specification for Glass-Fiber-Reinforced Liners as specified on the approval documents for the project.  Third party test results are available upon request.

Standard dimensions for Resinating Fiberglass Expansion Liners used in pipes are:

  • Diameter: 30” inches to 16’ feet with larger diameters available.
  • Length per Section: 2 feet to 18 feet.

Since all Resinating Fiberglass Expansion Liners are custom manufactured, they can be fabricated in virtually any size to meet the needs of the customer.

The Resinating Liners will be built in one piece in the shape required for the project unless otherwise specified in the approval documents and cut for compression and insertion into the pipe. Each section of pipe will be bonded to the walls of the existing pipe that is being rehabilitated as well as to each other.

Resinating LLC will furnish test results, upon request, and provide an affidavit certifying that all Resinating Liners meet or exceed the provisions of this document including the requirements of ASTM D3753 and all other applicable ASTM specifications.

Each pipe section will be properly marked and labeled in accordance with the ASTM standard used in the production of the liner. The label shall contain the following information:

  • The ASTM method used, if applicable.
  • The RESINATING LLC Approval Number.
  • The RESINATING LLC Serial Number.


Installation of an EIPI Solution with its Resinating Fiberglass Expansion Liners in a manhole is performed by Resinating LLC itself, as an ARI, or an independent Authorized Resinating Installer (ARI).

Resinating LLC, working with the ARI, will provide the customer or designated representative with the opportunity to witness the installation of the Resinating Fiberglass Expansion Liners using EIPI Technology.

The ARI with the designated representative of the customer will inspect all delivered materials and confirm that they are in good condition.

During the installation process the ARI will use suitable means to lift and set the Resinating Fiberglass Expansion Liners into place for insertion into the existing pipe such that the liners are not subjected to impact loads due to being dropped or being rolled over rocky terrain.

Generally speaking, installation steps include:

  • Addressing all requirements related to safety, working in a confined space, dealing with traffic control, the positioning of barricades and protective equipment for personnel…Safety First.
  • Bypassing or plugging the pipe as needed to stem flow.
  • Pressure washing the existing pipe.
  • Verifying that all voids are identified and field modifications and adjustments are made to correct any unexpected issues that may be discovered while pressure washing the pipe.
  • Double checking all measurements, making adjustments as needed.
  • Digging an insertion point, a short trench a few feet longer than the liner sections to be inserted into the existing pipe to be rehabilitated, unless another access point is available.  Small trenches are also dug at each end of the run of existing pipe being rehabilitated for access by workman if access via manholes is not feasible.
  • Cutting the pipe liners and other fiberglass parts per plans.
  • Compressing the cut liners to fit in the existing pipe to be renewed.
  • Lowering the liner sections to the level of the existing pipe and inserting them in the right and left runs of the pipe to be renewed
  • Applying a primer to the walls of the existing pipe to facilitate adhesion of the bonding agent in spite of dampness.
  • Applying the bonding agent to the walls of the existing pipe.
  • Expanding the liner and pressing it against the walls of the existing pipe.
  • Sealing all seams and joints by fiberglassing them with the same materials used to make the Liners.
  • Cutting ports and injecting bonding material if needed to fill voids.
  • Fiberglassing over the injection ports.
  • Repeating this process for all remaining liner sections.
  • Marking and tagging the pipe liners with required information as indicated above.

Downloadable Pipe Specifications in CSI Format

If you click the link below you will be taken to a .pdf of sample Pipe Specifications in CSI format.

View Pipe CSI Specs

Besides viewing the specifications, if you want, download them using the download button on your browser.

As you will notice, they have a watermark that says “SAMPLE”. If you would like a copy without the watermark, please Contact Us and we will send it to you promptly. We would be happy to work with you on customizing the specifications to suit your particular project.

The Bottom Line

Resinating LLC works within exacting specifications and processes for creating and installing Resinating Fiberglass Expansion Liners in manholes using its EIpI Technology.  As a result, Resinating LLC is able to offer a 20-year warranty while generating significant savings for each customer as they repair and renew their manholes.  It is worthy of noting again that the expected useful life of Resinating Fiberglass Expansion Liners is 100 years+.  Resinating Fiberglass is indestructible.