Specifications For A Pipe Renewal Project

Resinating Fiberglass Expansion Liners™ and their related products earn their 20 year warranty for many reasons specified below.

  • They are manufactured from continuous E-Class fiberglass strands or another method that has comparable strength depending on the specifics of the project being addressed.  The fiberglass is then coated with a resin tailored to the environment in which the Resinating Fiberglass Expansion Liner will operate.
  • The resins used to bond the Resinating Fiberglass Expansion Liners to the walls of the inside of an existing sewer pipe are also matched to their projected environment.
  • The Resinating Fiberglass Expansion Liners are custom manufactured to fit in any pipe design…an important plus.

Other factors that enable Resinating to offer a 20 year warranty on its Patent Pending process and products relate to the way Resinating approaches each Project and the specifications it follows.  The critical steps in the Project Process to ensure the quality that Resinating products deliver 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 and a major step in ensuring the long term success of a Resinating solution.

Older, existing manholes vary greatly as to their construction methods, materials used and dimensions as well as other factors.  Since Resinating Expansion Liners are custom made for each pipe (as they are for each manhole), all the following information must be defined during the planning stage for the renewal of existing pipe.

  • Dimensions for the diameter and length of the pipe to be renewed and the size of any access point that may exist.
  • The shape of the pipe – cylindrical, oval, square, rectangular, dog house 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 Liner.

Validation of the Plan

After securing all of the pre-planning information, Resinating will provide detailed CAD drawings with written specifications for the project including certification that the pipes can be fabricated in accordance with ASTM D 3753-05, latest edition, specifications for the customer’s approval if this is the best design for the project.  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.


Resinating Fiberglass Expansion Liners are manufactured using continuous E-Class fiberglass strands or another method that has comparable strength and a premium grade resin suitable for the specific project.   A premium-grade, white, UV-resistant pigment is used throughout the laminate. ABSOLUTELY NO FILLERS are used in the construction of Resinating’s liners to ensure a structurally consistent and strengthened laminate.  The approved polymeric bonding material will be supplied by Resinating for the project application.

The laminate shall MEET or EXCEED all structural requirements of ANSI/ASTM Standard Specification for Glass-Fiber-Reinforced liners per project specifications.

The flexural strength in the Axial direction for ASTM D790 shall MEET or EXCEED 20,000 psi.

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 stiff enough 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: 8 inches to 15.5 feet with larger diameters available.
  • Length per Section: 2 feet to 18 feet.

However, 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 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 in the field. Each section of pipe will be bonded to the walls of the existing pipe that is being renewed in the field.

Each pipe liner 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 a Resinating Fiberglass Expansion Liner in a pipe is performed by Resinating LLC itself or an Authorized Resinating Installer.

During the installation process it is important to 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.
  • Pressure washing the existing pipe.
  • Double checking all measurements, making adjustments as needed.
  • Cutting the pipe liners and other fiberglass parts per plans.
  • Marking and tagging the pipe liners with required information as  indicated above.
  • Digging a short trench about two feet or so longer than the liner sections to be inserted in the run of existing pipe to be repaired, unless another access point is available.  Small trenches are also dug at each end of the run of existing pipe being repaired.
  • 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.
  • Repeating this process for all remaining liner sections.

There is a slide set documenting the installation of a manhole liner at our website, www.resinatingllc.com under the 1-Day Install tab.

The Bottom Line

Resinating LLC works within exacting specifications and processes for creating and installing Resinating Fiberglass Expansion Liners in existing pipes (and manholes).  As a result, Resinating is proudly able to offer its customers a 20-year warranty while generating significant savings for each customer as they repair and renew their pipes and manholes.