B.
manufacturer and approved by the Engineer. Upon request, the Contractor
shall furnish satisfactory written certification that the materials comply with
the manufacturer’s standards and the reference specifications.
General corrosion requirements: The liner shall be fabricated from materials
which, when cured, will be chemically resistant to withstand exposure to
normal sewage effluent.
Resin shall not be affected by ultraviolet light and shall form no excessive
bubbling or wrinkling during lining. Resins shall be tinted for visibility and
provide indication of adequate liner wet-out. Material safety data sheets
(MSDS) for the resin, catalyst, cleaners and repair agents should be submitted
to the Engineer for review.
LINER TUBE
1.
The liner tube shall consist of one or more layers of flexible needled felt or an
equivalent non-woven and/or woven material capable of carrying resin,
withstanding installation pressures and curing temperatures, and compatible
with the resin system used. The liner tube shall be fabricated to a size that
will fit the internal circumference of the existing sewer main. Allowance shall
be made for stretching due to insertion of liner and deterioration of existing
pipe walls.
The minimum liner tube length shall be that deemed necessary by the
Contractor to effectively and continuously span the distance from the inlet to
the outlet of the respective manholes, unless otherwise specified. The
Contractor shall verify the lengths in the field before impregnation and
installation of the tube. Individual insertion mms may be made over one or
more manhole sections as determined in the field by the Contractor and
approved by the Engineer.
Prior to insertion, the liner tube shall be free of all visible tears, holes, cuts,
foreign materials, and other defects.
PART 3 INSTALLATION
3.01 GENERAL
3.02 PRE-INSTALLATION
A.
Prior to installation of the liner, the following activities are required:
a. Receipt and approval of pre-installation submittals.
b. Verification of line condition and any obstructions by video inspection.
2019 CIPP Lining Project CIPP Lining of Existing Sewers (Hot Water or Steam)
Nashua, NH
02650-7
