SECTION 02650A
SPECIFICATION FOR CURED IN PLACE POINT REPAIR
1. Intent:
It is the intent of this specification to provide for the rehabilitation of sewers by installation of a
resin- impregnated Fiberglas / carbon fiber patch into the existing pipe using an inflatable
element and air / steam pressure. Curing shall be accomplished by either ambient curing or by
steam to cure the resin / fiber glass / carbon fiber cloth to a hard, impermeable corrosion
resistant pipe within a pipe.
2. General:
a. Design:
A cured-in-place pipe installed in a limited portion of a partially deteriorated or damaged
existing underground, nonpressurized pipe designed to support hydraulic, soil and live loads.
b. General Procedures:
The installation of a pipe within a pipe shall be defined as the rehabilitation of an existing
conduit by the installation of a composite material tube (resin-impregnated glass fiber / carbon
fiber composite), which is first formed into a freely overlapping tube from a sheet and is then
pulled into the sewer by a winch.
After insertion, the tube shall be inflated using air pressure, then cured by ambient temperature
or steam to make the said composite material tube into a hard, impermeable pipe. The repair
shall extend a minimum of one foot past either end of the defect.
c. Corrosion Resistance:
The pipe within a pipe shall be fabricated from materials which, when cured, will be able to
withstand internal exposure to sewage gases containing hydrogen sulfide, carbon monoxide,
carbon dioxide, methane, dilute sulfuric acid, and external exposure to soil bacteria and
chemical attack which may be due to materials in the surrounding ground or sewage within.
3. Application:
The application of this process is applicable in the repair of structural defects in pipes 4
to 30 inches in diameter and to repair defects 2 to 50 feet in length. Other sizes of special
requirements may be requested by the Owner's Representative and designed by the licenser
for approval by the Owner's Representative.
4. Reference Specifications:
The design, materials, method of installation, and test method shall be in accordance with
design criteria published by the licenser and supplied to the Engineer.
5. Materials:
a. The tube shall be fabricated from a resin-impregnated glass fiber / carbon fiber sheet
to a size which, when installed, will closely approximate the internal circumference
02650A - 1
