BYPASS PUMPING
Bypass pumping shall usually be made by plugging the upstream manhole and
pumping the sewage into the downstream manhole, or by pumping into an
alternate sewer system of adequate capacity to handle the additional sewage flow.
The pump and bypass lines shall be sized to handle the anticipated flows.
G. MINIMUM THICKNESS
Minimum Liner Thickness unless otherwise specified shall be as follows:
Nominal Pipe Diameter Minimum Thickness
8-inch 45mm
10-inch 6.0 mm
12-inch 6.0 mm
15-inch 7.5mm
> 15-inch <50 SDR
2.04 CHEMICAL RESISTANCE
2.03
(MSDS) for the resin, catalyst, cleaners and repair agents should be submitted
to the Engineer for review.
DESIGN AND PHYSICAL PROPERTIES
A.
THICKNESS DESIGN
PART 2 MATERIALS
2.01 GENERAL
A. CERTIFICATE OF COMPLIANCE
A Certificate of Compliance with these Specifications shall be provided by the
manufacturer for all materials furnished under these specifications.
2.02 MATERIALS
A. LINER TUBE
1.
7. The Contractor installing the Sectional Lining system shall have completed at
least three (3) projects, in the United States, within the past three (3) years and
projects that included CIPP installation lengths of at least 300 continuous
linear feet, on-site wet-out or resin impregnation of the liner tube, and design
of a similarly sized Sectional Liner wall thickness based on a fully deteriorated
condition.
ASTM F 1743: Rehabilitation of Existing Pipelines and Conduits
by Pulled-in-Place Installation of Cured-in-Place
Thermosetting Resin Pipe (CIPP)
* (Note: The Contractor may substitute an alternative method other than by
inversion to install the liner, as approved by the Engineer.
1.03 QUALITY ASSURANCE
A. REQUIREMENTS
1.
SECTION 02650
CURED-IN-PLACE PIPE (CIPP) LINING OF EXISTING SEWERS
PART 1 GENERAL
1.01 DESCRIPTION
A.
SCOPE
3.02 LEAKAGE TESTS:
A. Leakage tests shall be made by the Contractor and observed by the Engineer on each
manhole. The test shall be by vacuum or by water exfiltration as described below:
B. VACUUM TEST:
1. The vacuum test shall be conducted in accordance with ASTM C1244. Test results will
be judged by the length of time it takes for the applied vacuum to drop from 10 inches
of mercury to 9 inches. If the time is less than that listed in Table 1 of ASTM C1244,
the manhole will have failed the test. Test times from Table 1 are excerpted below.
All holes in sections used for handling the sections shall be thoroughly plugged with
mortar. Mortar shall be one part cement to 1-1/2 parts sand, mixed slightly damp to
the touch (just short of "balling"), hammered into the holes until it is dense and an
excess of paste appears on the surface, and then finished smooth and flush with the
adjoining surfaces.
BRICK WORK:
1. Bricks shall be moistened by suitable means, as directed, until they are neither so dry as to
absorb water from the mortar nor so wet as to be slippery when laid.
