4147.01
PIPE REHABILITATION.
1.
Fabric Tube and Resin. Comply with ASTM F 1216 for heat cure or ASTM F 2019 and D 5813 for UV light cure.
2.
CIPP Lining Dimensions.
internal circumference and length of original pipe.
3.
Structural Requirements.
deteriorated conditions and the following properties for design at each location: Table 4147.01-1: CIPP Main Lining Design Values Design Criteria
Value
Factor of safety, N
2.0
Soil modulus, E's
1000 psi
Soil density, ω
120 lb/ft3
Live load, Ws
H20
Ovality reduction factor, C
As specified for each location
Height of soil above pipe, H
As specified for each location
4147.01
Pipe and Manhole Rehabilitation Materials
Height of water above top of pipe, Hw Long term flexural strength, σL
c.
d.
1/2 depth of cover Use value for 50 year design
Set the long term (50 year extrapolated) creep retention factor at 50% of the initial design flexural modulus as determined by ASTM D 790 unless long term test data according to ASTM D 2990 substantiates a different retention factor. Design for internal pressure or vacuum is not required.
4.
CIPP Lubricant. Provide a non-toxic, oil based product that has no detrimental effects on the tube or boiler and pump system, will not support the growth of bacteria, and will not adversely affect the fluid to be transported.
5.
CIPP End Seal.
Provide a seamlessly molded gasket and retaining ring system complying with ASTM F 3240.
1) Provide a one-piece rubber gasket and a pair of stainless-steel expansion bands in a system manufactured specifically for CIPP end seal applications. 2) Provide bands with positive locking mechanism permanently securing the bands in their expanded position after tightening. 3) Comply with material requirements of ASTM C 923 for rubber gasket and stainless steel.
1.
Utilize a repair system that complies with the following requirements.
ASTM F 2019 and ASTM D 5813.
the inner diameter of the pipe. Ensure one end of the CIPP point repair sheet overlaps the second end by a minimum of 10% to allow for variation in pipe diameter.
stretch to fit irregular pipe sizes.
hardener that cure at ambient temperatures.
to ISO 2577 or ASTM D 6289.
domestic sewage.
2.
Liner Length. Minimum length as specified in the contract documents. Lengths beyond 10 feet may be completed with multiple liners.
Pipe and Manhole Rehabilitation Materials
3.
4147.01
Structural Requirements. Design the CIPP point repair according to the structural requirements for CIPP main lining described herein. Assume an ovality of 2% unless otherwise specified in the contract documents.
1.
Utilize a repair system that provides the following.
extends continuously from the sewer main into the service for the distance specified in the contract documents.
for excavation or access through a clean out.
angles.
continuous, tight fitting, watertight pipe within a pipe that eliminates infiltration and root intrusion between the liner and host pipe.
2.
Liner Length.
length of 12 to 24 inches to seal the connection between the main line and the wye or tee.
12 and 24 inches, as specified in the contract documents, to seal the connection from the main line to the first service pipe joint.
18 inches minimum.
3.
Fabric Tube.
non-woven felt fabric, felt/fiberglass, or fiberglass complying with the requirements of ASTM F 1216 or ASTM F 2019 and ASTM D 5813.
increment as required by the thickness design. Ensure the wet-out fabric tube has a uniform thickness that, when compressed at installation pressures, meets or exceeds the design thickness after cure.
flexible membrane that will contain the resin and facilitate vacuum impregnation.
manufacturer and manufacturing lot or production footage. Ensure print is visible during final CCTV inspection.
4.
Resin.
catalyst system or epoxy resin and catalyst / hardener system that, when cured within the fabric tube, complies with requirements of ASTM F 1216 or ASTM F 2019 and ASTM D 5813.
4147.01
Pipe and Manhole Rehabilitation Materials
b. c. 5.
Method of cure may be by heat source, UV light, or ambient temperature. Provide resin to tube ratio as recommended by the manufacturer.
Structural Requirements.
utilizing the following assumptions, unless otherwise specified in the contract documents: Table 4147.01-2: CIPP Main Service Design Values Design Criteria
Value
Factor of safety, N
2.0
Soil modulus, E's
1000 psi
Soil density, ω
120 lb/ft3
Live load, Ws
H20
Ovality reduction factor, C
2%
Height of soil above pipe, H
As specified for each location
Height of water above top of pipe, Hw
b.
c.
1/2 depth of cover
Set the long term (50 year extrapolated) creep retention factor at 50% of the initial design flexural modulus as determined by ASTM D 790 unless long term test data according to ASTM D 2990 substantiates a different retention factor. Comply with the following minimum structural properties: Table 4147.01-3: Minimum Structural Properties for CIPP Service
d.
Property
Test Method
Minimum Value
Flexural modulus of elasticity
ASTM D 790
250,000 psi
Flexural Strength
ASTM D 790
4500 psi
Do not consider the bond to the existing pipe in determining the structural performance of the lining system.
1.
Grout. Provide a chemical grout (chemical sealing material) complying with ASTM F 2304 or ASTM F 2454.
2.
Additives. Strengthening agents, shrinkage reducers, dyes, viscosity modifiers, gel time modifiers, and freeze/thaw inhibiters, are allowed at the Contractor's discretion. Provide additives compatible with the chemical grout and complying with chemical grout manufacturer's requirements.
Pipe and Manhole Rehabilitation Materials
3.
4147.02
Root Inhibitor. When specified in the contract documents, provide a root deterrent chemical to control root regrowth. Ensure root inhibitor is compatible with chemical grout and additives and complies with grout manufacturer's requirements.
Provide tracer dye complying with NSF/ANSI 60. F.
Pipe Repair Couplings for Spot Repairs by Pipe Replacement. 1.
Style. Full circle, fully lined, bolted.
2.
Length. As recommended by the manufacturer for pipe diameter; 12 inches, minimum.
3.
Materials and Manufacturer.
complying with ASTM A 240, Type 304 stainless steel.
coverage and grid pattern.
4.
Nuts and Bolts. 1/2 inch or 5/8 inch, complying with ASTM A 240, Type 304 stainless steel, Teflon coated threads.
1.
Apply Section 2504.
2.
Use materials for pipe replacement as specified in the contract documents or approved by the Engineer.
4147.02
MANHOLE REHABILITATION.
A.
Rubber Chimney Seal. Apply Article 4149.02, J, for external and internal rubber chimney seals.
B.
Urethane Chimney Seal. 1.
Use only when specified in the contract documents.
2.
Comply with Table 4147.02-1 for the physical properties:
4147.02
Pipe and Manhole Rehabilitation Materials
Table 4147.02-1: Physical Properties Property
ASTM Test Method
Acceptable Value
D 412
800%, minimum
Elongation
C.
D.
Tensile Strength
D 412
1150 psi, minimum
Adhesive Strength
D 903
175 lb/in, minimum
Pressure Resistance
C 1244
2 minutes
In-Situ Manhole Replacement, Cast-in-place Concrete. 1.
Forming System. Provide an internal forming system capable of forming a new and structurally independent manhole wall within the existing manhole, with the specified thickness and conforming to the general shape of the existing manhole.
2.
Concrete. Type I/II Portland cement with 5/8 inch minus coarse aggregate with fiber reinforcement and water reducer, 4000 psi minimum 28 day compressive strength or as approved by the Engineer.
3.
Plastic Liner. When specified, provide a PVC or PE plastic liner resistant to degradation by sulfuric acid. Use a liner capable of being attached to the exterior of the forming system during erection of the forms. Use a plastic liner with a ribbed or studded exterior surface suitable for anchoring to the newly formed interior wall.
4.
Casting. Provide new casting. Apply Article 4149.02, I.
Centrifugally Cast Cementitious Mortar Liner with Epoxy Seal. 1.
Cementitious Lining.
on Portland cement fortified with micro silica. Mixed mortar is to have a paste-like consistency that may be sprayed, cast, pumped, or gravity-flowed into any area 1/2 inch and larger.
Table 4147.02-2: Physical Properties Property Unit Weight
Value 102-130 pcf
Set Time at 70°F ASTM C 403 240 minutes / 480 minutes Initial Set / Final Set Modulus of Elasticity ASTM C 469 24 hours / 28 days
180,000 psi min / 1,150,000 psi min
Sanitary and Storm Sewer Pipe and Structures Materials
4149.01
Flexural Strength ASTM C 293 650 psi min / 800 psi min 24 hours / 28 days Compressive Strength ASTM C 109 3000 psi / 10,000 psi 24 hours / 28 days Tensile Strength ASTM C 307
600 psi
Shear Bond ASTM C 882
>1000 psi
Shrinkage ASTM C 157
None
Chloride Permeability ASTM C 1202
c.
2.
<550 Coulombs
Use a lining containing a liquid admixture for the prevention of micro-biologically induced corrosion.
Corrosion-Resistant Epoxy Lining.
sewer systems.
Table 4147.02-3: Physical Properties Property Value 4-6 hours at 75°F; Dry Time 50% Relative Humidity Compressive Strength ASTM D 695 15,000 psi min Flexural Strength ASTM D 790
11,000 psi min
Tensile Strength ASTM D 638
4500 psi min
Hardness ASTM D 2240
68-90Shore D
Ultimate Elongation ASTM D 638 Adhesion ASTM D 7234
3.
3.5-5.5% Substrate Failure
Casting. Provide new casting. Apply Article 4149.02, I.