A Durable and Cost-Efficient Option for Sewer and Culvert Rehabilitation
NovaFormTM is a styrene-free, expand-in-place structural liner designed for the rehabilitation of sewers and culverts. This PVC-based structural liner allows municipalities to repair failing infrastructure quickly while respecting the environment. With NovaFormTM, capturing and treating contaminated curing liquid is a thing of the past. As an engineered thermoplastic, it’s installed using steam, and the only jobsite discharge is water.
A Fully Structural Liner
- NovaFormTM combines long-term strength with flexibility, which allows it to handle some of the most challenging conditions
- Once NovaFormTM has been expanded and cooled, it is ready for service. Laterals can be quickly reinstated robotically, and the line can be placed back into service the same day – often only four or five hours from start to finish
- From corroded sanitary sewers to deteriorated corrugated steel pipes in need of structural repair, NovaFormTM PVC Liner is available in sizes 6″ to 30″
- NovaFormTM offers many benefits including time savings, less disruption to local businesses and traffic, and potential cost savings
Inspection Made Easy
Factory made to stringent ASTM F1504 Standards, NovaFormTM leaves the facilities fully manufactured with rigorous QA/QC procedures completed prior to shipping. This allows inspectors to verify the final properties of the liner before it’s installed, rather than cut out coupons for post-installation testing as is required for CIPP. Jobsite inspection is simplified as once the liner is expanded its dimensions are similar to sewer or low-pressure PVC pipe – but with no joints.
This specification covers requirements and test methods for materials, dimensions, workmanship, flattening resistance, impact resistance, pipe stiffness, extrusion quality, marking and packaging.
The pipe shall be made from PVC compound meeting all the requirements for cell classification 12334 as defined in specification D1784 and with minimum flexural modulus properties, tested as per ASTM Method D790, of 320,000psi (2,200MPa).
There shall be no evidence of splitting, cracking or breaking when the rounded pipe is tested according to section 11.3 of ASTM F1504.
Pipe Impact Strength
The impact strength of rounded pipe shall not be less than the values in Table 1 when tested in accordance with test method D2444 as referenced in ASTM F1504.
Table 1: Minimum Impact Strength at 73°F (23°C)
Pipe size, in. (mm) Impact strength, ft-lb f (J)
6 (150) 210 (284)
8 (200) 210 (284)
10 (250) 220 (299)
12 (300) 220 (299)
15 (375) 220 (299)
18 (450) 220 (299)
24 (600) 220 (299)
30 (750) 220 (299)
Values for pipe stiffness for the rounded pipe shall comply with Table 2 when tested in accordance with test method D2412 as referenced in ASTM F1504.
Table 2: Minimum Pipe Stiffness at 5% Deflection
Pipe Size, in. (mm) Pipe Stiffness, psi (kPa)
6 (150) 36 (250)
8 (200) 36 (250)
10 (250) 36 (250)
12 (300) 22 (153)
15 (375) 12 (83)
18 (450) 6 (41)
24 (600) 6 (41)
30 (750) 6 (41)
The extrusion quality of the pipe shall be evaluated by the following test methods:
Acetone Immersion: The pipe shall not flake or disintegrate when tested in accordance with test method D2152 as referenced in ASTM F1504.
Heat Reversion: The extrusion quality of the pipe shall be estimated by heat reversion method in accordance with practice F1057 as referenced in ASTM F1504.
Flexural Properties: The flexural strength and modulus of the pipe shall be tested in accordance with test method D790 as referenced in ASTM F1504.
Rounded Pipe Diameter: The average outside diameter of the formed pipe shall meet requirements in Table 3, +/- 1.0% when tested in accordance with test method D2122 as referenced in ASTM F1504.
Rounded Pipe Wall Thickness: The wall thickness of the formed pipe shall not be less than the values specified in Table 3 when tested in accordance with test method D2122 as referenced in ASTM F1504.
Table 3: Rounded Pipe Dimensions
Nominal Outside Diameter, in. (mm) Minimum Wall Thickness, in. (mm)
6 (150) 0.17 (4.3)
8 (200) 0.23 (5.8)
10 (250) 0.28 (7.3)
12 (300) 0.29 (7.4)
15 (375) 0.30 (7.6)
18 (450) 0.27 (6.8)
24 (600) 0.34 (8.7)
30 (750) 0.43 (10.8)
Workmanship, Finish, and Appearance
The rounded and folded pipes shall be homogeneous throughout and free from visible cracks, holes, foreign inclusions, or other defects. The pipe shall be as uniform as commercially possible in colour, opacity, density and other physical properties.
Pipe shall be clearly marked as follows at intervals of 5ft. (1.5m) or less:
Manufacturer’s name or trademark and code
Nominal outside diameter
The PVC cell classification, for example “12334”
The legend “DR XX FOLDED PVC PIPE”
The designation “Specification ASTM F1504”
Length marker and liner distance label, for example “100FT” (“30.5M”)
The full length of the PVC pipe is coiled onto a reel in a continuous length for storage and shipment. The minimum diameter of the reel drum or core shall be 48in (1,219mm).
When the product is marked with ASTM F1504 designation, the manufacturer affirms that the product was manufactured, inspected, sampled and tested in accordance with the specification and has been found to meet the requirement of it.
Extruded PVC compound
6″ – 30″ diameters (150 mm – 750 mm)
Gravity (non-pressure) applications such as sanitary and storm sewers or culverts