State of Technology Report for Force Main Rehabilitation, Final ...

from material taken from the fabric tube along with the resin/catalyst system and cured in a clamped
mold. Since the glass fiber material can be bi-axial, samples are marked to designate the axial and
circumferential direction. Testing includes short-term flexural and tensile properties. The minimum
acceptable properties under this standard are shown in Table 5-15.
Table 5-15. Minimum Structural Properties of CIPP Products by ASTM F2019
Property Test Method
Minimum Value
psi
Flexural Strength D790 6,500
Flexural Modulus D790 725,000
Tensile Strength D638 or D3039 9,000
In addition, wall thickness measurements are made (with no point measurement to be less than 85% of the
average design specified thickness) and a CCTV internal inspection is completed. As F2019 covers
pressure applications, a pressure and leak tightness hydrostatic pressure test is included with a
recommended test pressure of twice the working pressure or working pressure plus 50 psi, whichever is
less. Allowable leakage is 20 gallon/inch diameter/mile/day.
5.6 QA/QC Requirements
Few rehabilitation products are destined specifically for use in a sewer force main. Consequently, most of
the QC requirements in the ASTM and AWWA standards pertain to either use in a gravity sewer or a
pressure water main. None, except ASTM D3754, which covers fiberglass pipe for sewer and industrial
pressure pipe, combines the corrosion resistance necessitated by the sewer effluent and the long-term
tensile strength of a pressurized main. As more rehabilitation work is undertaken in the field of sewer
force mains, new standards or revisions to existing standards should follow to reflect this unique
application and need.
QC is a procedure or set of procedures intended to ensure that a manufactured product or performed
service adheres to a defined set of quality criteria or meets the requirements of the client or customer. QA
is defined as a procedure or set of procedures intended to ensure that a product or service under
development (before work is complete, as opposed to afterwards) meets specified requirements.
Typically in the world of construction, the QA aspects of a project are intended to assure the owner that
the contractor’s or vendor’s QC practices are adequate to deliver the product or service that the owner has
contracted.
Some of the product standards do require the manufacturers to undertake qualification or “type” testing,
which is intended to demonstrate the long-term performance of the liner under the intended use
conditions. However, the amount of this testing is very limited. Post-installation CCTV is the most
common QC requirement for all liners followed by the retrieval of samples for physical property
verification. More details on these requirements can be found in the following sections on short-term and
long-term QA/QC requirements in factory and field settings.
5.6.1 Short-Term – Factory and Field Requirements
5.6.1.1 PVC Short-Term QA/QC Requirements
Folded PVC
The short-term QC requirements in the factory for folded PVC pipes include pipe flattening, pipe impact
strength, pipe stiffness, extrusion quality (acetone immersion, heat reversion), and flexural properties.
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