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