1. AND AFTER INSTALLATION Technical Director, NASSCO
MINIMUM QUALITY ASSURANCE GOALS BY THE TRAINED INSPECTOR BEFORE, DURING
AND AFTER INSTALLATION by
Lynn E. Osborn, P.E.
Technical Director, NASSCO

2. Material Quality
Key installation materials confirmed before and during construction:
Resin
CIPP Tube
information, before installation
Polyester
Vinyl ester
Epoxy
* Associated Polymer Labs

3. Resin Quality
Verifiable industry standard material as required in contract
Verified by performing a spectroscopic analysis of the resin
Matching the fingerprint of the supplied resin with the fingerprint of the specified resin
Monitor wet out
information, before installation

4. Example of Resin Fingerprint

5. Resin Quantity In many cases the resin is the CIPP
Unless fiberglass or carbon fiber are added for enhanced physical properties, the felt tube material is only a mechanism for distributing the resin and holding it in place to control final thickness
The inspector is trained to verify resin quantity installed to meet the contract requirements specified. Typically 85% resin to 15% felt.
By reviewing the wet out report and the material supplier’s resin saturation charts

6. Example CIPP Wet-Out Report

7. Example Saturation Chart (Pounds per Foot)
Pipe Diameter, inches
3.0
4.5
6.0
7.5
9.0
10.5
12.0
13.5
15.0
16.5
18.0
19.5
1.0
1.5
8.0
1.3
2.0
2.6
3.2
3.8
10.0
0.0
2.5
3.3
4.0
4.8
3.9
4.9
5.8
3.7
6.1
7.3
5.9
7.4
8.8
10.2
21.0
6.9
8.6
10.3
13.7
24.0
7.9
9.9
11.8
15.7
17.6
27.0
11.1
13.3
15.5
17.7
19.8
22.0
30.0
12.4
14.8
17.2
19.7
22.1
24.5
33.0
16.3
19.0
21.7
24.3
29.6
36.0
17.8
20.7
23.7
26.6
29.5
32.4
35.3
42.0
24.2
27.7
31.1
34.5
37.9
41.2
44.6
22.5
25.5
28.5
48.0
31.6
35.6
39.5
43.4
47.2
51.1
55.0
58.8
62.7
54.0
40.1
44.5
48.8
53.2
57.6
62.0
66.3
70.7
75.0
60.0
49.5
54.3
59.2
64.1
69.0
73.8
78.7
83.5
88.3
66.0
59.8
65.2
70.6
75.9
81.3
86.6
92.0
97.3
102.6
72.0
71.2
77.1
82.9
88.8
94.6
100.5
106.3
112.1
Thickness (mm)

8. Tube Quality
Verifiable industry standard material as required in contract
Visually checked, typically before and/or during wet out
Stored in accordance with tube manufacturer’s recommendations
Checked for damage: Holes, rips, tears, weathered or abraded areas.
Repaired in accordance with manufacturer’s recommendations or discarded if not repairable
Labs
, before installation

9. Installation Quality
Trained inspector can determine if host pipe is acceptable for CIPP installation
Based on ASTM or specified standards
Or if additional preparation and/or cleaning is required.

10. Curing
Curing the wet out liner is a critical process in producing a quality CIPP.
The trained inspector understands what it takes to cure a liner based on the manufacturer’s suggested requirements and for different field conditions.
Curing can be monitored either from digital readers or from a computer, recording the curing time and temperatures.
Actual cure schedule can be compared to the recommended cure schedule

11. Sample Cure Log

12. CIPP Cure Monitoring Digital read outs from thermocouples
Computer output from continuous temperature monitoring

13. Service Reconnections
All service connections re-opened to contract requirements including size and quality of the cut.
Requires trained and experienced cutter operator
Equipment available today to effectively cut smooth connection
Connection should not have hangi g material or shark teeth remaining in the final cut

14. Quality Verification After Installation
Visual quality
Physical properties
Dimensional conformance
Resistance to corrosion
Leakage

15. Conclusion
All Quality Controls, Testing and Inspection Requirements must be Specifically Defined in the Contract Documents