March 2, 1995
GM&A has completed a test program on Protecto 401 Ceramic Epoxy lined pipe coupons. The results of the completed tests are reported herein. They include the following test procedures:
ASTM G-14: Standard Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test).
Coating System: PROTECTO 401 CERAMIC EPOXY (Internal) Lining, Plant applied to the internal surface of ductile iron with a reported age in excess of eighteen months.
The conditions of the test include the following: 48 hour minimum temperature and humidity equilibration within the lab at 73 °F (23 °C). Coupons were approximately 3 x 6 inch with coating applied at a DFT of 33 to 48 mils (825 to 1175 microns). The weight of the falling impactor was 4 pounds. Continuity was determined with a low voltage, wet sponge holiday detector per ASTM G-62. Four panels were evaluated for the test using a Gardner Model #5510 Impact Tester.
|
PANEL NO: |
1 |
2 |
3 |
4 |
|
TOTAL NUMBER OF IMPACTS: |
6 |
6 |
8 |
8 |
|
FILM THICKNESS (MILS): |
37-39 |
39-44 |
33-36 |
45-48 |
The impact results using a four (4) pound weight were as follows:
|
HEIGHT OF DROP, INCHES: |
16 |
17 |
18 |
19 |
20 |
|
Number of Impacts: |
5 |
5 |
14 |
2 |
2 |
|
Number of Pass: |
5 |
5 |
9 |
0 |
0 |
|
Number of Fail: |
0 |
0 |
5 |
2 |
2 |
RESULTS: The average impact strength of the coating as tested was determined to be 72 inch pounds.
CERTIFIED:
Dr. George Mills
Date: 2 March 1995
