Long term pre-qualification testing program on a 230 kV XLPE cable system

1995 ◽  
Vol 10 (1) ◽  
pp. 10-17 ◽  
Author(s):  
T.C. Champion ◽  
F.M. Agostinelli ◽  
R.D. Rosevear
Keyword(s):  
Cable System ◽  
Testing Program ◽  
Xlpe Cable ◽  
Qualification Testing

Development of 275 kV XLPE Cable System and Prospect of 500 kV XLPE Cable

1983 ◽  
Vol PER-3 (9) ◽  
pp. 58-58
Author(s):  
M. Takaoka ◽  
M. Ono ◽  
I. Kaji
Keyword(s):  
Cable System ◽  
Xlpe Cable

Long-Term Evaluation of the Bonding Strength of Composite Repairs

2012 ◽  
Author(s):  
Khalid Farrag ◽  
Kevin Stutenberg
Keyword(s):  
Shear Strength ◽  
Elevated Temperatures ◽  
Water Solution ◽  
Effect Of Temperature ◽  
Shear Tests ◽  
Composite Repair ◽  
Testing Program ◽  
Repair Systems ◽  
Composite Repairs

The long-term performance of composite repair systems depends on their structural integrity and interaction with the carrier pipe. The adhesives used in the composites are critical components that not only bond the repair to the pipe, but also bond the individual layers of the repair to one another. The durability of the inter-laminate adhesive bond is required to ensure adequate load transfer between the pipe and the composite layers over the predicted lifetime of the repair. A testing program was performed to evaluate the shear strength of the adhesives used in composite repairs. The testing program evaluated the performance of seven commercially-available composite repair systems and it consisted of short-term and long-term shear tests on the adhesives and cathodic disbondment tests on the repair systems. The long-term shear tests were performed for 10,000 hours on samples submerged in a water solution with pH value of 9 and at various loading levels at temperatures of 70°F, 105°F and 140°F. The results of the long-term tests at elevated temperatures were extrapolated to predict the shear strengths at longer durations. The 20-year shear strengths of the composites were estimated using: (a) direct extrapolation of the best-fit curves and (b) the application of the rate process procedure. The results demonstrated the significant effect of temperature on the bond strength of the composites and provided a comparative analysis to evaluate the long-term shear strength and cathodic disbondment of the composite repair systems.

scholarly journals Use of standard samples for qualification inspections of testing laboratory for analysis safety of meat and meat products

2021 ◽  
pp. 45-53
Author(s):  
L. K. Baybolova ◽  
A. K. Khaimuldinova ◽  
Zh. B. Asirzhanova
Keyword(s):  
Proficiency Testing ◽  
Meat Products ◽  
Test Preparation ◽  
Test Results ◽  
Standard Samples ◽  
Comparative Testing ◽  
Testing Laboratory ◽  
Testing Program ◽  
Testing Laboratories ◽  
Qualification Testing

This article provides insights into qualification testing, interlaboratory comparative testing, and qualification testing programs in testing laboratories that analyze the safety of meat and meat products. Samples with codes OK-MB- 21 were used as a model for interlaboratory comparisons. The uniformity and stability of the CC code was assessed in accordance with GOST R 50779.60-2017 “Statistical methods. Application in proficiency testing through interlaboratory testing ”. Seven laboratories participated in the proficiency testing program. The test preparation procedure was described and the test results determined whether each sample tested was satisfactory or questionable. Participants with unsatisfactory results are encouraged to identify the causes of the alarms, take corrective actions and document them, and identify and eliminate the causes of the unsatisfactory results.

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