NYSEARCH/Kiefner Present Completed Study on Critical Cracks at International Pipeline Conference

Earlier this year, NYSEARCH completed a study conducted by Kiefner and Associates to identify critical crack sizes for longitudinal and circumferential cracks found using In-Line Inspection technologies such as Explorer™. This study differs from prior studies as it examined and considered the integrity of varying material strength properties (ie. toughness, yield strength, tensile strength) together with ILI inspection tool accuracy (measurement variability) in determining what the limiting crack sizes would be to meet safety standards (for various steel pipe grades) that are set by the integrity standard of hydrostatic pressure tests. In October, Michael Rosenfeld of Kiefner and Associates as co-author with David Merte of NYSEARCH/NGA, presented the study results at the International Pipeline Conference in Calgary.

NYSEARCH members and others are examining the critical crack study information and incorporating the threshold levels by material strength and other important paramaters as well as safety factors into the design of crack detection technologies. Applicable technologies include the crack sensors that NYSEARCH is developing with Invodane Engineering and Radiation Monitoring Devices (RMD). The group is examining its current crack detection specifications as well as test results as it continues live testing and moves towards commercialization of the Invodane crack sensor for the Explorer Series of platforms which is expected in 2015.

For over thirty years, NYSEARCH has worked as a consortium of natural gas Local Distribution Companies (LDCs) who have a common interest and need for research and technology development and demonstration. Today, as part of the Northeast Gas Association (NGA), NYSEARCH manages over (30) projects in various stages of development for LDCs, transmission companies, federal agencies and their manufacturing and commercial partners. NYSEARCH is located in Parsippany, NJ and NGA is headquartered in Needham, Massachusetts.