research / development / technology conclusions circumferential cracking and specifically circumferential scc has caused a number of pipeline failures. it is not a com- mon hazard and may be neglected in integrity management planning. good industry guidance, for example from cepa, is available that gives advice on the management of cscc. however the guidance on how to collect and integrate the information required is limited. in particular ways to identify areas with damaged coatings, and how to get good estimates of axial stress levels. the process described here integrating inertial monitoring ili data to calculate bending strain, with modelling to estimate total axial stress, corrosion diagnosis to understand coating condition, and gis based data alignment to correlate other risk factors fills some key gaps and aids in identifying pipe- lines where there may be a real threat of cscc and where there is a genuine benefit in running tools designed to detect circumferential cracking before the combination of cracking and loading reaches a critical level and there is a failure. figure 10: c scan of two cracks close to a girth weld. crack depths are 2.5 mm (upper crack signal, length 15 mm) and 4 mm (lower crack signal, length 14 mm). references alexandre m. pope et al., circumferential scc in pipeline due to land creeping, ipc02-27192, 4th international pipeline conference, september 2002, calgary, alberta, canada. vinod chauhan et al. failure investigation of a natural gas transmission pipeline, ipc2012- 90223, 9th international pipeline conference, september 2012, calgary, alberta, canada. francis carroll, et al., pipeline emergency repairs, combining ili data analysis with field as- sessment, australian pipeline and gas association annual conference, october 2015, gold coast, queensland australia. p hopkins, some experiences of applying the pressure systems regulations to older systems, imeche paper c454/006/93, institute of mechanical engineers, london, 1993. r amend, early generation pipeline girth welding practices and their implications for integrity management of north american pipelines. ipc2010-31297, 8th international pipeline conference ipc2010 september 27-october 1, 2010, calgary, alberta, canada. colin dooley, et. al. approaches for evaluating the vulnerability of pipelines at water crossings, ipc2014-33240, 10th international pipeline conference, september 2014, calgary, alberta, canada. neb, stress corrosion cracking on canadian oil and gas pipelines, national energy board report. december 1996. m h - 2 - 9 5. canada j ward, metallurgical examination of dn250 x46 api 5l pipe failed due to land slippage, .report no. 4211-1388. als., australia. january 2012. b n leis, r j eiber, stress-corrosion cracking on gas-transmission pipelines: history, causes, and mitigation, first international business conference on onshore pipelines. berlin. december 2007 robert l. sutherby, the cepa report on circumferential stress corrosion cracking, international pipeline conference 1998. cepa recommended practices for managing near neutral ph stress corrosion cracking, 3rd edition, may 2015. fessler, r.r. and a.d. batte. 2013. criteria for susceptibility to circumferential scc. pipeline research council international report, catalog no. pr-313-113603-r01. raymond r. fessler; millan sen, characteristics, causes, and management of circumferential stress-corrosion cracking, ipc2014-33059, 10th international pipeline conference, september 2014, calgary, alberta, canada. stephen westwood, et al., in line inspection of geotechnical hazards, ipc2014-33245, 10th international pipeline conference, september 2014, calgary, alberta, canada. hendrik aue et al., high-quality geometry module data for pipeline strain analy- ses, pigging products and services association annual seminar aberdeen uk, 2007. aaron lockey and andy young, predicting pipeline performance in geohazard areas using ili mapping techniques, ipc2012-90496, 9th international pipeline conference, september 2012, calgary, alberta, canada. andy young and aaron lockey, the assessment of pipeline integrity in geohazard areas using ili data, ipg2013-1971, asme 2013 international pipeline geotechnical conference july 2013, bogota, colombia. marc baumeister, et. al., ultrasonic crack-detection in demanding pipeline envi- ronments and low diameter pipes, ipc2010-31279, 8th international pipeline conference, september 2010, calgary, alberta, canada. g knauf, p hopkins, the eprg guidelines on the assessment of defects in transmission pipeline girth welds, 3r international, 35, jahrgang, heft 10-11/1996. autors rolandpalmer-jones macawengineeringltd.uk general manager rpalmerjones@rosen-group.com thomasbeuker rosentechnology&research centergmbh head of group business line advanced pipeline diagnostics tbeuker@rosen-group.com pipeline technology journal 41 report. december 1996. m h - 2 - 95. canada