Operating pipelines are subjected to cyclic loadings, primarily as a result of pressure
fluctuations. The cyclic loadings are a contributing factor in crack growth by near-neutral pH
stress corrosion cracking (SCC). As part of pipeline integrity management programs, it is
necessary to perform threat assessments of pipelines and prioritize segments of the pipelines
for risk from the various threats. This paper describes methodologies for ranking pipeline
segments for risk from near-neutral pH SCC based on the cyclic loading history. The
approaches are based on over ten years of research funded by the Pipeline Research Council
International, (PRCI) and the Gas Research Institute (GRI) and relates the strain rate or
displacement rate at pre-existing cracks in the pipeline, calculated from the pressure history,
with crack growth rate.