The annual report is especially important because it will be used, based on a requirement in the 2012 pipeline safety bill, by PHMSA and Congress to determine: 1) whether to expand the integrity management program beyond high consequence areas (HCAs), 2) whether to test previously untested gas transmission pipelines located in HCAs and operating at pressure greater than 30% of specified minimum yield strength, 3) whether to require inline inspection.
What does SMYS stand for?
SMYS stands for Specified Minimum Yield Strength (steel pipe)
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Samples in periodicals archive:
Department of Transportation Pipeline and Hazardous Materials Safety Administration (PHMSA) finalized new rules allowing transmission companies to operate pipeline segments in Class 1 locations at 80 percent of specified minimum yield strength (SMYS) of the steel.
Alliance Pipeline is the first US system to operate at 80% of the specified minimum yield strength (SMYS) under a special permit.
However, George Mosinskis, managing director of operations safety for the American Gas Association (AGA), says any integrity rule should apply only to pipelines operating at or above a hoop stress level of 20 percent of specified minimum yield strength (SMYS).
While PHMSA ditched the controversial human resources component in the IM plan, as distribution companies requested, it did not grant another request: that it reclassify low-stress pipelines now classified as gas transmission lines--and thus under the much more onerous interstate IM program--as distribution lines if they operate below 30% specified minimum yield strength (SMYS).
If a company finds a dent in a steel gas transmission line or main which operates at 20 percent of more of specified minimum yield strength (SMYS), the operator has to remove the dent by cutting out the damaged piece of pipe as a cylinder.
Six months after giving pipelines the green light to use high-stress pipelines more widely, the Pipeline and Hazardous Materials Safety Administration (PHMSA) is now highlighting safety concerns with new pipelines operating at 80% of specified minimum yield strength (SMYS).