February 2019, Vol. 246, No. 2

Features

Combined Flaws Represent Key Danger to Pipelines

P&GJ Staff Report  Zubin Sergey Zubin, chief engineer of Transneft Diascan, discusses the importance of detecting “combined flaws,” or those that occur in close proximity on the pipeline, with Pipeline & Gas Journal.  His company provides research and development services, as well transporting crude oil and oil products.  P&GJ: What are combined flaws?  Zubin: Combined flaws are combinations of separate discrepancies that do not meet the standard requirements of the wall, geometric shapes of the pipe and welded seams on a limited part of the pipeline. According to the regulatory documentation of PJSC Transneft, combined defects are t

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