MONITORING HYDROGEN DAMAGE IN PIPELINES AND PRESSURE VESSELS

摘要

This paper summarizes the development and use of a non-intrusive, field/plant patch-type probernfor use in monitoring hydrogen flux in wet H_2S piping, vessels and pipelines. It utilizes a Devanathan cellrnwith a Ni layer on the external surface of the equipment. The use of the Ni-layer was found to be lessrnexpensive and easier to implement on-site than conventional Pd systems. Laboratory tests werernconducted with the flux monitoring system in several wet H_2S environments, including the standardrnNACE TM 0177 and TM 0284, to determine its response and to correlate its current output with thernsusceptibility of conventional A516-70 steels to hydrogen induced cracking. This paper also describes the