Hydrogen H2 under Type B steel repair sleeve - pipeline - Cathodic Protection CP
Hydrogen H2 under Type B steel repair sleeve - pipeline - Cathodic Protection CP
(OP)
Has anyone experienced the development of hydrogen between the carrier pipe and the fully welded Type B steel repair sleeve? With enough hydrogen produced to dent the carrier pipe due to a thicker steel sleeve? Can an overdriven CP system produce hydrogen from the carrier pipe under a steel sleeve? Or because the steel pipe and steel sleeve are electrically connected, the CP acts on both equally.
Maybe same scenario as a blister within a pipeline wall. Or maybe not. Thanks, AWOL
Maybe same scenario as a blister within a pipeline wall. Or maybe not. Thanks, AWOL





RE: Hydrogen H2 under Type B steel repair sleeve - pipeline - Cathodic Protection CP
I am just guessing here, but I would say there was a dent in the pipeline and someone has put a B-Sleeve overtop as a repiar, the dent hasn't formed after the sleeve was put on. Or there was already hydrogen blistering there and someone put a B-Sleeve over as a repair.