In a previous paper, guidelines for assessment of bolt and nut corrosion on pressure boundary bolted joints was developed and verified using tests on joints with spiral wound gaskets. The work has since been extended to include a wider range of gasket types, corrosion of the flange itself (in addition to the bolts and nuts) and higher pressure class joints. This paper provides a summary of the additional work performed and updated guidance on general guidance for acceptable levels of corrosion for each component in the pressure boundary bolted joint.

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