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ASME B31.12   2023   Hydrogen Piping and Pipelines 30 $
ASME B31.12   2019   Hydrogen Piping and Pipelines 30 $
ASME B31.12   2014   Hydrogen Piping and Pipelines 30 $
ASME B31.12   2011   Hydrogen Piping and Pipelines 30 $
ASME B31.12   2008   Hydrogen Piping and Pipelines 20 $