Feb 3, 2019 #1 viki100 Mechanical Mar 3, 2014 21 0 0 PL Dear Friends, Is the hydrogen content H2 of 2.5 [mol %] in the helium-nitrogen stream dangerous to stainless steel 304 / 304L, seamless piping 1/2 - 1 1/2 '' SCH40S, pressure working ca. 20 barg, temperature range +20 / -165 degC? Regards, VIKI
Dear Friends, Is the hydrogen content H2 of 2.5 [mol %] in the helium-nitrogen stream dangerous to stainless steel 304 / 304L, seamless piping 1/2 - 1 1/2 '' SCH40S, pressure working ca. 20 barg, temperature range +20 / -165 degC? Regards, VIKI
Feb 3, 2019 #2 XL83NL Mechanical Mar 3, 2011 3,043 0 36 NL No. SS normally isn’t affected by H2. See e.g. ASME B31.12. Upvote 0 Downvote