×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

NACE H2S Upper Limit
2

NACE H2S Upper Limit

NACE H2S Upper Limit

(OP)
I have searched this topic and I can't find the information.

Question:
Is there an upper concentration limit for the NACE MR0175?

Example:
I can see that for carbon steels Rc22 is the max hardness to operate in the SCC zone as depicted by MR0175. But the charts in MR0175 show a limited pressure range and concentration range.

So - would I still be good with this standard if I know that I would be operating at 50% H2S at 10,000 psi?  It would definately be in the SCC zone, but would the concentration and the pressure affect the Rc22 rule?

Please advise.

jackboot

RE: NACE H2S Upper Limit

2
I have been involved in much SSC testing of steels for oil/gas production.  The upper limit hardness is a function of pH and H2S concentration.  There isn't much published on this.  Since steel with 22 HRC hardness can withstand 100% H2S (e.g. testing according to NACE TM0177), you should be okay with the 50% concentration.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: NACE H2S Upper Limit

(OP)
Thanks for the information.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources