×
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

17-4 PH and NACE MR 0175

17-4 PH and NACE MR 0175

17-4 PH and NACE MR 0175

(OP)
I'm selecting a material for a pump (impeller and shaft) in Sour Service as per NACE MR 0175.
My first choice is 17-4 PH above all becouse in the first period the service is not sour and for the future 200 ppm is indicated (very low).
My doubt is, with reference of section A.8 (Precipitation hardened stainless steels), which is the table to be taken in consideration for a pump? This also for other more corrosive cases.

Thanks in advance

RE: 17-4 PH and NACE MR 0175

MaxCarb

If you need to select a material for sour service you need to calculate the partial pressure of H2S and you need also to take into account other factors like the temperature, chloride conc and presence of elemental sulphur. You shall also tale into account all the possible corrosion mechanism like pitting and other localized form of corrosion.
Table A26 is for any equipment or component but 17-4PH is not listed. The 17-4PH is listed in table A27 but only for wellhead and christmas tree components (excluding bodies and bonnets), valves and
chokes (excluding bodies and bonnets) packers and other subsurface equipment.

Hope this help

S.

Corrosion Control

RE: 17-4 PH and NACE MR 0175

(OP)
Thanks for your reply.
My doubt regards only which table i must take in consideration concerning the impeller and shaft material of the pump.
Maybe i could take in consideration table A.28 under miscellaneous equipment or A.27.

Regards

M.

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