×
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

Stack lining

Stack lining

Stack lining

(OP)
Hello friends
I have a question about the inside lining material of our gas turbine stack. The GT supplier has instructed us to use stainless steel grade 409. But unfortunately I've not found this grade in our market. Grade 321, which is a suitable replace, is an expensive one. I want to use grade 430, which has half price of 321 in our market. Is it technically a suitable substitution? Please note that the flue gas temperature is 600ºC, the lining consists of 1m by 1m segments sliding over each other and no welding is applied on stainless steel plates.
Thanks for your kink helps.
Hossein
 

RE: Stack lining

If you can't obtain 409 use 439 stainless steel, which is a stabilized grade of ferritic stainless steel, for the GT duct.

RE: Stack lining

(OP)
Thank you Metenger for your comment.But what is your opinion about 430, which is available in our market?  

RE: Stack lining

At your stated exhaust gas temperature, I don't believe you will get the service life you need from 430, because it will suffer from high temperature oxidation. Go with the stablized grade.

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