×
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

Allowable Stress for 32760 heat Exchanger material

Allowable Stress for 32760 heat Exchanger material

Allowable Stress for 32760 heat Exchanger material

(OP)
1) Noting that ASME Sec II D does not provide Allowable stress for Super Duplex grage 32760 (A 182 F55 Equivalent) for all product form, is ok to have a heat exchangers made from 3270 Plates, 32760 forgings etc since TEMA addresses these material.  

2) Can 32750 allowable stress be used for 32760 alloys.

3) Is there a code case, i understand there was a code case 1853 for super duplex, does this address 32760?

4) One of the supplier broucher indicates 190 N/Sq MM as the allowale stress at room temperature, can value be used as allowable stress for 32760 tubes?

 

RE: Allowable Stress for 32760 heat Exchanger material

bmoorthy

Quote:

1) Noting that ASME Sec II D does not provide Allowable stress for Super Duplex grage 32760 (A 182 F55 Equivalent) for all product form, is ok to have a heat exchangers made from 3270 Plates, 32760 forgings etc since TEMA addresses these material.

Reply; No, if the heat exchanger is built to ASME Section VIII, Div 1, and requires a U stamp. Otherwise, you can fabricate to TEMA and other standards.

Quote:

2) Can 32750 allowable stress be used for 32760 alloys.

Reply; No, allowable stresses should be determined for each grade of material, regardless.

Quote:

3) Is there a code case, i understand there was a code case 1853 for super duplex, does this address 32760?

Reply; Can you provide a date of this code case? I did a quick search and could not find it as active.

Quote:

4) One of the supplier broucher indicates 190 N/Sq MM as the allowale stress at room temperature, can value be used as allowable stress for 32760 tubes?

Reply; Unless you know how the allowable stress was determined, I would not use it.









 

RE: Allowable Stress for 32760 heat Exchanger material

(OP)
A) The exchanger is not U stamp

B) If i have to design to TEMA and generall in accordance with ASME and use ASME values, then how to get the allowable stress for material like 32760, especially for Flanges and for tubes

C) I came across Code Case 1883 (Sorry not 1853) in Ferralium's Broaucher where code case 1883 is refered against 32750/32760. In the same broacher, isee they declare the alowable stress is 190 N/Sq MM


http://www.nationalmetaldistributors.com/download/Ferralium%20Leaflet.pdf

RE: Allowable Stress for 32760 heat Exchanger material

I did not see a code case active for 1883. This means that it either did not get ratified or there is a typo somewhere. I checked on my C&S connect for ASME B&PV code committee members and I saw nothing for 1883.


Also, I checked the same brochure and if you read the fine print, this code case was not ratified at the time the brochure was printed.

So, you are at your OWN risk if you decide to use the allowable stress values stated in the brochure.

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