×
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

Material listed in B31.3 Vs ASME SecII D.

Material listed in B31.3 Vs ASME SecII D.

Material listed in B31.3 Vs ASME SecII D.

(OP)
Applying for CRN category "C". They are not flange valves. I need help, material of the body is St St 305 ASTM A-240. it is listed material but Code listed allowable stress for 100F temp only and product is designed for 150F. I checked ASME SecII D, material is listed there SA-240, 305 AND Su is listed in U table and yield is in Y-1 table.
Values are different B31.3
Tensile = 70ksi
yield = 25ksi
Allowable Stress = 16.7 ksi @ 100F
While
Values in ASME Sec II D
Tensile = 75@ 100F and 71.1 at 150F (Table U)
Yield = 30@ 100f and 26.7 @ 200F

Is there provision in B31.3 that data from AMSE SEC II D can be extrapolated for elevated temp and used in the calculation.


Regards,

RE: Material listed in B31.3 Vs ASME SecII D.

If I understand correctly you are attempting to get CRN approval for valves be placed in a B31.3 system. You should be producing your valve to a standard that is listed in B31.3. The valve standard you are using should give guidance as to where you get elevated temperature material properties from. If you produce vales to a standard that is not listed in B31.3 you need to look at the relevant sections for incorporating unlisted components.

Regards,

RE: Material listed in B31.3 Vs ASME SecII D.

(OP)
Dear SPDL310,
Thank you for reply, I really appreciate.
My understanding is that design can be registered if requirements are not converted by provisions of a recognized North American standards but manufactured to comply with either AEME 16.34, ASME31.3 or ASME Sec VIII D1 as supported calculations or witness proof test, marking, materials etc.
I read ASME B31.3, material A-240, 305 is listed material but allowable stress is only up to 100F.
then my second approach is to register with ASME Sec VIII D1, (material data is available in Sec II D)
if we have to register complying with ASME Sec VIII D1. can you please HELP with calculations, mainly wall thickness, it is UG-27?

and how to calculate allowable stress at elevated temp. etc.
to be honest I am not very much familiar with codes
Design temp is 150, pressure is 325

Regards,

RE: Material listed in B31.3 Vs ASME SecII D.

Surinderpal
I believe you can not use a piping code, B31.3, to design a valve. You should start with B16.34, See section 5.1.
There are limits to material use for pipe systems in B31.3. As you point out, the use of the 305 is limited in B31.3 to 100F

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! Already a Member? Login


Resources

eBook - Manufacturing the Cars of Tomorrow
In this ebook, we'll explore how additive manufacturing is going to transform the way cars are made. This includes commentary from thought leaders such as Ford's CTO, Ken Washington, Customer case studies of ways 3D printing is being used today, and a variety of part examples where 3D printing is already impacting how automobiles are made. Download Now
White Paper - Smart Manufacturing for Semiconductor
New technologies and approaches present great opportunities for semiconductor manufacturers to achieve high levels of innovation, yield and improvement. This white paper explores some of these cutting-edge technologies and how they can be applied effectively in the semiconductor industry. Read about how Smart Manufacturing is transforming the semiconductor industry. Download Now
White Paper - Analysis and Simulation in Aircraft Structure Certification
Organizations using simulation and analysis tools effectively see the benefits in their ability to achieve certification faster and with drastically less total cost than those who do not maximize these tools. Read this White Paper to learn about how digital tools such as analysis and simulation help in aircraft structure certification. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close