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


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.

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
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.


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.


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

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


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

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


White Paper - The Criticality of the E/E Architecture
Modern vehicles are highly sophisticated systems incorporating electrical, electronic, software and mechanical components. Mechanical systems are giving way to advanced software and electronic devices, driving automakers to innovate and differentiate their vehicles via the electric and electronic (E/E) architecture. As the pace of change accelerates, automotive companies need to evolve their development processes to deliver and maximize the value of these architectures. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
Modern cars, trucks, and other vehicles feature an ever-increasing number of sophisticated electrical and electronic features, placing a larger burden on the wiring harness that enables these new features. As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - Modeling and Optimizing Wire Harness Costs for Variation Complexity
This paper will focus on the quantification of the complexity related costs in harness variations in order to model them, allowing automated algorithms to optimize for these costs. A number of real world examples will be provided as well. Since no two businesses are alike, it is the aim of this paper to provide the foundational knowledge and methodology so the reader can assess their own business to model how variation complexity costs affect their business. 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