×
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

High temperature (650 Deg F) stud material for 8 inch, Class 300 steam flange

High temperature (650 Deg F) stud material for 8 inch, Class 300 steam flange

High temperature (650 Deg F) stud material for 8 inch, Class 300 steam flange

(OP)
Reference Thread: thread292-404005: STUD Bolt ASME standard (Now closed)

We are replacing the B31.1 saturated steam piping from a competitor's existing turbine casting.

7x flanged pipe connections from the turbine are built up from the turbine with "standard" ASME pipe flanges welded to pipe stubs welded to the casing. Our new pipe flanges match those 7x turbine flange dimensions and bolt circle diameters, thickness, etc perfectly. No problems.

Design conditions at the last flange are 650 deg F at 320 psig.
This turbine flange is cast integrally with the turbine upper casing. Its machined surfaces and tapped holes match the dimensions for the expected mating 8 inch Class 300 pipe flange although the flange OD and cast thickness differ. The 12x Studs will be 7/8 diameter x 5-1/4 long.

However, I cannot find a clear requirement for the stud material: Steam Temperature is 650 F, but I do not want stud stretch over time by assuming the wrong material.

RE: High temperature (650 Deg F) stud material for 8 inch, Class 300 steam flange

Be hard to go wrong w/ B7 I'd think...

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: High temperature (650 Deg F) stud material for 8 inch, Class 300 steam flange

If you wanted to be on the safe side you could go to B16.

RE: High temperature (650 Deg F) stud material for 8 inch, Class 300 steam flange

For 650 deg F, I agree that A193 B7 is appropriate. As BJI states, A193 B16 can be used, but will really be overkill.

B7 should be good for up to about 750 deg F service temperature applications. B16 is good for up to around 1,000 deg F.

RE: High temperature (650 Deg F) stud material for 8 inch, Class 300 steam flange

(OP)
My thanks to all. We've ordered B7 material.

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

White Paper – Choosing the Right Spring Loaded Connector
In today’s cost-sensitive world, designers are often driven to specify the lowest cost solution for every aspect of their designs to ensure that their solution is competitively priced and their company remains profitable. However, specifying a low-cost, low-quality connector solution can result in premature failure, considerable re-work costs and damage to reputations. Download Now
eBook – Own the Lifecycle: Sustainable Business Transformation
Increasingly, product and services companies are seeking more information and control in the operational lifecycle of their products, including service and use. Better information about the operational lifecycle, and the ability to use that information, requires more than just unstructured data flowing back from products in the field. 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