×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

TESTING OF DUAL CERTIFICATION F316/F316L.

TESTING OF DUAL CERTIFICATION F316/F316L.

TESTING OF DUAL CERTIFICATION F316/F316L.

(OP)
Hi,

We have an valve requirement of Dual material grade with CF8M/CF3M, when we do pressure testing for this valve, as per API 598 shell test shall be 1.5 times of maximum allowable pressure at 38 °C (100 °F)and seat test shall be 1.1 times of maximum allowable pressure at 38 °C (100 °F).

When we refer to ASME B16.34, for CF8M material testing pressure is high compare to CF3M,what is the test pressure can be use to test these valves.

RE: TESTING OF DUAL CERTIFICATION F316/F316L.

Since dual cert it must be based on the stronger of the two, since that is what you are claiming.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: TESTING OF DUAL CERTIFICATION F316/F316L.

(OP)
Thank you for the response, But i can't able to find it in any standard that for dual grade we have to go for higher test pressure,

Please advise the standard reference if any.


RE: TESTING OF DUAL CERTIFICATION F316/F316L.

There are two cases, and it rests on design and intent.
1. The design is based on dual cert and material is deliberately ordered as dual cert. In this case you presume that the higher strength was used in design and therefore must be used in testing. This should be your default assumption unless someone can show you documentation otherwise.
2. The design is based on L grade and the orders call out L grade, you just take dual cert out of convenience. In this case the design is based on the lower strength and the material should only be described (certified) as L grade, and the test pressure should be based on this lower value.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: TESTING OF DUAL CERTIFICATION F316/F316L.

(OP)
Thank you for the response.

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

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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