×
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

API 623 Valve with Corrosion allowance

API 623 Valve with Corrosion allowance

API 623 Valve with Corrosion allowance

(OP)
Hi everyone

im working in a valve supplier as an application engineer and i need some suggestions from valve experts here.

my customer asking for API 623 Globe valve with corrosion allowance 6 mm. and it will be used for hydrocarbon services.
my question is does wall thickness calculation for my valve shall follow ASME B.1634 wall thickness + CA 6mm or API 623 wall thicknesa + CA 6mm?

thanks a lot for the attention

RE: API 623 Valve with Corrosion allowance

Hi,

I think below thread answers to your question. Well you need to read between the lines. Courtesy of respected Valve Subject Matter Experts.
https://www.eng-tips.com/viewthread.cfm?qid=213719

Read JimCasey's reply for your particular question. And others for extra insight.

Regards,
MR

https://nosuchvalve.com
All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected

http://www.eng-tips.com/faqs.cfm?&rat1=2&f...

RE: API 623 Valve with Corrosion allowance

The minimum wall thickness specified in the API 623 valve standard mirrors API 600 specifications and is greater than ASME B16.34.

RE: API 623 Valve with Corrosion allowance

Hi, It should Be as per Design Standard + CA

RE: API 623 Valve with Corrosion allowance

When specifying valve, any mention of corrosion allowance is ludicrous and is lazy piping spec copy paste. API 623 wall thickness is written to copy API 600 wall thickness, which already have built in "thicker" wall thickness added in when compared to ASME B16.34. This was mainly done because we know casting innately have defect in them and the standard was written for a more robust valve. Can you imagine a valve still working after the wall already corroded 6mm down? the seat ring would just fall right off.

However, for CODE purposes, as most likely the piping system is being built to ASME codes, you can go off ASME B16.34 thickness + CA, or if that does not cut it, straight ASME VIII wall thickness + CA. This is just to satisfy CODE, which have nothing to do with actual valve buying.

You will just buy API 623 valve with the "api 600" wall thickness thats been used for decades.

PS: most API 600/623 wall thickness meets the standard 3.2mm CA many people love copy pasting when compare to ASME B16.34

Luke | Valve Hax | https://valvehax.com/

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