×
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

Monoflange qualification

Monoflange qualification

Monoflange qualification

(OP)
In the process applications is a high response speed required for the most control applications. One of the variables that affect the response time is the volume and the distance between process and pressure sensor. This why a monoflange is an interesting solution to connect the pressure sensor to the process.



If we look at the qualification of the monoflange then we will find out that is impossible to design the monoflange according to asme b16.34, because asme b16.34 covers valves with:

Flanged end (monoflange has not a flanged end)
Threaded end (monoflange has not a threaded end)
Welded end (monoflange has not a welded end)



It’s only possible to determine the external and internal wall thicknesses of the monoflange according to asme b16.34, but this does not mean that the monoflange valve is designed according to asme b16.34

It’s also interesting to know that all monoflanges has been designed to be connected to an asme b16.5 flanges.

My question:

Why would someone use a monoflange valve that is not qualified in process applications?
Are there any standards to design a monoflange?



Thanks in advance for your time.

RE: Monoflange qualification

You can qualify it by during burst tests, well you can for B31.3. It wont be qualified to B16.34, but can be used in the relevant piping standard (I'm familar with B31.3). B31.3 talks about "unlisted components" section 304.7.2. I would be surprised if the supplier didn't already have some documentation about this.

Andrew O'Neill
Specialist Mechanical Engineer
Australia

RE: Monoflange qualification

(OP)
Thank you very much for your relevant information’s

I learned last days that is also possible to design a monoflange according to ASMEB16.34, by using paragraph 6.7 in ASME B16.34 for wafer or flangeless valves. The monoflange valve appears to be this type of valve and if it complies with the requirements of paragraph 6.7, then it is within the scope of B16.34.

Ali Al-Saadi
Mechanical Engineer
The Netherlands

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