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

Pressure Drop in Vertical Section of Gas Piping

Pressure Drop in Vertical Section of Gas Piping

Pressure Drop in Vertical Section of Gas Piping


im trying to calculate the pr. drop in vertical piping for gas.

i have a vertical section where gas goes down in elevation 5 ft

the pressure at starting point is 85 psig

since there is fall of 5 ft i assume pr. gain can be calculate as = rho x g x h2-h1 where h2 is 5ft , h1 is 0 ft

for frictional drop can we just use the darcy eqn for vertical or there are some other considerations??

attachd sktch

RE: Pressure Drop in Vertical Section of Gas Piping

I have to ask why?

If the pressure at the start is 85 psi, then the pressure at the end will be about 84.995 psig.

But your calculation looks OK to me.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Pressure Drop in Vertical Section of Gas Piping

The pressure drop is minimal, you are right


RE: Pressure Drop in Vertical Section of Gas Piping

You can ignore elevation change for piping handling compressible fluids. Only the equivalent length matters for those pressure drop calculations.

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


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