Smart questions
Smart answers
Smart people
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • 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!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Donate Today!

Do you enjoy these
technical forums?
Donate Today! Click Here

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

ASME AG-1 Fluid Momentum Loads in HVAC duct

henerythe8th (Structural) (OP)
22 Jul 03 19:56
I am currently working on an HVAC duct analysis for a nuclear waste treatment facility.  The duct is to be analyzed per ASME AG-1 which includes in some load combinations a "Fluid Momentum Load" or "FML".  ASME AG-1 Section AA-4211 define this as:
loads other than those listed here, such as the momentum and pressure forces due to fluid flow

and Section SA-4211 (c) this is as defined in AA-4211 with the following clarification:
Ductwork shall be designed to withstand FM loads resulting from air turbulence, often found in sections following fan discharges, with or without fan accessories, and certain dampers and duct fittings.  The termination of such sections is marked by the length of straight ductwork required to regain uniform ariflow as given by AMCA 201 Fig. 20:
and goes on to provide formualae for determining the straight length of duct.

So...

...how are these loads calculated?
pavlik (Mechanical)
8 Jan 04 13:34
I think it's nothing more than Volume times Density times Velocity.

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!

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