×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!
  • Students Click Here

*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

Jobs

Dynamic Load Factor for Water Hammer

Dynamic Load Factor for Water Hammer

Dynamic Load Factor for Water Hammer

(OP)
Does anyone know what a maximum Dynamic Load Factor (DLF) would be for a piping system affected by water hammer?

I've seen and/or heard from multiple engineering firms that they use a DLF of 1.5. From everything I've read, water hammer typically has a trapezoidal ramp function which could mean a maximum DLF of 2.0 (for single impacts).

Does anyone know where this 1.5 comes from? I'd love to have some literature to back up the use of a less conservative DLF.

I find it odd that more than 1 firm has made the same claim, so there may be some validity to it.

RE: Dynamic Load Factor for Water Hammer

In regard to what?
Loads applied to the piping system?
For estimating dynamic pressures in the piping system?
For estimating loads applied to supports?

RE: Dynamic Load Factor for Water Hammer

(OP)
For estimating loads applied to the piping system by the water hammer. This would be used in the pipe stress analysis.

RE: Dynamic Load Factor for Water Hammer

So than what would you multiply by the load factor of 1.5?

RE: Dynamic Load Factor for Water Hammer

Dynamic load factor maximum is 2.0. For a pseudo static analysis use 2.0. You could always perform a hydraulic analysis then you could take the loads from it and do a dynamic load analysis of the piping without the DLF.

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!


Resources