×
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

Roughness value for rubber hose

Roughness value for rubber hose

Roughness value for rubber hose

(OP)
I see this question come up from time to time, but I don't think I've ever seen a definitive answer.  I didn't find a good answer using the keyword search function.  Anyone know what range of roughness values (or friction factors) to apply to rubber hose for the purpose of calculating flow rates?  Would clean commercial steel pipe be a good approximation?

RE: Roughness value for rubber hose

Is it really rubber hose or some type of plastic?

I have used an absolute roughness figure of 0.7 micron in the past for hose having a liner extruded in nylon.

RE: Roughness value for rubber hose

(OP)
Well, you know, I'm not entirely sure.  It's red and it's flexible, but it's also pretty smooth.  I guess it could be either...?

RE: Roughness value for rubber hose

Any markings? Manufacturer? Part number?

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