×
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

SDR 26 Pipe, Burst and Collapse

SDR 26 Pipe, Burst and Collapse

SDR 26 Pipe, Burst and Collapse

(OP)
I am trying to find the burst and collapse pressures for 8" SDR26 pipe. The pipe is 160psi rated acording to spec sheets I have seen online but I am not sure if that is burst (presumeably) or collapse. I also don't know how this value was arrived at as I have found a spec sheet which quotes the Yield Strength at 7450. Could someone straighten this out for me please??

Thanks

RE: SDR 26 Pipe, Burst and Collapse

For the former I believe the claim is the pipe is good for field application of that amount of internal pressure (should not fail).
Not sure exactly what kind of spec sheet you are looking at for the latter, but the "7450" could be about the wall hoop or tensile stress level that could indeed cause a tensile burst or failure in psi (with rather rapid, not slow increase of pressure in the pipe).
Hope this helps.

RE: SDR 26 Pipe, Burst and Collapse

Using the equation from the Plastics Institute I get an MAWP of SDR-26 built out of ASTM 3408 of 64 psig in water at 73°F and for natural gas at 100°F I get 16 psig. If I use the new "Vestimid" HDPE I get 128 psig and 32 psig respectively.

Not sure where the 160 psig comes from but I wouldn't believe it.

Burst pressure is a number that you can't really calculate since it is absolutely temperature and batch dependent. There are equations for collapse pressure, but I don't have them handy.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.

RE: SDR 26 Pipe, Burst and Collapse

Are you referring to PVC pipe?

ASTM D2241 PRESSURE PVC PIPE is the standard. The burst pressure is 500 psi. Here is the link to the data from one manufacturer with the appropriate ASTM standards listed:

http://www.jmeagle.com/pdfs/2008%20Brochures/IPS%2...

RE: SDR 26 Pipe, Burst and Collapse

Sorry, I'd never seen PVC spec'd as SDR. Obviously it is just that I've never seen it since it is clearly on the link bimr provided.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.

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