×
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

Pipeline Stacking Calculation

Pipeline Stacking Calculation

Pipeline Stacking Calculation

(OP)
Re concrete coated Pipeline Stacking calculation:
 
Question A) To calculate concrete crushing effect between pipelines, how much is the effective contact length? (I am heard due to concrete nature, the whole length of concrete does not contact with its counterpart concrete) (I use Roark formulation for contact effect of cylinder on cylinder)

Question B) To calculate stress in steel pipe (coated with concrete), How should the stress distribution in steel pipeline be calculated? (I understand API RP 5LW is not used for stress in steel pipe coated with concrete)
 

RE: Pipeline Stacking Calculation

Pipes are not usually stacked in contact with each other.  They will be placed on a truck with saddled spacers.  Therefore a pipe will only make bearing contact against the width of the spacing elements.

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

RE: Pipeline Stacking Calculation

(OP)
thanks, however kindly note that stacking is relevant to concrete coated pipeline carriage by cargo barge or stacking on the laying barge. in this case i understand wood bearing strip is used to avoid direct contact between pipe and deck.

however, in pipe stacking calculation the following cases should be checked:

case 1) contact between concrete and concrete (worst case the bottom pipe row and the penultimate row)

case 2) contact between concrete pipe and deck (without wood timber) (worst case between bottom row and the wood) (this is just for information because in reality this leads to undesirable results and as such it is concluded that below case 3 to be used)

case 3) contact between concrete pipe and wood bearing strip on deck (worst case between bottom row and the wood)

case 4) steel pipe capacity against the loads

case 5) deck capacity (force per unit area) to carry load

my question is relevant to effective contact length for above cases 1 & 2 (for case 3 the effective length is bearing length of wood strip)

(i have used DAF to consider the effect of pipe dynamic movement as well)

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