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Overage length laydown and expansion loops

Overage length laydown and expansion loops

Overage length laydown and expansion loops

(OP)
I've been asked about a 2km long umbilical and what "overage" and the size of expansion loops at one end are required.

I heard that ordering 1% over the point to point length is appropriate and it's dependent on seabed topography.

What codes have anything on this? Is 1% too much?

Thanks

RE: Overage length laydown and expansion loops

You can't just say 1% without due regard for the length alone not to mention topography and details of end connections too.  Example 1% of 100 meters = 1 meter.  Not going to be able to do much with that 1 meter length.

**********************
"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: Overage length laydown and expansion loops

Zoomi, the overlength required is the the pull in though the J-tube, you could get the actual lenght from the J-tube lenght + the lenght required for tie-in + the slack required for laydown. Your pipeline engineering performing the J-tube pull-in analysis could provide this.

Narendranath R
Pipeline engineering is made easy with state of the art computer software, visit www.narendranath.itgo.com.

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