Overage length laydown and expansion loops

[zoomi]

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

 

[BigInch]

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.

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[narenr]

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
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