Dismantling Mahour - refinary plants

Generaly speaking dismantling of equipment, pipes and similar; should be quicker than erecting. Therefore apply a factor like 0.75 to your erecting times depending on complexity.
In my experience the timing usually works out to be the same and in some cases longer once you factor in the "buggeration factor’s" of cutting pipes in close proximity to others you do not want to remove, steaming out of pipes that need to be removed (making safe), undoing bolts that do not want to come loose, obtaining permits, etc.

I actually worked on a plant a few years ago that was dismantled and reassembled eslewhere and after close examination of the equipment and especially the pipework most of it had to be replaced due to unexpected corrossion that had taken place. Redesign of the new plant made the balance of the piping that could be resused un-reusable anyway without cutting and rewelding to the new design.

Cheers.
P.S. Not very helpful I know but though I would contribute anyway.

We have a tool for developing a conceptual cost estimate for the construction of a new methanol plant based upon John Page’s work, but it does not estimate manhours nor demolition work.

I know a consultant in Louisiana who has a lot of experience in this area (demo & reconstruction of plants). PM me if you would like his contact info.

Bernard Ertl
InterPlan Systems