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The product couldn't be that important if they can't afford at least another 2" line. The cost of the line is peanuts compared to tankage. Can't they flush these lines with solvent to a slop tank?
I've done something similiar to this with Treated and Untreated HGO & LGO & Naptha.
We valved the manifolds and used temporary lines while the tanks switched service and a revamp. We flushed the tanks but not the lines.
If you are pigging don't forget to make all valves full port. It should indicate that on the P&ID's.
The product couldn't be that important if they can't afford at least another 2" line. The cost of the line is peanuts compared to tankage. Can't they flush these lines with solvent to a slop tank?
I've done something similiar to this with Treated and Untreated HGO & LGO & Naptha.
We valved the manifolds and used temporary lines while the tanks switched service and a revamp. We flushed the tanks but not the lines.
If you are pigging don't forget to make all valves full port. It should indicate that on the P&ID's.
I had a similar issue at a fish oils plant. They were using a common header system to run various products from one tank to another. They were cheap so they had only two headers meaning only two simutanious operations could be done at any one time even though they required more. Thats the result of being cheap. Instead of a pig sending/receiving barrels they used pigging valves because they took up alot less space. Something to consider maybe. To create a proper header system you really need to know the process and how the operators change tanks. They had hoses everywhere and no one knew what was going on. it was a nightmare