Tank Plate changing
Tank Plate changing
(OP)
Dear Fellows,
We’ve a bidding in our gas processing plant for 4 firefighting water tanks, of course no roofs, the contractor winner proposes reduce the welding surface area by using large carbon steel plates than ones on the original designing.
Original: Plate is ¼” thickness x 7.87 ft x 11,61ft – #1 Ring.
Plates are ¼” thickness x 7.87 ft x 19, 68 ft – #1 Ring
Plates are 3/16” thickness x 4, 82 ft x 19, 68 ft – #2 Ring
And so on …
Contractor Proposal: All plates ¼” thickness x 7.87 ft x 11,61ft
Despite it’s more expansive for them.
Can anyone point some trouble? I want to accept, but I ‘d listen from you first.
Best Regards.
LuizSouza
We’ve a bidding in our gas processing plant for 4 firefighting water tanks, of course no roofs, the contractor winner proposes reduce the welding surface area by using large carbon steel plates than ones on the original designing.
Original: Plate is ¼” thickness x 7.87 ft x 11,61ft – #1 Ring.
Plates are ¼” thickness x 7.87 ft x 19, 68 ft – #1 Ring
Plates are 3/16” thickness x 4, 82 ft x 19, 68 ft – #2 Ring
And so on …
Contractor Proposal: All plates ¼” thickness x 7.87 ft x 11,61ft
Despite it’s more expansive for them.
Can anyone point some trouble? I want to accept, but I ‘d listen from you first.
Best Regards.
LuizSouza





RE: Tank Plate changing
A good bit of the cost of the finished tank is in the welding. If they can buy larger plates at a slightly higher price, they can quite likely offset that price by labor savings.
Normally, larger plates with less welding are considered an improvement in the finished product. Using 1/4" plate in lieu of 3/16" would be considered advantageous.
It's not entirely clear from your post how the final plate sizes will run. On larger tanks, 8' wide plates x 32' to 40' long are fairly typical. Exact lengths used will depend on the shop set-up and tank diameter.