Oil and water storage tanks Bottom plate Replacement

[Satish Silimkar]

Dear All,

I am working in oilfield. Our company is trying to get some new job and it's very good opportunity and new work for us. We have to replace the bottom plate of oil and water storage tanks. I have done research and had many discussion with few experts whom i know. I am here to get more information about it. We have various size of tanks which starts from 9 meter Dia to 36 meter dia tanks respectively height is from 5 meter to 15 meter. I have found two method for replacing the existing bottom plate which is as follow.
1. Hydraulic Jack Lifter
2. Double Bottom.

From above this two method Hydraulic jack lifter method is expensive and time taking method for this job while Double bottom is less expensive and very less time consuming.
I want to get more details about these two method so, if anyone have any information like Detail Procedure or any kind of reference document then kindly please share with me and also give your ideas about the same so, we can execute this job smoothly.

It would be appreciated and will be thankful to you for this.

BR,
Satish

 

[bimr]

Once the tank is safe for welding, the general practice is to first cut out a panel for access to the tank.

Then, C clips are welded around the tank perimeter base to hold the tank shell while the bottom is being replaced. Next, a cutting torch on a track rotates around the tank to cut off the bottom at the c clip. The new bottom plates are slipped under the tank and welded.