REPAIRS TO RIVETED VERTICAL STORAGE TANKS
REPAIRS TO RIVETED VERTICAL STORAGE TANKS
(OP)
I am in the process of repairing a Riveted Tank which id 55 years old. Tank shell and bottom plates are in good shape but there are few areas in the bottom to Shell connection that is leaking.
There ia no possibility of re-riveting as riveting equipment and expertise is not available in Sri Lanka.
Is there any other techninique we can use in this situation. We are planning to use SIGM "novaguard" paint at 1000 micron thickness over the entire rivet line so as to farm a barrier against leaks. Will this work.
Thank you
Gamma
There ia no possibility of re-riveting as riveting equipment and expertise is not available in Sri Lanka.
Is there any other techninique we can use in this situation. We are planning to use SIGM "novaguard" paint at 1000 micron thickness over the entire rivet line so as to farm a barrier against leaks. Will this work.
Thank you
Gamma
RE: REPAIRS TO RIVETED VERTICAL STORAGE TANKS
RE: REPAIRS TO RIVETED VERTICAL STORAGE TANKS
THANK YOU VERY MUCH FOR THE RESPONSE.
Dear Sir,
Sorry for not giving more information at the outset
Tank Stores Gas Oil
Diameter = 23.5 meter
Height = 11.7 meter
Tank is Steel, I presume equivalent to ASTM A 36
The Tank is riveted construction.
It had been in service for 50+ years
Bottom shell is 12.5mm and in good shape
Bottom Plate is 9mm and is corroded in areas. We are in the process of repairing and replacing sections that are away from rivet lines
We have conducted a vacuum box test on the horizontals and they are not leaking.
But we feel that the joint Bottom to first shell may have some leaks. This we have not established so far.
However we need to provide some safety against possible leaks once the tank is loaded for hydrotest.
Also we need to maintain the integrity of the riveted connectoion when boublers are being introduced close to the rivet line. Some weld connections are around 10 to 20mm from the rivets
Hope this is adequate
Thank you
Gamma
RE: REPAIRS TO RIVETED VERTICAL STORAGE TANKS
RE: REPAIRS TO RIVETED VERTICAL STORAGE TANKS
RE: REPAIRS TO RIVETED VERTICAL STORAGE TANKS
Dear sir,
Your advice is very helpfull.Thank You again. I will keep you posted on the developments. As adviced I will use TIG welding around the rivets and rivet loine.
Gamma