Roof Plate Welding
Roof Plate Welding
(OP)
Hi All,
I would like to ask a question regarding roof plate welding.
Currently we can not convince our consulting company. we designed roof plate overlapped each other in 50mm gaps and its welding is single side at the upside only. According to API650 ,single weld is applied and it is adequate. But Consulting forces us to apply double side welding both upside and downside welding. They claim that due to corrosion effect ,double side is wanted also at downside.
How can i convince them?
Your comment is appreciated...
(Note: Tank is water tank,roof plate thk=6mm(including 1mm corrosion allowance) ,Roof will be coated by 300 microns paint)
I would like to ask a question regarding roof plate welding.
Currently we can not convince our consulting company. we designed roof plate overlapped each other in 50mm gaps and its welding is single side at the upside only. According to API650 ,single weld is applied and it is adequate. But Consulting forces us to apply double side welding both upside and downside welding. They claim that due to corrosion effect ,double side is wanted also at downside.
How can i convince them?
Your comment is appreciated...
(Note: Tank is water tank,roof plate thk=6mm(including 1mm corrosion allowance) ,Roof will be coated by 300 microns paint)





RE: Roof Plate Welding
RE: Roof Plate Welding
RE: Roof Plate Welding
RE: Roof Plate Welding
RE: Roof Plate Welding
I have the same comment as FTank. Your Client is right. It is not a strength issue. If the tank roof is internally coated, all joints must be seal welded. Otherwise, the unsealed area will be the source for future corrosion and will waste the effort and cost for internal coating. This is pretty much covered by many tank coating specifications. Note that you also have to seal the roof to shell compression ring joint with a caulking after coating.
RE: Roof Plate Welding
Any information on internal lining will be appreciated.
Geodesic dome roof tanks: are they widely used in water service?
Cheers!