When an internal floating roof tank is converted into a vaulted roof tank, the tank needs to be recalculated – should the new standards or the old standards be applied?
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The internal floating roof tank is to be converted into an arch roof tank, and the tank parameters need to be recalculated. Should the calculation be done using the old standard 50341, or the new standard 50341? The new 50341 requires additional anchoring. Thank you, everyone!
It must have been calculated according to the new standards, but there is a problem here regarding anchoring. Under the new standards, if a fixed roof together with a vent valve is used, the calculations will not hold up when the pressure reaches a certain level. To comply with the new standards, it is necessary to add additional anchoring measures or reduce the set pressure of the vent valve. All these measures go against common sense. Some design institutes follow the standards strictly, while others believe that the standards themselves are flawed and ignore them altogether. So things are a bit chaotic now; I wonder how everyone handles such problems?
I’m facing this problem right now. How exactly should it be handled?
This issue is not only a problem related to your project, but also a problem affecting all projects as well as the company as a whole; it should be decided by your technical leader.
Converting internal floating roof tanks into arch roof tanks is feasible for Class C materials; however, for armored or Class B materials, the fire separation distances are not appropriate.