Do internal floating roof tanks require a nitrogen seal? Is exhaust recovery needed?
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1. Does a internal floating roof tank require a nitrogen seal? If a nitrogen seal is added, is it necessary to install exhaust gas recovery? 2. Which standard shall be used as the basis? 3. If a nitrogen seal is used, is exhaust gas recovery a requirement for environmental protection?
In accordance with the requirements of Article 4.2.9 of SH/T3007-2014
The internal floating disk serves to suppress the evaporation of the medium, while nitrogen protection prevents the oxidation of the medium and also provides safety benefits. Generally, internal floating roof storage tanks do not require a nitrogen seal; installing one is very troublesome and incurs significant additional costs. Nitrogen pipelines, regulating valves, oil and gas recovery systems, flame arresters, etc. The operating cost of nitrogen is also high, at around 0.7 yuan per cubic meter. Choose a good internal floating disk, and there will be no need for nitrogen sealing or oil vapor recovery.
According to current environmental regulations, exhaust gas needs to be recovered, and using a nitrogen seal is safer
Internal floating roof storage tanks require a nitrogen blanket, and when such a blanket is in place, waste gas recovery is necessary