Is it necessary to install a flame arrester on the central vent at the top of an internal floating roof tank?
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As stated in the title: SH/T 3007-2014 \"Code for Design of Tank Areas in Petrochemical Storage and Transportation Systems\", clause 5.1.9: 5.1.9 Flame arresters shall be installed on the vent pipes or breathing valves that lead to the atmosphere for the following storage tanks: d) Central vent pipes on the roofs of internal floating roof storage tanks. Question: What is the purpose of installing a flame arrester only on the central vent pipe? Doesn’t an internal floating roof also have ventilation windows? Have you guys installed it?
Dear, of course not. There is an air vent on one side of the tank top
I think there’s no need to install it everywhere; if it’s only installed in the middle and not elsewhere, wouldn’t that be pointless? ?
OP, have you guys made the corrections yet? Our company has also encountered similar problems; according to section 5.2.2 of the \"Guidelines for the Safe Operation of Light Oil Storage Tanks in Petrochemical Companies of China\", a flame arrester should be installed at the central vent on the roof of internal floating roof storage tanks. ”, the same requirements apply ； According to the ‘Technical Guidelines for Light Oil Storage Tanks of China National Petroleum Corporation’, ‘3.4.3 For floating roof storage tanks that do not require sealing, circumferential ventilation openings shall be provided.’ Circumferential vent holes should be provided on the tank wall or fixed roof above the highest designed liquid level ； At the highest point of the fixed-roof center where no airtightness requirements apply, a vent valve should be installed along with a flame arrester. After discussing this with colleagues from refineries, some believe it is necessary to follow the regulations ； Some believe that side ventilation holes (square holes) are of no use if not modified, so it’s better to leave them unchanged.
Is installing a flame arrester on the central vent of an internal floating roof likely to hinder the dilution and dispersion of flammable gases, thereby resulting in the formation of an explosive mixture on the tank top? Are there any cases of fire arresters being installed on the central vent of internal floating roofs?