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rim seal (NFPA 11) foam systems for fixed roof inner floater storage tanks

Question asked by anneke.altena-veenstra on Dec 22, 2016

In the Netherlands the authorities are no longer allowing rim seal (NFPA 11) foam systems for fixed roof inner floater storage tanks. Due to environmental requirements open vents are not allowed anymore. The NFPA 11 does not mention these closed type storage tanks with only P/V vents. What is your experience?

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