RSFP the Rim Seal Foam Pourers are used to fight fires taking place at the rim area of the floa ng roof storage tanks. RSFP is equipment which used with low expansion foam and pours it sliding through its special design onto the rim seal area. Its special construc on avoids non desired effects such as the wind which may deploy the expanded foam outside of the protected area. RSFP is based on the principle of LSF type foam makers and used to expand the foam solu on by introducing air into the flow. The applica on of air aspirated foam is based on the risk comprising the area in the annular ring between the rim of the floa ng roof and the tank shell. The Foam system design guidelines generally used in accordance with NFPA 11 standard. Rim Seal Foam pourers are defined by NFPA 11 as Type II discharge outlets to deliver the low expansion aspirated foam to the rim seal area.