Foam Fire Suppression System Design Calculation

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Foam fire suppression system design calculation.

A combination of an automatic sprinkler system and a low level high expansion foam system. A fire in this area can result from leaking valve or tank or fractured pipe. Taking into consideration this minimum density the foam solution shall be designed to discharge for a period of 10 minutes over the entire system s area for deluge and spray foam water systems and over the design area design area is equal to 465 square meters in accordance with paragraph 7 3 7 1 of nfpa 16 for wet pipe dry pipe and preaction foam water systems. There shall be sufficient high expansion foam concentrate and water to allow continuous operation of the system at the design density for 25 minutes or to generate 4 times the submergence volume whichever is less but in no case less than enough for a 15 minute discharge.

If fire protection option 1 is used a foam water deluge system in hangars housing aircraft with a wingspan area of greater than 3 000 square feet supplemental protection is also required. A medium expansion foam system can protect the walls from fire and vapor suppression. Fixed or semi fixed fire protection systems for storage tanks. Storage tank protection with high flow monitors.

Foam fire extinguishing system calculations excel sheet. Converting existing water sprinklers to foam. Clean agent suppression systems utilizing 3m novec 1230 fire protection fluid fm 200 suppression systems carbon dioxide co2 suppression systems foam suppression systems. Area x critical application rate car x eduction rate er x 15 foam concentrate needed.

Sometimes it becomes tough to detect a fire in rim seal system especially when the floating roof is at its lowest level. Foam pump design information. The formula for calculating the needed foam concentrate at a flammable liquid release is as follows. Dike and spill.

Area refers to the area the spill occupies usually in square feet. The major basis of the description that follows is nfpa 11 standard for low medium and high exapnsion foam. Foam systems come in two types as follows. We provided you with a calculation excel sheet below contains all calculation to design a foam fire suppression system download it now for free and don t forget to download also all firefighting calculation sheets.

Medium and high expansion where the expansion ratios are greater from 20 to 1 up to 1 000 to 1 at these expansion ratios the bubble water content is low and the bubble is relatively light. Low expansion where the bubble expansion ratio is small less than 20 to 1 and the bubble contains a high water content. These can also cause major accidents. For newcomers to loss prevention nfpa is the acronym for national fire protection association of the united states a premier and world renowned agency for development of standards regulations and guidelines in fire protection.

Area can be calculated by multiplying the length by the width of the spill.