Foam Fire Suppression System Design Calculation

The formula for calculating the needed foam concentrate at a flammable liquid release is as follows.

Foam fire suppression system design calculation.

These can also cause major accidents. Diverse design capabilities while upholding the highest level of fire protection engineering principles is what separates janus from our competition. Area x critical application rate car x eduction rate er x 15 foam concentrate needed. 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.

Converting existing water sprinklers to foam. Technical information and illustrations. Area can be calculated by multiplying the length by the width of the spill. 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.

A fire in this area can result from leaking valve or tank or fractured pipe. 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.

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. Supplementary protection systems are designed to cover the. Low expansion where the bubble expansion ratio is small less than 20 to 1 and the bubble contains a high water content.

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. 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. Storage tank protection with high flow monitors. 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. Dike and spill. A combination of an automatic sprinkler system and a low level high expansion foam system. Area refers to the area the spill occupies usually in square feet.

Fixed or semi fixed fire protection systems for storage tanks.