Foam Fire Suppression System Design Calculation

Foam fire extinguishing system calculations excel sheet.

Foam fire suppression system design calculation.

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. Low expansion where the bubble expansion ratio is small less than 20 to 1 and the bubble contains a high water content. Storage tank protection with high flow monitors. Sometimes it becomes tough to detect a fire in rim seal system especially when the floating roof is at its lowest level.

A fire in this area can result from leaking valve or tank or fractured pipe. A medium expansion foam system can protect the walls from fire and vapor suppression. These can also cause major accidents. 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.

A combination of an automatic sprinkler system and a low level high expansion foam system. Diverse design capabilities while upholding the highest level of fire protection engineering principles is what separates janus from our competition. Area can be calculated by multiplying the length by the width of the spill. The major basis of the description that follows is nfpa 11 standard for low medium and high exapnsion foam.

Technical information and illustrations. Foam is a soft substance that is added to the water with a percentage of 3 to 6 this substance separates the surface of the fire from the air and thus reduces the oxygen level by 15 and then the fire is extinguished. Clean agent suppression systems utilizing 3m novec 1230 fire protection fluid fm 200 suppression systems carbon dioxide co2 suppression systems foam suppression systems. Foam pump design information.

Supplementary protection systems are designed to cover the. Dike and spill. Converting existing water sprinklers to foam. The formula for calculating the needed foam concentrate at a flammable liquid release is as follows.

Area refers to the area the spill occupies usually in square feet. Area x critical application rate car x eduction rate er x 15 foam concentrate needed. 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. Fixed or semi fixed fire protection systems for storage tanks.

Foam systems come in two types as follows.