Low expansion where the bubble expansion ratio is small less than 20 to 1 and the bubble contains a high water content.
Foam fire suppression system design calculation.
Foam pump design information.
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.
Storage tank protection with high flow monitors.
Supplementary protection systems are designed to cover the.
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.
Technical information and illustrations.
Area can be calculated by multiplying the length by the width of the spill.
Dike and spill.
Area x critical application rate car x eduction rate er x 15 foam concentrate needed.
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.
Foam fire extinguishing system calculations excel sheet.
The major basis of the description that follows is nfpa 11 standard for low medium and high exapnsion foam.
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.
Foam systems come in two types as follows.
These can also cause major accidents.
Converting existing water sprinklers to foam.
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.
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.
Sometimes it becomes tough to detect a fire in rim seal system especially when the floating roof is at its lowest level.
The formula for calculating the needed foam concentrate at a flammable liquid release is as follows.
Diverse design capabilities while upholding the highest level of fire protection engineering principles is what separates janus from our competition.
Area refers to the area the spill occupies usually in square feet.
A combination of an automatic sprinkler system and a low level high expansion foam system.
Fixed or semi fixed fire protection systems for storage tanks.
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.
