Foam compound  delivery rates in accordance with
DIN 14 493 Sections 1-4
for stationary/  foam fire extinguishing installations

Fire extinguishing installation	Low- expansion foam	Medium- expansion foam	High- expansion foam
Object	Water flow rate in litres / minute  & /m²**		Desired flooding time in min., ER > 200**²
Fire class A
-Materials with a low  density			4
-Materials with a high density			5
-Materials in  boxes/packaging			6
-Plastics, tyres, bulk materials			6
Fire class B ¹
Flash  point < 55°C			3
Flash point >55°C			4
Fixed  cover tanks  Ø< 20 m also with floating cover	6.6	3
Fixed  cover tanks Ø > 20 m	6.6 + 0.2	3 + 0.2
Floating cover tank with annular gap foam delivery	6.6	2
Collecting area with with vertical  container	3.3
Collecting area with with horizontal container	6.6
Tanks  and collecting areas for polar fluids	6.6 + X *	Water flow rate x X*

¹	Does not apply to hydrophilic fluids
²	Additional calculation factors must /be  taken into account to determine the foam compound requirement for high-expansion foam fire extinguishing installations.
*	If necessary, tests must be carried out to determine the increase in the water flow rate due to the des! truc tion of foam by the polar  fluid.
**	The  foam compound consumption in litres / minute is calucated from the water flow  rate in litres per minute and the addition percentage.