Foam System Fire Fighting

Materials and Specifications of Structures of Foam Bladder Tank

1) The bladder tank body is made of 20# high quality carbon structural steel (under codes and standards

of China and ISO, detailed contents are: C :0.17~0.24; Si:0.17~0.37; Mn:0.35~0.65; S :≤0.035; P :≤0.035; Cr:≤0.25; Ni:≤0.25; Cu:≤0.25). This kind of steel is suitable for the welding and construction of tanks for fire fighting foam proportioning system utility.
2) Bladder in nitrile butadiene rubber and polyester, available of the tensile strength that ensures no

ruptures under operation conditions.
3) Main valves are made of corrosion resistant stainless steel.
4) Pipe networks made of seamless steel pipe. The inlet and outlet of ratio controller will be in DN100 (4")

with a pressure from 6 bar up to 12 bar.