What is the standard capacity of a portable foam extinguisher under this code?

The standard capacity specified is 9 litres (Clause 5.1).

What fire classes is this extinguisher designed for?

It is designed for Class A (solid combustibles) and Class B (flammable liquids) fires, with a minimum rating of 2A and 21B respectively (Table 2).

What is the required hydrostatic test pressure for the cylinder?

The extinguisher body must withstand a hydrostatic pressure of 3.5 MPa for 2.5 minutes without leakage or visible distortion (Clause 10.1).

What is the minimum discharge time for a 9-litre foam extinguisher?

The minimum effective discharge time must be 60 seconds (Table 2).

IS 10204

: 2001

Specification for portable fire extinguisher mechanical foam type

CurrentFrequently UsedSpecificationFire Safety · Fire Fighting

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This standard lays down the requirements for material, construction, performance, and testing of portable mechanical foam type fire extinguishers, primarily of 9-litre capacity. It covers the specifications for the extinguisher body, foam concentrate, performance on Class A and B fires, and marking.

Specification for portable fire extinguisher mechanical foam type

Quick Reference Values

Standard Capacity9 litres

Hydrostatic Test Pressure3.5 MPa

Minimum Effective Discharge Time (9L)60 seconds

Minimum Fire Rating (9L)2A, 21B

Body Sheet Thickness (Mild Steel)1.60 mm

Body Sheet Thickness (Stainless Steel)1.25 mm

Burst Pressure5.5 MPa

Practical Notes

Mechanical foam extinguishers are effective on Class A (solids) and Class B (flammable liquids) fires, but are not suitable for use on live electrical equipment due to their water content.

The foam concentrate must comply with IS 4989, and it is crucial to use the correct type (e.g., AFFF) as specified by the manufacturer.

Regular maintenance as per IS 2190 is essential, including checking for corrosion, blockages in the nozzle, and ensuring the charge is correct.