Fire Extinguisher Clyinder Pressure Test
1. Scope
This guideline specified the cylinder test method and evaluation for the fire
extinguisher cylinders.This guideline is suitable to the pressure test for fire
extinguisher cylinder designed and manufactured as per EN3-3 ,
2. Test Facilities
2.1 Air compressor.
2.2 Cylinder filling device and test fixture.
2.3 Leakage test water tank. The water shall be clean, transparent, no suspending substance.
2.4Pressure gauge, the precision shall be higher than grade 1.5, ranged with 4 Mpa
3. Sampling Requirement and Test Procudure
3.1 This pressure test shall test the cylinders one by one;
3.2 Connect and tighten the cylinder to the connector of the test fixture;
3.3 Open the air valve, fill the compressed air to 2.6 Mpa(370 Psi), close the valve;
3.4 Submerge the cylinder into the water in the water tank, the water level shall be 5 cm (1.97")higher than
the cylinder top. Hold the cylinder under the water with the pressure for 30 seconds, carefully observe if there
is any leak bulbs and abnormal phenomenon.
3.5 Open the air valve to release the pressure. When the pressure reduced to 0, open the fixture and lift the Bitmap cylinder out of the water;
3.6 Demount the cylinder form the fixture. 
4. Evaluation
Qualification standard: Under 2.6 Mpa (300psi), no leakage and visual deform is observed, then cylinder is considered qualified, otherwise, it is not qualified and and shall be rejected.
5. Record the test result.
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