Hydro Testing of Fire Extinguisher as per IS 2190

Testing of Fire Extinguisher as per IS 2190:2010

The testing of fire extinguishers consists of ahydraulic pressure test and a performance test. Thesetests shall be carried out as per the norms and frequencygiven below.

 

  1. Hydraulic Pressure Test

The pressure test of all types of extinguisher shouldbe carried out at intervals mentioned against eachextinguisher at pressure and for the period mentionedagainst them in Annex E. The hydraulic pressure testingshould be carried out such that atleast one-third (1/3) ofthe extinguishers installed in a premises are tested as perAnnex E every year. If any of the extinguishers fails inthe hydraulic pressure test to meet the requirements givenin Annex E, then after repairs, the extinguisher should besubjected to pressure testing. If it passes the test as perthe requirements mentioned above, the extinguisher shallbe retained and, if it fails, the extinguisher should berejected and condemned as per the procedure and afterrecord the same in the register of fire extinguishers andreplace with new fire extinguishers. On the basis of lifeof extinguisher, the extinguishers shall not be used afterexpiry of its life as given in Annex F.

 

  • Pressure Test Procedure and Safety Precautions

 

  • All valves and internal parts shall be removedand the extinguisher emptied;
  • All traces of extinguishing materials like drypowder/mechanical foam should be removedfrom inside the shell before filling with water;
  • In the case of externally mounted gascartridges/containers for higher capacity drypowder extinguishers, the cartridge/containermust be removed and shell opening besuitably plugged;
  • The hose of the hydrostatic test pump is thenattached to the flexible connection to thedischarge nozzle, hose assembly or test fitting,as the case may be;
  • The extinguisher should then be placed in asuitable protective test cage or behind aprotective shield/barrier before applying thetest pressure;
  • The cap or the test fitting, as the case may be,must be tightened slowly while the watersupply remains open. When all the entrappedair within the shell has been bled off, andwater emerges the cap/test fitting must betightened fully;
  • Pressure is then applied slowly so that the testpressure (as given in Annex E) is reachedslowly within 1 min, and maintained for theduration of 2.5 min. Observation are madeabout distortion or leakage of the extinguisherbody; if any.
  • After hydraulic testing, all traces of water andmoisture must be removed from dry powderand stored pressure extinguishers preferablyby use of a suitable cylinder dryer taking carethat the temperature within the shell does notexceed 65ºC.

 

  1. Discharge Test

All extinguishers installed in a premise irrespective ofbeing use in a live fire condition shall be subjected toan operational test as per the frequency of testing givenin Annex D. The operational test should be carried outin such a frequency, keeping in view the frequencygiven in Annex D for type of the extinguisher, inannually cyclic manner so that all the extinguishersinstalled in a premise are subjected to discharge test.If more than 10 percent of the extinguishers, subjectedto discharge test fail during the testing, then all theextinguishers installed in the premises shall besubjected to the discharge test.

 

  1. Gas Cartridge

In case of gas cartridges, if there is loss of more than10 per cent of original mass, these should be sent forrecharging and replaced with fresh charge. At the timeof recharging the cartridge, the cartridge should betested for hydrostatic test according to the provisionsof IS 4947 and should be re-used only subject topassing of requirement.