METHOD STATEMENT ON FIRE EXTINGUISHERS HYDROSTATC

CRYOGENICS
METHOD STATEMENT ON FIRE EXTINGUISHERS
HYDROSTATC PRESSURE AND CONDUCTIVITY TESTS.
HYDROSTATIC PRESSURE TEST BASED ON NFPA 10
CHAPTER 8.
1. All traces of extinguishing material shall be removed from the inside
of cylinder shells before filling with the test liquid.
2. The cartridges, and some cartridge receivers of the extinguishers
having externally mounted gas cartridges, shall be removed and a suitable
plug inserted into the shell opening at the point of removal.
3. All hose shall be removed from cylinders prior to hydro-static testing.
4. On all wheeled dry chemical, dry powder, hydrogenated agent,
AFFF/FFFP, and carbon dioxide extinguishers equipped with a shutoff
nozzle at the outlet end of the hose, the hose (complete with couplings but
without the discharge nozzle) shall be removed and tested separately.
5. On all wheeled stored pressure dry chemical extinguishers, the head
assembly is to be removed and be replaced with a suitable test bonnet.
6. The hose of the hydro-static test pump is then attached by the flexible
connection to the discharge nozzle,hose assembly, test bonnet, or test
fitting, as is applicable. In the case of wheeled dry chemical and dry
powder extinguishers, procedures and fittings should be those
recommended by the manufacturer.
7. The test liquid (Water) supply to the test pump is to be turned on and
the extinguisher then filled to the top of its collar. Air or other gases shall
not be used as the sole medium for pressure testing.
8.For extinguishers tested with their cap in place, the cap must be
tightened SLOWLY while the test liquid supply remains open. When all
of the entrapped air within the shell has been bled off and after test liquid
emerges,the cap must be tightened fully.
9.For extinguisher tested with a test bonnet or fitting, the bonnet or fitting
must be tightened FULLY while the water supply remains open. When all
of the entrapped air within the shell has been bled off and after test liquid
emerges, the vent must be closed tightly.

CRYOGENICS
10. Pressure is then applied at a rate-of-pressure rise so the test pressure is
reached in not less than 30 seconds. This test pressure is maintained for at
least 30 seconds. Observations are made at this time to note any distortion
or leakage of the extinguisher shell.
11. If no distortion or leakage is noted and if the test pressure has not
dropped, the pressure on the extinguisher shall be released. The
extinguisher is then considered to have passed the hydro-static test.
12. All traces of test liquid and moisture must be removed from
extinguisher cylinder shells.
13.Any extinguisher shell that fails this hydro-static test shall be marked
“CONDEMN” must be destroyed by the owner or at the owner's
discretion.
ON TEST CERTIFICATE.
1. Low Pressure D.O.T Cylinders. Extinguisher shells of low pressure
D.O.T. cylinders that pass a hydro-static test shall have the test
information provided in accordance with D.O.T/NFPA 10 requirements
and recorded on a suitable metallic label or equally durable material. The
label shall be affixed by a heat-less process to the shell. These labels shall
be self-destructive when removal from an extinguisher shell is attempted.
The label shall include the following information:
1.1 Month and year the test was performed, indicated by a perforation,
such as by a hand punch.
1.2 Test pressure used.
1.3 Name, address and license number (E#) of the concern.
1.4 A written or electronic log shall be maintained of all low-pressure
(non-D.O.T.) cylinders which are hydro-statically tested. The log
information shall be patterned after the D.O.T. recording requirements
and shall include, but will not be limited to: the date, location of
extinguisher, type, rating, brand, serial number and the name and EE# of
individuals performing the service and the E# of the company they work
for. This log shall be made available for a period of 13 years.
1.5 Hose assemblies passing a hydro-static test do not require recording.

CRYOGENICS
CO2 HOSES CONDUCTIVITY TEST BASED ON NFPA 10
CHAPTER 7.4.
A definition for “conductivity” is “the property or power of conducting
heat, electricity or sound.” This pertains to CO2 hoses in that the wire
strands inside the hose must be connected and in good shape from one
end of the hose to the other. There are many ways to measure
conductivity. You can use a meter that is used in the electrical industry,
remove hose from the extinguisher, put meter setting on OHM or
Continuity, touch one end on the metal with one prong and the same on
the far end with the other prong, any reading other then “0″ is a fail. Most
commonly used in the US is a small unit that is battery operated with a
metal point and LED light. You grab one end of the hose by the metal and
touch the other end of the hose with the pointed tip. If the light comes on
you have continuity from one end to the other. What that conductivity test
doesn’t tell you is how many of those strands are connected or if they are
in good shape. After examining the hose we also determined that the
rubber that is the outside protective layer for those strands appeared to be
in good shape. No weather checks, cracking, or bulges to lead us to
believe that there was a problem under the surface. They were still in
good enough shape to allow for a “passing” conductivity test but not good
enough to withstand the cold and back pressure within the hose when the
discharged CO2 gas hit the diverter at the end of the hose. So what should
someone performing annual maintenance in such a situation do? Even
after fulfilling all the requirements for the proper servicing and testing of
a CO2 hose, it would be good to take one or two more steps. You need to
grab that hose with both hands, leaving about three to four inches
between your hands, and flex that hose. Keep moving your hands down
the hose until you have done the entire length of hose. If you come across
a crack or hard spot that maybe you couldn’t see without flexing the hose
or hear a crunching-type noise then you will know that the hose you are
visually inspecting is deteriorating under the rubber protective layer. This
would be a good time to replace that hose.

JAN FEB MAR APR MAY JUNE
5  6 YRS. MAINTENANCE.
TESTER
HYDROSTATIC TEST
JULY AUG. SEPT. OCT. NOV. DEC.
1 2 3 4 5 6 7 8 9 0
1 2 3 4 5 6 7 8 9 0
1 2 3 4 5 6 7 8 9 0
{
TESTED
TO (PSI)
|
20
RC 646805
CRYOGEN CSI
ENGINEERING SERVICES NIGERIA LTD
BYAZHIN / KUBWA OFFICE: 88 Ahamed Kyana Street, P.O Box 79 Kubwa. Abuja.F.C.T 901101
Tel: [phone]
3
5
12 YRS

FIRE EXTINGUISHERS HYRDOSTATIC TEST RECORD CRYOGENICS
EXTERNAL AREAS
S/NO TAG NO TYPE LOCATION MANUFACTURER
S NAME
DATE OF
MAN
HYDROSTATIC PRESSURE TEST REMARK
DATE DONE PRESSURE
USED(PSI)
TEST
DURATION
(MIN)
PASS/FAIL NEXT DUE
DATE
24 035 9 KG DCP Power House outside UNKNOWN NA NO 365 1 pass 13/11/2029
25 036 9 KG DCP Power House outside UNKNOWN NA NO 365 1 pass 13/11/2029
26 037 2 KG CO2 Power House outside UNKNOWN NA NO 3600 1 pass 13/11/2029
27 038 9 KG DCP Inside Power House UNKNOWN NA NO 365 1 pass 13/11/2029
28 039 9 KG DCP Inside Power House UNKNOWN NA NO 365 pass 13/11/2029
29 040 9KG DCP Inside Power House UNKNOWN NA NO 365 1 pass 13/11/2029
30 041 9KG DCP Inside Power House UNKNOWN NA NO 365 1 pass 13/11/2029
31 042 5KG CO2 Inside Power House UNKNOWN 2017 NO 3600 1 pass 13/11/2029
32 043 5KG CO2 Inside Power House UNKNOWN 2018 NO 3600 1 pass 13/11/2029
33 044 5KG CO2 Inside Power House UNKNOWN NA NO 3600 1 pass 13/11/2029
34 045 9LTRS FFP Inside Power House UNKNOWN 2013 NO 365 1 pass 13/11/2029
35 046 9KG CO2 Store for replacement UNKNOWN 2018 NO 3600 1 pass 13/11/2029
36 047 9KG CO2 Store for replacement UNKNOWN 2018 NO 3600 1 pass 13/11/2029
37 048 9KG DCP Auto workshop UNKNOWN NA NO 365 1 pass 13/11/2029
38 049 9KG DCP Auto workshop UNKNOWN NA NO 365 1 pass 13/11/2029
39 050 9KG DCP Auto workshop UNKNOWN NA NO 365 1 pass 13/11/2029
40 051 9KG DCP Engineering store UNKNOWN NA NO 365 pass 13/11/2029
TESTED BY: AHAMED KYANA
COMPANY:CRYOGENICS ENG. SER. NIG.LTD.KUBWA. ABUJA
DATE:13 November 2023