Method Statement for Testing & Commissioning Of Foam System

Before commissioning the foam system the following shall be ensured.

• The system has been checked against the approved installation drawings.
• The pressure testing of the pipes are completed.
• The installation of foam bladder tank, Deluge valve, Ratio Flow Controller, Isolation valves, associated pipe works, and Controller Panel completed.
• The installations of foam / water open sprinklers are completed.
• The Termination to all devices (i.e. Pressure Switch, Solenoid, etc…) is completed.
• Cabling and interface connection to main fire alarm panel is completed.
• Make sure the entire above test / installation is approved by consultant.
• Check and confirm that deluge valve and accessories are ready for putting the system in service.
• Confirm that the pressure control valve set to the system required pressure.
• Check that all sprinklers are free from obstructions.
• Confirm that check valves are installed at the correct flow direction.

Commissioning Steps for Foam System

Prior to Commissioning of the Foam Bladder Tank confirm the following:

• No fault signals exist on the Fire alarm control panel.
• Fill the tank with the required quantity of the foam concentrate.

Commissioning of deluge valve
Following procedure shall be adopted for commissioning of the deluge valve to set the system live:

1. Confirm that the main line is flushed with clean water and pressurized and all valves are on their operating positions.
2. Confirm that the concentrate isolation valve to the protected room is closed and test connection isolation valve open.
3. Open valve to pressurize the diaphragm chamber and the detection line system.
4. Slowly open the water control valve. Close the main drain valve as soon as water discharges from the drain connection. Observe that drain valve have no flow.
5. Open the end line drain valve for the testing.
6. The deluge valve detects the pressure drop and will activate the system.
7. The water supply pressure forces the centre valve open permitting the water flow in to the bladder tank and through the foam proportioner to discharge water through the test & drain valve fixed with foam discharge nozzle.
8. If the desired water flow is achieved, we can now then add the foam concentrate by opening valve.
9. Collect foam sample from test connection and send to laboratory for testing.
10. Foam test report to be submitted to the consultant for approval.
11. After the test is over shut off valve, flush the pipes with clean water, drain the pipes, and reset the DV.
12. Close the drain valve completely.
13. Fill the foam tank to the required level prior to placing the system in service.

a) Interface with Fire Alarm System: When the foam is discharged from the foam system, the main fire alarm system will be activated after 60 second.

b) Manual release testing.

c) Placing the system in the service.

d) Reset the deluge valve after the test as below.

• Close the diaphragm chamber supply valve of the Deluge.
• Close the water control valve.
• Open the drain valves. Leave the drain valves open.
• Operate the manual release station to make sure all water is drained from the diaphragm chamber before closing.
• Recheck the end line drain valve cleaned properly.
• Open the Diaphragm chamber supply control valve and allow time for full pressure to build up in the diaphragm chamber, resetting the Deluge valve.
• Slowly open the water control valve. Close the main drain valve as soon as water discharges from the drain connection. Observe that drain valve have no flow.
• Now DV valve is reset, close drain valve and open water control valve.
• Open the concentrate isolation valve and manually reset hydraulic concentrate control valve to closed position.
• DV is back in service

HSE Requirements:

• Work will commence as per safety regulations laid down in the contract specification and project safety plan.
• Safety gears shall be used. All personal protective equipment shall be used as appropriate according to the nature of the job. For electrical works, provide non-conductive tools and PPE.
• Working on live power cables /equipment is not allowed. ELCB shall be used in temporary panel boards; industrial connectors / sockets for temporary power cable connections.
• Safety lights will be used in case of power failure ensuring the good illumination of the working area to aid evacuation if necessary.
• Adequate lighting shall be provided to ensure the good illumination on the working area.
• Always maintain cleanliness in work areas. Housekeeping shall be of good standard and all cut pieces and debris shall be removed by the end of workday.
• Ensure that all lifting operations are carried out as per approved procedures and safety regulations.
• Ensure that adequate barricade and signage “DANGER KEEP-OUT, HEAVY LIFTING IN PROGRESS” is provided around the affected area. Work will be executed through Permit to Work system.
• All scaffolding shall be checked by competent person and should carry green tags “safe to use”, prior to use for working purpose.
• In case of fire, inform the nearest Supervisor/Foreman and other responsibility person of the site.
• Only small fire to be extinguished by using suitable fire extinguisher.
• If it is not possible to extinguish fire using fire extinguisher, leave the place do not panic and run.

• Moving to the assembly point inform nearby workers also to vacate the place.

• Once reaching the assembly point, wait for the head count & all clear information before vacating the area.