This method statement describes the procedure for the installation of fire protection services on a project.
The work methodology covers following activities:
- Pipe Hanger Installation
- Flanged Fittings Installation
- Valve with Screw Connection Installation
- Valve with Flanged End Connection Installation
- Flow Switch Installation
- Screw Fittings Installation
- Sprinkler Head (with ceiling) Installation
- Sprinkler Head (without ceiling) Installation
- Pipe Sleeve Installation
- Fire Protection Riser Pipe Installation
- Black Pipe Painting
- Black Pipe (with Undercoat) Painting
- Galvanized Pipe Painting
- Fire Pump Installation
- FE-13 System Installation
- Fire Seal installation
- Fireman Intercom System Installation
- Fire Alarm Conduits Installation
MATERIAL HANDLING AND STORAGE
Prepare delivery schedule and check site conditions as well as storage capacity.
Prior to delivery of Material to site, a site survey and make all necessary co-ordination with the main contractor as regards to access for the save transportation of the said material to the designated location.
Coordinate with site workers responsible for the system installation.
INCOMING STORAGE AT SITE
Check model and type of material against delivery order.
Check any damage during transportation.
If there is any evidence of damage, an internal inspection shall be made together with supplier’s representative and the Consultant.
A report shall be submitted to the Consultant on completion of such inspection.
Route identification and marking work shall not be started until coordinates with other Mechanical and Electrical Services.
Minor deviation from the approved construction drawing and M&E drawing would be determined on site with the consent of consultant site staff.
WORK METHODLOGY
PIPE HANGER INSTALLATION
Confirm Location: Identify the actual location of the hanger based on the approved shop drawing. Mark the position for installing the drop in anchor.
Install Drop in Anchor: Install drop in anchor. (Please refer to Method Statement for Drop in Anchor Installation).
Install Pipe: Install the pipe either by screw fitting or welding. .
Install Hanger Rod: Select the hanger based on the pipe size. Install the hanger rod to the drop in anchor.
Install Hanger: Install the hanger to the pipe and the hanger rod.
Tightening: Tighten the bolts and nut that hold the hanger rod and hanger evenly.
SCHEDULE OF PIPE HANGER SPACING AND ROD SIZE
|
Pipe Diameter (mm) |
Max Hanger Spacing (mm) | Rod Size (mm) |
|
12 |
3000 |
10 |
|
25 |
3000 |
10 |
|
32 |
3000 |
10 |
|
40 |
3000 | 10 |
| 50 | 3000 |
10 |
|
65 |
3000 | 10 |
| 80 | 3000 |
10 |
|
100 |
3000 | 10 |
| 150 | 3000 |
12 |
| 200 | 3000 |
12 |
FLANGE FITTING INSTALLATION
Select Flange: Check the flange size and specification according to pump size and valve size.
Fabricate Pipe: Cut the pipe to the required length.
Jointing: Jointing the flange to either valve or pump.
VALVE with SCREW CONNECTION INSTALLATION
Select Valve: Confirm the valve size and location based on the shop drawings. Ensure that the selected valve is screw type.
Fabricate Pipe: Cut the pipe to the required length and thread it accordingly.
Positioning: Place the valve between the pipes and make sure the threads are free of dust.
Jointing: Guide one of the pipe ends onto the valve’s thread, slowly run pipe in clock-wise direction
Tightening: Hold the valve firmly by a spanner on the flat nearest joint and then rotate the pipe with a plumbing wrench. Rotate the pipe until the end of the spindle operating joint. Repeat the above steps for the other pipe.
VALVE with FLANGE END CONNECTION INSTALLATION
Select Valve: Confirm the valve size and location based on the shop drawings. Ensure that the selected valve is flange type.
Positioning: Place the valve between the pipe flanges. Make sure the flange and adjacent pipe work are clean of dirt.
Select Gasket: Select the gasket size according to the valve size and associated pipe size based on approved shop drawings so that it can match the pipe work flange.
Connecting: Connect the valve with the pipe flange. The pipe flange shall be square with the associated pipeline.
Tightening: When the valve is in proper position, install the bolts into the holes. Tightening the nuts one by one evenly. Repeat the above steps for the other joint.
FLOW SWITCH INSTALLATION
Select Flow Switch: Confirm the valve size and location based on the shop drawings. Ensure that the selected valve is flange type.
Confirm Location: Place the valve between the pipe flanges. Make sure the flange and adjacent pipe work are clean of dirt.
Drill Hole: Select the gasket size according to the valve size and associated pipe size based on approved shop drawings so that it can match the pipe work flange.
Cleaning: Clean the inside pipe of all growth or other materials for a distance equal to the pipe diameter on either side of the hole.
Invert Vane: Roll the vane so that it may be inserted into the hole, do not bend or crease it. Insert the vanes so that the arrow on the saddle points in the direction of water flow.
Tightening: Install the saddle points and tightening the nuts alternatively. The vane must not rub the inside of the pipe or bind in any way.
SCREW FITTING INSTALLATION
Check Pipe Length: Check the pipe length required based on the approved shop drawing.
Marking & Cutting: Mark the desired length on the pipe and cut it by using a hacksaw. Make sure the pipe is perpendicular to the hacksaw cut.
Threading: Place the pipe in the threading machine and thread it accordingly. Make sure the thread of the pipe is in good condition.
Wrap Teflon Tape: Remove the oil from the pipe end after the threading procedure and wrap it with Teflon tape.
Installation: Install the pipe to the screw fitting.
SPRINKLER HEAD with CEILING INSTALLATION
Select Sprinkler Head & Confirm Location: Select the sprinkler head according to the approved materials list and ensure that the sprinkler head positions are based on the approved shop drawing.
Check Ceiling Tee Installation: Ensure the ceiling tee is being installed and leveled.
Install Dropper: Install the dropper pipe to the sprinkler range pipe.
Cleaning: Clean the screw fitting and sprinkler tee joint to ensure they are free of dust.
Wrapping: Wrap the screw joint of the sprinkler head Teflon tape to prevent leaking.
Tightening: Install the sprinkler head rosette and sprinkler head to screw joint of the dropper pipe. Then, tighten the sprinkler head into the screw fitting by using wrench.
Levelling: Ensure the sprinkler head is level against the ceiling board.
SPRINKLER HEAD without CEILING INSTALLATION
Select Sprinkler Head & Confirm Location: Select the sprinkler head according to the approved materials list and ensure that the sprinkler head position are based on the approved shop drawing.
Cleaning: Clean the screw fitting and sprinkler tee joint to ensure they are free of dust.
Wrapping: Wrapping the screw joint of the sprinkler head Teflon tape to prevent leaking.
Tightening: Then tightening the sprinkler head into the screw fitting by using wrench.
PIPE SLEEVE INSTALLATION
Confirm Location: Check the approved shop drawings for the actual location of the pipe sleeve to be provided.
Marking: Mark the location of the pipe and identify the size of pipe sleeve to be provided. (Note : The pipe sleeve should be 1 pipe size bigger than the actual pipe running)
Submit for Approval: Then, the location and size of pipe sleeve to be provided shall be submit to Consultant approval.
Install: Upon approval, the pipe sleeve shall be provided before the concreting.
FIRE PROTECTION RISER PIPE INSTALLATION
Below section of method statement defines the methods and sequence to be carried out for the installation of Fire Protection Riser Pipe to ensure they are in compliance with contract requirements, technical specifications and quality management. This shall cover all the Fire Protection System, i.e. Sprinkler System, wet Riser and Hose Reel System.
Check Location of Riser
Confirm the location of riser based on approved / coordinated shop drawings.
Check whether any opening through slabs (either box-up or pipe sleeves) is provided.
Check the size of the opening. If the opening size is not sufficient or opening is not provided, request permission for coring from the Main Contractor.
Core opening once approval is obtained.
Fabricate pipes as per the shop drawings.
Hoisting of Pipe: Book the Materials Hoist or Tower Crane fro hoisting the pipes to the designated floors, position the pipes at the area allocated by the main contractor.
Install Riser Pipe
Confirm the location of riser based on approved / coordinated shop drawings.
Lower down the pipe off any unwanted materials and rubbish from the riser shaft.
If box opening is provided, slip a piece of pipe sleeve onto the pipe.
Coupled the pipe with previously installed pipe with a flexible coupling. (Please refer to Method Statement for the installation method of flexible coupling).
Pull upwards the newly installed pipe using the chain block. This is to allow pipe movement during the building shrinkage.
Align the pipe vertically with spirit level.
Install Riser Pipe Bracket
Once the pipe has been aligned, install the pipe bracket to support the riser pipe.
If box opening is provided, install temporary bracket to the pipe.
Cast the opening and ensure the pipe sleeves are installed prior to casting.
Once the concrete has cured, dismantled the temporary bracket and replace it with a permanent bracket.
Install Fire Barrier: Install Rock Wool into the gap between the riser pipe and the pipe sleeve as per contract requirement. The Rock Wool will act as fire barrier in the case of fire.
BLACK PIPE PAINTING
Clean the Black Pipe: Clean the black pipe with cotton rag to remove any dust or grease on the pipes.
Paint the Pipe with Red Oxide: After cleaning, paint the black pipes with 1 layer undercoat of Red Oxide Primer. Please ensure both sides (top & bottom) are painted evenly.
Wait to Dry: Put the painted pipes in a good ventilation condition for 24 hours for the pant dry.
Paint with Finish Coat: After the paint is dried, then paint the pipes with 1 layer of finish coat. Please ensure both sides (top & bottom) are painted evenly.
Install the Pipe: After the finish coat dry, install the pipes.
Paint Final Layer: After installation, paint the final layer of paint to the installed pipes. Please ensure both sides (top & bottom) are painted evenly.
BLACK PIPE with UNDERCOAT PAINTING
Clean the Undercoat Black Pipe: Clean the undercoat black pipes with cotton rag to remove any dust on the pipes.
Paint with Finish Coat: After cleaning, paint the black pipes with 1 layer finish coat on both sides of pipes.
Install the Pipe: After the finish coat dry, install the pipes.
Paint Final Layer: After installation, paint the final layer of paint to installed pipes.
GALVANIZED PIPE PAINTING
Clean the Galvanized Pipe: Clean the galvanized pipe with cotton rag to remove any dust or grease on the pipes.
Paint the Pipes with Zinc Chromite: After cleaning, paint the galvanized pipes with 1 layer undercoat of Zinc Chromite Primer. Please ensure both sides (top & bottom) are painted evenly.
Wait for Dry: Put the painted pipes in a good ventilation condition for 24 hours for the paint dry.
Paint with Finish Coat: After the paint dried, then paint the pipes with 1 layer of finish coat. Please ensure both sides (top & bottom) are painted evenly.
Install the Pipes: After the finish coat dry, install the pipes.
Paint Final Layer: After installation, paint the final layer of paint to the installed pipes. Please ensure both sides are painted evenly.
FIRE PUMP INSTALLATION
Pump Plinth: Ensure pump plinth provided according to the specification and clearly status in the drawing.
Inspect Inertia Block: Inspect inertia block delivered and ensure it is according to the specifications.
Inspect Spring Isolator: Inspect spring isolator deliver. Ensure it is according to the specification.
Fire Pump Inspection: Ensure all the fire pumps delivered are according to the specifications. Each pump delivered to site will be provided with a copy of approved test certificate.
Install the fire pump according to the procedure below:
- Provide the pump plinth
- Install the Spring Isolator according to the mounting with the inertia block.
- Mount the inertia block on top of the spring isolator.
- After that mount the fire pump base on top of the inertia block.
- Check all seal, glands and pipeline for leaks.
- Check all pump bearings and lubricate with oil or grease as necessary.
- Check the alignment and condition of all rubber coupling between pumps and drive motors.
- Check all bolts and nuts for tightness and tighten as necessary.
FE 13 (FIRE SUPPRESSION SYSTEM) INSTALLATION
Material Inspection: Inspect all the materials delivered for installation of the FE 13 system to make sure these are in accordance with the project specifications and approved material submittals.
Inspect Piping Installation: Ensure all the piping installed for the FE 13 system are following the drawing. Ensure that pipe brackets/hanger are installed at every 3 meter distance.
Inspect Wiring Installation: Inspect all the surface conduiting and wiring installed for the FE 13 fire suppression system in protected rooms are according to the specifications and approve drawings.
FE 13 Cylinder Installation: Install the FE 13 cylinder according to the details for FE 13 system installation in the approve drawing. Ensure each of the cylinder are fully charged.
FE 13 Panel Installation: Ensure the FE 13 panel and key switch are installed according to the FE 13 system layout in that room. Test the key switch. Repeat the test for 5 times.
Testing & Commissioning: After completing all the installations, clean out the internal surface of pipework by purging air. Ensure that the system is working by doing the internal testing.
FIRE SEAL INSTALLATION
Install Pipe Sleeve: Install pipe sleeve with radius 25mm bigger than fire protection pipe.
Inspect Pipe & Sleeve: Ensure pipe sleeve or galvanized sheet are installed with a proper gap spacing.
Insert Rockwool: Insert Rockwool to the center area in between sleeve and pipe and create a tight bond.
Apply Sealant: Apply fire sealant to the front gap of pipe sleeve. Ensure minimum sealant penetration depth should not less than 12mm.
Touch-Up: Ensure the fire sealant have filled in all the visible gaps and make a smooth surface finishes.
Identifications and Indicators: Apply sticker to the pipe sleeve to indicate location, type of services and personal involved in the above works.
FIREMAN INTERCOM SYSTEMS INSTALLATION
The contractor shall supply and install in accordance with the specification of material and workmanship, the fireman intercom systems, underground and aboveground pipe work and electrical work.
Wiring installation work procedure is as the following;
- The preparation of wiring installation working drawing, technical data catalog are to be in conducted simultaneously after the finalization and approval of design drawing.
- After the approval working drawing and technical data catalogs, the contractor shall proceeds with the procurement of all related equipment and materials for wiring installation work.
- Installation of the remote station box: Remote Station box should be installed at 1800mm height from the finished floor level at escape staircases, lift motor room, gen-set room of fire safe
Microprocessor based Fireman Intercom System
The fireman intercom system is designed to be used by fireman for two-way communication during fire situation or emergency.
The system consist of different sections i.e.
1. Main Fireman Intercom Panel (MFIP).
To be situated at the Fire Control Room.
This is command center where all calling and receiving of Remote Fireman Intercom Stations (RFIS) are monitored and controlled.
All the data (calling and receiving signals) are processed into audio and visual.
The MFIP consists of the following;
-
- LED indicators
- An audible warning device (buzzer)
- A DC Voltmeter
- LCD (Liquid Crystal Display) for text display
- An operator keyboard for command entry
- Master Handset
- Intercom Status Panel indicating the RFIS’s zone
2. Remote Fireman Intercom Stations (RFIS)
To be situated at fire escape routes, such as escape staircase and fire safe lobbies.
It consists of red color handset complete with a dynamic receiver and condenser microphone transmitter.
The handset is housed red metal cabinet with glass front panel, a break glass and key operated door.
Calling and fault condition of all RFIS are monitored at the MFIP.
3. Remote Telephone Terminal Unit (RTTU)
To be situated at any of the suitable area, i.e. telephone or electrical
It consist of red color box complete with zone card termination
One RTTU can be linked to a maximum of 10 RFIS per set.
All the RFIS are to be terminated to the RTTU by 1 pair of PVC cable 1.5mm-sqr each.
Wiring from the RTTU (Remote Telephone Terminal Unit) to the Main Fireman Intercom Panel are:
-
- 1 pair twisted and screened (5.4mm2) for data
- 1 pair RVC cable (2.5mm2) for speech
- 1 pair PVC cable (2.5mm2) for power
TESTING & COMMISSIONING PROCEDURES
Minimum of two people are required for the testing. One stationed at the Fireman Intercom Panel and the other at any chosen Remote Fireman Intercom Station to actuate calls.
Check all indicating light on the Main Fireman Intercom panel console are in good condition.
Calling from the master handset to remote intercom station;
- Pick-up the master handset, key-in the remote station’s zone number at the
- Led at the remote handset box will light up Check the correct remote station at the zone.
- Open the remote handset box, pick-up the handset. Two-way communication should establish.
Calling from any remote intercom station to the Main Fireman Intercom panel;
- Open the remote handset station box and pick up the handset, call led at the MFIP should blinked and buzzer ring continuously.
- Check the correct zone’s calling at the Main Fireman Intercom Panel.
- To establish the call. Pick up the master handset.
Conference call or party lines can be generated from master handset or remote stations – Maximum of 9 remote fireman intercom + 1 master handset can communicate simultaneously.
- Refer to ‘CALL’ procedure
- During Conferencing, the master panel can terminate any calls of the remote station by pressing the ‘CUT’ key.
- The master panel can also establish new outgoing or incoming calls by following the ‘CALL procedures’ and the first received call will be cut-off.
Reset the system and return it to normal position.
FIRE CONDUIT INSTALLATION
MEASUREMENT / LOCATION OF G.I. CONDUIT AND MARKING OF CONDUIT
- Site supervisor will study and counter check the proposed locations of the conduit as shown on the shop drawing. Ensure proper coordination with the Main Contractor and other trades to optimize the space allocation and proper conduits management.
- Site supervisor will measure the length of G.I. conduit required for installation at site and instruct the workers to prepare these conduits. Installation will be carried out in a planned and timely fashion so as not to delay works by other trades.
- For horizontal installation of conduits, straight lines are marked by using string coated with white powder, tied to the nails at both ends.
- Ensure appropriate string tension by plucking and releasing the string before drawing the straight line.
- Repeat the steps above for vertical surface installation.
FIXING OF SURFACE G.I. CONDUIT
After dismantling the strings and the nails, drill holes along the white lines.
Insert the drop-in anchor bolt into the holes before installing the rods.
Clip the G.I. conduits to the rods by using fasteners.
If necessary, the G.I. conduit will be cut to length required and threaded.
Threading will be process by stocks and dies.
Rotate the stocks and dies two and a half turns in a clockwise direction and the in a counter clockwise direction, to clear away the accumulated swart.
This will enable the tread to be cut cleanly and efficiently without fear of stripping. Once completed, file across the leading edge of the thread and reamer the inner periphery.
This prevents cable snagging on burred edges.
Conduit sockets complete with thread joint two length of conduits. In case of crossing or ending or at ‘T’ junction area, cross-boxes, “Tee” boxes, “Trough” boxed are normally used to link up conduit pipes.
As soon as the conduits are fixed, site supervisor will check and inspect the site to ensure that installations are according to the shop drawings.
A formal inspection request will be issued to the consultant.
STANDARD AND CERTIFICATION
Ensure that the capacities of trunking and conduits provided are adequate to cater all wirings with a minimum spare space of 40%.
METHOD OF FIXING OF CONCEALED G.I CONDUITS
Place the conduits between the two layers of slab rebar or behind the column rebars from dropper to socket outlet points.
Ensure that conduits, inspection boxes, back boxes and all other accessories used are rigidly secured to the rebar and all joints are firmly tightened before concreting.
Site supervisor must ensure that preventive measures are taken to keep concrete and unwanted materials from getting into the conduit by temporarily sealing off the open-ended conduits with tape.