Method Statement Mechanical

AAL REYAMI ELECTROMECHANICAL

2009

METHOD OF STATEMENTMECHANICAL

WORKS

D U B A I

CONTENTS

M - 01 Method of Statement Under ground drainage

M - 02 Method of Statement Installation of high level drainage

M - 03 Method of Statement Installation of water supply line at High level

M - 04 Method of Statement Installation of water supply line at High level

M – 05 Method of Statement Installation of Ducting

M - 06 Method of Statement Installation of copper piping for FAHU

M – 07 Method of Statement Installation of copper piping for Decorative unit M - 08 Method of Statement Installation of Booster pump

M - 09 Method of Statement Installation of Transfer pump

M - 10 Method of Statement Installation of Submersible pump

M - 11 Method of Statement Installation of Fire pump

A L R E Y A M I E L E C T R O M E C H A N I C A L Page 2

METHOD STATEMENT – M 01

UNDER GROUND DRAINAGE PIPE WORK

1.0 PurposeTo define the method of installation of underground pipe work.

2.0 ScopeThis method is applicable for drainage pipe work below ground.

3.0 Method

3.1 Preparation Work

3.1.1 Check the trench route to be made to ensure that the pipes to be installed are as indicated on approved construction drawings.

3.1.2 Check the materials to be used are as per the approved make.

3.1.3 Levelling of ground before excavation to be done by the main contractor.

3.1.4 Excavate the trench as per the route marked on approved drawing. The trench bed must be compacted smooth and must be free from foreign particles

3.1.5 Check whether the inside portion of pipe is properly cleaned before installation / fit up.

3.1.6 Place concrete blocks at standard distance to support the pipes.

3.1.7 Lay the pipes as per the invert levels & slope mentioned in

the approved layout with proper supports, using the water level & measuring tape with respect to the benchmark level.

3.1.8 Inspection of pipe work and levels to be checked.

3.1.9 Tangent Glue is applied on the pipe after cleaning it and abrading the surface to roughness using sand paper and left for few minutes to dry it.

3.1.10 Inspect the pipe work for leakage by gravity leakage test. (by Consultant)


3.1.11 Make bedding up to the bottom level of the pipe with aggregate and compact properly.

3.1.12 Cover the pipe (up to top level) with aggregate as per the standards.

4.0 Reference documents

4.1 Approved shop drawings.

5.0 Inspection and Measuring Equipment Used

5.1 Spirit level.5.2 Water level.5.3 Measuring tape

6.0 Safety

6.1.1 Safety equipment (example Hard hats, Safety shoes, Coverall gloves, Goggles when necessary etc) to be worn all the times.


METHOD STATEMENT –M 02

INSTALLATION OF PIPE WORK AT HIGH LEVEL ( DRAINAGE )

1.0 PurposeThis method of statement is to define the installation of Pipe work at high level.

2.0 ScopeThis method of statement is applicable for installation of Pipe works at high level for drainage pipe works.

3.0 Installation Procedure

3.1.1 Installation of pipes

3.1.2 Mark out the location of hanger thread rods for pipe installation as per the approved construction drawing.

3.1.3 Drill the marked position for hangers and supports by using the drill bit of appropriate size.

3.1.4 Fix the unfix anchor at drilled position by gentle and uniformly hammering.

3.1.5 Fix the threaded rod of 6mm diameter appropriate size & length in the anchor by twisting by turning.

3.1.6 After fixing the threaded rod, insert a 6mm diameter washer of appropriate size in to the rod.

3.1.7 Finally fix the washer near to the slab by tightening a nut over it, this will improve the strength and load bearing capacity of threaded rod.

3.1.8 After cutting the pipes in the required length, both ends should be chamfered properly to remove the unevenness and surface is made rough using sand paper for length of 3 cm (approx) for good adhesive surface preperations.

3.1.9 Install the pipe in position as per the approved layout and make the end connection of pipes as standard specification for each service.

3.1.10 After completion of pipe end connection, fix / tight the support clamps properly to make the pipe straight and level as per the layout.

3.1.11 Check the levels of pipe work with spirit levels and measuring tape.


3.1.12 Pressure test and final inspection of the pipe work (by Consultant) as per the testing philosophy ref.

4.0 Reference Documents

4.1 Shop Drawings


5.1 Pressure gauge 5.2 Level gauge / Spirit level. 5.3 Measuring tape

6.0 Equipment Required

6.1 Electric Drill Machine 6.2 Grinder 6.3 Electric Cutting Machine

6.4 Pressure test pump.

7.0 Safety

Safety equipment (example Hard hats, Safety shoes, Coverall Gloves, Goggles when necessary etc) to be worn all the times.



INSTALLATION OF PIPE WORK AT HIGH LEVEL ( WATER SUPPLY)


4.0 ScopeThis method of statement is applicable for installation of Pipe works at high level for water supply pipe works.


3.1.1 Installation of pipes







3.1.19 After cutting the pipes in the required length, both ends should be chamfered properly to remove the unevenness and surface is made rough using sand paper for length of 3 cm (approx) for good adhesive surface preparations.

3.1.20 Install the pipe in position as per the approved layout and make the end connection of pipes as standard specification for each service.




3.1.23 Flow and Leakage test and final inspection of the pipe work (by Consultant) as per the testing philosophy ref.


4.1 Shop Drawings




6.1 Electric Drill Machine 6.2 Grinder 6.3 Electric Cutting Machine

6.4 Pressure test pump.

8.0 Safety




INSTALLATION OF PIPE WORK AT HIGH LEVEL ( FIRE FIGHTING)


6.0 ScopeThis method of statement is applicable for installation of Pipe works at high level for fire fighting pipe works.


3.1 Installation of pipes







3.1.8 After cutting the pipes to the required length, if the diameter of the pipe is less than 2.5 inch both ends should be threaded by using a threading machine and for pipe diameter above 2.5 inch the pipes are groove cut to the required depth as per the installation specification.

3.1.9 The pipes are connected to each other using a grooved coupler as per the standard pipe installation procedure.




3.1.12 Flow and Leakage test and final inspection of the pipe work (by Consultant) as per the testing philosophy ref.


4.1 Shop Drawings




6.1 Electric Drill Machine 6.2 Threading Machine 6.3 Electric Cutting Machine

6.4 Pressure test pump. 6.5 Grooving Machine

9.0 Safety



METHOD STATEMENT M - 05

INSTALLATION OF DUCTING

1.0 PurposeTo define the method of installation of Ducting.

2.0 ScopeThis method is applicable for Ducting.


3.1 Installation procedure 3.1.1 Fabrication of ductwork will be as per DW142/ASHRAE Standard , using pre-insulated material of applied make.

3.1.2 Mark out the location of hanger thread rods for duct installation as per the approved construction drawing.


3.1.4 Fix the unfix anchor at drilled position by gentle and uniform hammering.

3.1.5 Fix the threaded rod of 6mm diameter & length in the anchor by twisting.

3.1.6 After fixing the threaded rod of 6mm diameter, insert a washer of appropriate size in to the rod.


3.1.8 Fix all the duct pieces from the mouth of the unit

3.1.9 Joint all the ducts using flanges or cleats and corners.

3.1.10 Install the VCD’s as per the approved drawings.

3.1.11 Insulate the ducts using Fibre Glass wool if it is a GI duct.

3.1.12 Dip the canvas cloths in Foster and fostering all the ducts in case of GI duct



4.1 Measuring tape, Sheet cutter, and adjuster.

5.0 Safety

5.1.1 Safety equipment (example Hard hats, Safety shoes, Coverall gloves, Goggles when necessary etc) to be worn all the times.



INSTALLATION OF COPPER PIPPING FOR FAHU

1.0 PurposeTo define the method of installation of Copper piping

2.0 ScopeThis method is applicable for installation of Copper piping and DX-AHU.

3.0 Method

3.1 Check the plinth for AHU is of required size.

3.2 Mark out the exact location of AHU Units on plinth.

3.3 Fix the Vibration isolators (RIBBED RUBBER PADS) for AHU on Plinth.

3.4 Place the AHU on the Vibration isolator.

3.5 Hang the condenser unit with proper supports

3.6 Install the Copper pipes from AHU to Condenser Units as per the approved layout using flare nuts as brazing as per the unit specification and manufacturers recommendation.

3.7 Expansion valve, sight glass Dryer and filter are installed on liquid line

3.8 Control valve and sight glass are installed on suction line.

3.8 Braze the joints as per the standard specification

3.9 Pressure testing and flushing to be carried out prior to vacuum suction.

3.10 Vacuuming to be carried out using vacuum pump.

3.11 R-22 gas to be charged referring to charging chart as per the manufacturer’s recommendation.

3.12 Insulation is wrapped around the copper piping and further wrapped with 6oz cloth and Childers.



4.1 Approved Drawings.


4.2 Pressure Gauge, Brazing set, pipe cutter and pipe bender.

6.0 Safety

6.1 Safety equipment (example Hard hats, Safety shoes, Coverall, gloves, Goggles when necessary etc) to be worn all the times.



INSTALLATION OF COPPER PIPPING FOR DECORATIVE UNIT

1.0 PurposeTo define the method of installation of Copper piping

2.0 ScopeThis method is applicable for installation of Copper piping for decorative wall mounted unit.

3.0 Method

3.1 Check the plinth for the outdoor unit is of required size.

3.2 Mark out the exact location of outdoor Units on plinth.

3.3 Fix the Vibration isolators (RIBBED RUBBER PADS) for outdoor on Plinth..

3.4 Place the outdoor unit on the Vibration isolator.

3.5 Hang the indoor unit with proper supports

3.6 Install the Copper pipes from the Condenser Units as per the approved layout using flare nuts and brazing as per the unit specification and manufacturers recommendation.

3.7 Braze the joints as per the standard specification

3.8 Pressure testing and flushing to be carried out prior to vacuum suction.

3.9 Vacuuming to be carried out using vacuum pump.

3.10 R-22 gas to be charged referring to charging chart as per the Manufacturers recomendation

3.13 Insulation is wrapped around the copper piping and further wrapped with 6oz cloth and Childers.





4.3 Pressure Gauge, Brazing set, pipe cutter and pipe bender.

6.0 Safety

6.1 Safety equipment (example Hard hats, Safety shoes, Coverall, gloves, Goggles when necessary etc) to be worn all the times.



INSTALLATION OF BOOSTER PUMP

1.0 PurposeTo define the method of installation of Booster pump

2.0 ScopeThis method is applicable for installation of Booster pump.

3.0 Method

3.1 Check the plinth for the Booster pump is of required size.

3.2 Booster pump installation works shall be carried out in accordance

with the specification.

3.3 Fixing position shall be marked out on the concrete base.

3.4 Rubber pad shall be laid before fixing the pump.

3.5 Pump installation shall be completed according to the manufactures

recommendation.

3.6. The size of the suction pipe shall be as per manufactures

.recommendation

3.7 Discharge side shall be connected to the water supply network of the

building through pressure gauge and isolating valve

3.8 The suction & discharge side of the Pump shall be connected to flexible

connector

3.9 Anti-vibration pad shall be fixed to the pump


4.1 Approved Drawings. 4.2 Approved Material Submittal.


4.4 Pressure Gauge, Measuring tape, Spirit level.


6.0 Safety

6.1Safety equipment (example Hard hats, Safety shoes, Coverall, Gloves, Goggles when necessary etc) to be worn all the times.



INSTALLATION OF TRANSFER PUMP

1.0 PurposeTo define the method of installation of Transfer pump

2.0 ScopeThis method is applicable for installation of transfer pump.

3.0 Method

3.1 Check the plinth for the transfer pump is of required size.

3.2 Transfer pump installation works shall be carried out in accordance

with the specification.

3.3 Fixing position shall be marked out on the concrete base.

3.4 Rubber pad shall be laid before fixing the pump.


recommendation.

3.6 The suction side of the pump shall be connected to foot valve and

. Isolating valve with suction pipe. The size of the suction pipe shall be as

per manufactures recommendation.

3.7 Discharge side shall be connected to the water supply network of the

building through pressure gauge and isolating valve

3.8 The suction & discharge side of the Pump shall be connected to flexible

connector

3.9 Anti-vibration pad shall be fixed to the pump






6.0 Safety




INSTALLATION OF SUBMERSIBLE PUMP

1.0 PurposeTo define the method of installation of submersible pump

2.0 ScopeThis method is applicable for installation of submersible pump.

3.0 Method

3.1 Check the support for the submersible pump is of proper size.

3.2 Submersible pump installation works shall be carried out in

accordance with the specification.

3.3 Fixing position shall be marked out on the manhole wall.


recommendation.

3.5 The suction side of the pump shall be connected with alarm switch,

Float valve and isolating valve. The pipe size to be as per the pump

Manufacturer’s recommendation.

3.6 Discharge side shall be connected through the pressure chamber

To the adjacent manhole





6.0 Safety





INSTALLATION OF FIRE HOSE REEL PUMP

1.0 PurposeTo define the method of installation and operation of fire hose reel pump.

2.0 ScopeThis method is applicable for installation and operation of fire hose reel pump.

3.0 Method

3.1 Check the foundation is ready as indicated on approvedConstruction drawing.

3.2 Check the level of suction pipe line is to be below the level of pump(suction header)

3.3 Check whether the required piping and valves are installed properly

3.4 Make sure that electrical panel for the pump is given correct power supply with protection.

3.5 Load the pump on a strong foundation. Use the expansion bolts to the base frame to the concrete foundation. The surface of the foundation should be smooth and level. Ensure easy access to the unit from all sides for maintenance and services.

3.6 Pump set is accurately aligned in the factory before dispatch. However it is essential to recheck the alignment at site after fixing pump set on the site.

3.7 The pump set should be located near to the suction reservoir.

3.8 Fix the gate valves non return valves vibration protected flexible connector etc and suction discharge manifolds as shown on the dawning.

3.9 Connect the suction and discharge line to the manifold .check whether all joints are straight.

3.10 Fix the pressure switch and pressure gauge on the discharge header.

3.11 Fill the water in the pump and suction line through the priming valve and remove all the air blocks.

3.12 Interconnecting wiring between the panel and motor diesel engine pressure switches float switches for dry run protection etc should be done.


Panel, motors pressure switches and float switches must be grounded with suitable wires.

3.13 Do the wiring from electrical supply source to the pump control panel.

3.14 Do the necessary piping between the fuel tank and diesel tank.

3.15 After installation has been completed an operational test has to be conducted to ensure the proper operation of the pump set.

3.16 Keep starting point of electrical pump slightly higher than the starting point of diesel pump. Keep starting point of jockey pump is slightly higher than starting point of electrical pump.




5.1 Pressure Gauge.5.2 Spirit level.5.3 Mulitimeter

6.0 Safety

6.1 Safety equipment (example Hard hats, Safety shoes, Coverall gloves, Goggles when necessary etc) to be worn all the times.
