Method Statement Title: Installation of Domestic Water Pumps (Transfer and Booster Pumps)
- Scope
- This method statement applies to installation of Domestic Water Pumps as per Specification Section 15700/2.01 and manufacturers instructions.
Note
A separate method statement Ref.ETA/MS/P-13 will be submitted for Start-up and Commissioning of Domestic Water Pumps.
- Purpose
- Purpose of this method statement is to outline the method of storage, handling and installation of Domestic Water Pumps, valve package and controls.
- Material
- Transfer pump set.
- Booster pump set.
- Gate valves NRV, pressure gauge on discharge manifold and piping accessories as per approved submittals.
- Float switches for level control.
- Pressure transducer and pressure switch for booster pumps and pressure switch for transfer pumps.
- Pump foundation as per approved drawings.
- Control Panel including protection starters and controller.
- Pressure vessel.
- Applicable Location
- Transfer pump set – Tower W2 Basement level & Tower E2 Basement level.
- Booster pump set – All towers roof level.
- Method
- Receiving
- When received at site, each pump, valves, control panels, flat switches shall be checked for quantities, Model Nos., physical damages etc. and notify supplier of any discrepancies for suitable rectification or replacement.
- Valves shall be segregated as per sizes/models and stored on racks within a covered store.
- Any items found damaged or not found suitable as per the project requirements shall be quarantined. Non-complaint material shall be clearly marked and stored separately to prevent any inadvertent use until returned to vendor.
- Storage
- Pump shall be stored on a flat surface in well ventilated storage area.
- Inlet and outlet flange blanks shall not be removed until ready for connection to pipe work.
- Manufacturer’s instructions shall be strictly followed as applicable.
- If the pumps are stored for longer periods the shaft shall be periodically rotated and lubricated, if required.
- Storekeeper will be responsible for proper storage and maintenance of records, as required.
- Preparation
- The foundations designed to meet the vibration and sound control requirements shall be provided by Civil Contractor (NMX).
- Check and ensure that the shop drawings used are latest and approved for construction.
- ETA will co-ordinate the location of foundation as per approved shop drawings.
- The foundation surface shall be flat and level and smoothly finished top surface.
- Check the piping support locations and cable tray routing locations in co-ordination with pump and piping layout and ensure they are not obstruction the space around pump.
- Ensure easy access and sufficient clearance for servicing and maintenance i.e. for replacement of pump, motor, pressure vessel.
- Installation Pump Set
- Mark the locations of the pump base frame and hole locations.
- Drill the suitable size holes in the foundations.
- The pump and the other associated accessories including the piping manifold are pre-assembled on a base frame. Shift the pumps to the place of installation in safe manner. Use hand trolley / folk-lift / crane as applicable / required as per site conditions.
- Check and ensure free rotation of the shaft.
- Position the pump frame assembly on the foundation and fix the anchor fasteners.
- Water level the pump assembly by placing the shim plates below the base frame as required.
- Position the pressure vessel and do the interconnecting pipe work as per approved drawings for the booster pump.
- Ensure proper coupling guards are provided.
- Complete the piping and valve package installation as per approved drawings. Remove the end caps fixed on the inlet flange.
- Install the electrical control panel and power connections as per approved drawings.
- Provide grounding wiring as per approved drawings/manufacturers instruction.
- Follow the manufacturers instructions while installing the pump.
- After completion of the installation, the same shall be checked and certified by the supplier/manufacturer.
- Inspection
- After completion and pump installation and piping connections, the same shall be checked and certified by the pump supplier.
- Request for Inspection shall be raised for Consultants inspection.
- Safety
- All safety precautions shall be followed as per established project safety plan and procedure.
- Only experienced and skilled technicians shall be engaged for carrying out pump installation work.
- The people involved in the installation shall use PPE such as safety helmets, safety shoes, harness, gloves, coverall, goggle, etc., as required.
- Safety officer shall check and ensure that all safety precautions are followed.
- Safety officer shall check and ensure that all scaffolding and ladders use at site are having duly signed tags.
- References
- Manufacturers instructions.
- Approved domestic water pump submittal.
- Approved shop drawings.
- Records
- Request for Inspection duly signed by the Consultant.
- Pump installation checklist.
- Installation certificate from Manufacturer / Local Representative.
- Attachment
10.1. Installation check list reference
