BIỆN PHÁP LẮP ĐẶT THÁP GIẢI NHIỆT

MOS, Biện pháp thi công Tháp giải nhiệt, Method of Statement of Cooling Tower Installation, Tháp lắp Tháp giải nhiệt, Cách lắp Tháp giải nhiệt trong các toàn nhà cao tầng sử dụng hệ thống Chiller có Tháp giải nhiệt nước

-METHOD STATEMENT FOR COOLING TOWER ASSEMBLY AND

INSTALLATION

Submission Ref :PSC-HK-MS-M-0010

-Table of Contents 1 INTRODUCTION .3

1.1 Purpose .3

1.2 Scope .3

1.3 Exclusions .3

2 GENERAL 3

2.1 Program 3

2.2 Location - Address 3

2.3 Approvals 3

2.4 Labor resources 4

2.5 Communications .4

2.6 Site Resources Required 4

2.7 Temporary material 4

2.8 Protection 4

2.9 Equipment/Tools 5

2.10 Hot works 6

2.11 Confined space works 6

2.12 Emergency & Safety Equipment 6

2.13 Materials required for installation 8

2.14 Schedule of drawings 8

2.15 Schedule of inspection 8

2.16 Attendees 8

2.17 Safety Briefing 8

2.18 Mitigation of Risk 9

3 Actual Works Method Statement 9

3.1 Delivery and Store 9

3.2 Cooling tower assembly & installation methodology 10

3.3 Setting to work 22

3.4 Testing 22

3.5 T&C Register 23

3.6 Reports 23

4 Appendix 24

4.1 Certificate of calibration .24

4.2 Instrument catalogue and manual book 25

2.1.1 Ensure that the shop drawing used for the references at site is approved for construction.

2.1.2 Ensure that designated manpower to conduct works at site must be properly trained and well oriented by thesafety engineer

2.1.3 All equipments, tools and mobile scaffolding to be used must be inspected and approved by authorized safetyengineer at site

2.1.4 All staffs associated with the works shall be sufficiently experienced

2.1.5 When the workers climb up the working platform, ladder, his hands must be free

2.1.6 All materials to be used at site must be properly secured and clean

2.1.7 Working period to base on civil work and Cooling tower installation schedule which will be attached aftergetting approval (Waiting for approval)

2.2 LOCATION – ADDRESS

Application for 21st floor

The Cooling tower team will coordinate and carry out as below organization chart

2.5 Communications

Office mobile phone or walkie-talkie will be used during working time

2.6 SITE RESOURCES REQUIRED

Temporary fire protection equipment

Site electric panel should be needed as site condition

-Ensure the availability of equipment and tools provision for Cooling tower assembly and installation works as

follows:

1 Tape measure

3 Silver ink marker pen 4 Level measure

11 Hydraulic toe jack 12 Caution Tape

13 Pipe tube 14 Space roller (Doubletype)

-4) Hand gloves

2.13 MATERIALS REQUIRED FOR INSTALLATION

3 Anchor bolt 4 Frame for Coolingtower

2.14 SCHEDULE OF DRAWINGS

-Refer to shop drawing layout of floors as below

CLMK_MECH_PC_2101

2.15 SCHEDULE OF INSPECTION/T&C FORM

Refer to ITP form as the attached file in below

2.16 ATTENDEES

2.16.1 Sub-contractor manager

2.16.2 Sub-contractor site manager

2.16.3 Main contractor MEP coordinator

2.16.4 Main contractor mechanical engineer

2.16.5 HKL M&E manager

2.17 SAFETY BRIEFING

2.17.1 Safety shall be in first priority during construction, safety staff shall be present on site all the time tosupervise and to remind workers to observe safety requirement Stop work order shall enforce once its dose not meetthe safety requirements

2.17.2 Safety shall conform strictly observed All workers and staff on site shall be oriented of safety requirements.All safety equipment such as cloths , shoes, helmet , gloves , safety belt should provide and regularly checked duringconstruction

2.17.3 The engineer shall inspect all subcontractor tools prior to be used on site

2.17.4 Safety Supervisor shall be present for all the safety site inspection

2.17.5 For the safety of worker, grounding wire for the electric ARC process must be provided and wet cloths,protective glasses, long sleeve cloth must be imposed to worker

2.17.6 Fire extinguisher shall be provided at welding area and safety provision must done to ensure usageworkability

2.17.7 Safety working with Scaffolding

2.17.7-1 All scaffolds must be erected under the supervision of a competent and experienced person- usually theconstruction superintendent This includes moving scaffolds from one position to another Each leg of a scaffoldmust be supported by and adequate footing Loose bards, bricks and other material do not provide a safe, adequatebase

2.17.7-2 Where the working platform in more than 10 feet off the ground, the scaffold shall have guardrailsinstalled

2.17.7-3 If people are working under the scaffold, toe boards must be used to prevent tools and materials fromfalling on them

-2.17.7-4 Workers are not to climb the metal tubular frame of the scaffold to get the working platform Other, safermeans of access must be used – a ladder or access from the building

2.17.8 Safety working with Mobile Scaffold

2.17.9 Mobile scaffolds have restricted reach unless a guy wire secures them They are more susceptible tooverturning and require a smooth, level working surface A complete guardrail system must be used at elevationsabove 10 feet and shall be used at all working levels Scaffold should be moved when unoccupied and only bypushing from the base Wheel brakes must be set when scaffold is in use

2.18 MITIGATION OF RISK

Impact damage during pouring of concrete installation to be monitored constancy white concrete is poured Correctconnections or materials, ensure the final installation and connections are inspected and signed off withphotographic records by MEP coordinator on site M&E staff from contractor, architect and client

3 ACTUAL WORKS METHOD STATEMENT

3.1 Delivery and store

Materials arrived to site shall be inspected and stored according to manufacturer recommendations Materials shall

be stored in the covered and dry space During the receiving materials of Cooling tower, manpower shall be used tomake Cooling tower The Cooling tower and accessories shall be protected and covered with polythene sheets beforeinstalling Materials of Cooling tower is as below

3.2 COOLING TOWER ASSEMBLY AND INSTALLATION METHODOLOGY

-a) Safety officers and traffic control officers to station around the cordoned off areas until the crane andtransporters for Cooling towers arrive

-b) The Hoisting Manager must be on hand to supervise the positioning of the traffic control and safetyofficers, and to ensure that adequate numbers of 2-way radios are distributed for communications c) When the transporters are carrying the Cooling towers arrive, direct the transporter to the location reserved.d) All personnel must remain in position from this time until the lifting is declared over by the HoistingManager

e) Inspect Cooling towers Photograph and record any signs of external damages

f) Site logistic plan is shown as below

-g) Rigging team secures rope to the lifting lugs of the Cooling tower modules to the manufacturer’srecommendations Tie a guy rope to each end of the Cooling tower module Lift up the Cooling towermodule by 30 cm

h) When the Cooling tower module is fully lowered onto the 21st floor – Plant room, remove the hoistingropes and push Cooling tower modules in location

i) Cover each Cooling tower module with protective canvas sheet

j) Repeat the above sequence to the remaining Cooling tower modules

-Step by step to lift up Cooling tower modules as follow

 Beam rigging method

- Basin - Fan rigging method

- Casing rigging method

- Alternate discharge hood sealing rigging method

-Cooling tower installation works are detailed as below table:

Task contents Technical requirments Related documents

To check location,

dimension and shape of

Cooling tower concrete

base

To clean and mark location

of Cooiling tower concrete

base and vibration isolator

To prepare manpower &

tools for lifting cooling

tower modules

To prepare instrument to lift

up Cooling tower modules

To install Cooling tower

To use Tower crane to lift

up Cooling tower modules

from crane to level 21

To lift down Cooling tower

modules on location

To take out the cover and

install vibration insolator

To clean the cover

Connection works

Pipe connection works

 To check tilt of concrete base

 Surface of steel frame must be flatted

 All ouside connection joints of Cooling tower have

to be compatible with approved shop drawing

 Cooling tower modules installation works aremade by experienced workers and engineers

 To specify type and location of vibration isolator

 Steel plate of vibration isolator has to fix withanchor bolt on the concrete base

 Steel rope to lift and transfer has to overcomeCooling tower modules weight load

 Not allow to take out package of cooling towermodules

 All vibration isolators in standing freely andstability

 Not allow to adjust vibration isolator whenCooling tower has not installed and connected towater pipe

 Using wood to protect Cooling tower modules

 All inlet and outlet lines of Cooling tower have to

be connected by flexible connectors

 To clean pipe before connecting to pipe andacessories

 All welding joints have to be cleaned and painted

 Using flexibel conduit to connect cable to Coolingtower’s motor

 Not aceptable to directly connect pipe withCooling tower

Shop drawing

Specification document.Vibration isolator manual

3.3 Setting to work

-Not applicable

3.4 Testing/Insepection

3.5 T&C Register

-Not applicable

3.6 Reports

-4 APPENDIX

4.1 Certificate

4.2 Instrument catalogue and manual