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Wednesday, January 27, 2021

Method Statement for Installation and Inspection of Firefighting & Sprinkler System

1.0 Purpose

The general purpose is to ensure that a Safe System of Work (SSOW) applies to all work activities, as such this is the exemplar way to prove that the risk associated with a specific activity has been carefully considered and appropriate controls implemented. The specific purpose of this Method Statement procedure is to describe the method of installation and inspection of the Sprinkler System (SS).

2.0 Objective

This method statement is critical to the health and safety (H&S) of the activity it relates to. It is too followed and adhered to, any deviation or changes must be first authorized by the site supervisor

3.0 Scope

This method statement for firefighting system covers the below activities:

This Method Statement procedure highlights the installation and inspection of the Fire Fighting & Sprinkler System (FASS).

4.0 Quality of Installation

Quality of installation and materials at the site will be ensured by the project team consisting of a Project Manager, Project Engineers, QA/QC engineers, and the site Supervisor. All the installation at the project will be according to the project specification. applicable standards and /or industry norms. All installation work shall be factually adopted and carried out as per the Manufacturer's/Client's Consultant's Health & Safety recommendations for handling and use of the materials/substance. Main Contractor/Sub-Contractor/Third party shall ensure that all workers are aware of the applicable H&S requirements.

5.0 Equipment

  • Drilling Machine12” 
  • Grinding Machine
  • Pulls Spring
  • Welding Machine
  • Steel Tape Measure
  • Tone Generator
  • Screw Driver Test Pen
  • Screw Driver ((Flay and Cross))
  • Insulation Tape
  • Multitier Metter
  • Angle Grinder
  • Hammer Drills
  • Hammer ((Small))
  • Chisel
  • Air Blower
  • Knife
  • Players
  • Cutting Players
  • Scaffolding
  • Ladder
  • Leather Gloves
  • Hard Hat
  • Goggle Glass
  • Dust Mask
  • First Aid Kit
  • Soldering Gun
  • Two-way radio
  • Clamp Metter
  • Measuring equipment
  • Hack saw
  • Threading Machine
  • Pipe wrenches & Spanners, etc.
  • The following Tools and Equipment will be used for Fire Fighting System Installation:

6.0 Storage and Handling Equipment

The pipes for the testing and installation of the Firefighting Sprinkler will be stacked in the workplace site store on a balanced/leveled surface at a recommended height of not more than 1.7m. From the bottom layer of the pipe’s stacking, fittings will be distinctly packed and stored as per the sizes recommended and required for the ongoing installation project. All open ends of installation pipes will be covered properly to protect from external matter, dirt, debris oil contamination, etc.

7.0 General Piping Installation Guidelines

  • Firefighting pipework shall be installed following the piping general arrangements and their supporting drawings, specifications, and schedules.
  • Installation of pipework shall be carried out under conditions satisfactory to the consultant. All firefighting work conducted and accomplished will be as per the approval of the consultant.
  • Scheduling of work to carry out the installation of pipework shall be agreed upon and to the satisfaction of the main contractor and shall be co-coordinated with the work schedules of other all stakeholders such as trades, and disciplines involved in the overall construction work.

8.0 Responsibilities

  • Ensuring that all the preparation and application works are conducted as per the contract scope of work and the Manufacturer’s SDS.
  • Ensuring that the advancement of works is accomplished according to the pre-planned program and according to the approved method statement.
  • Ensuring that all the equipment, devices, machinery, material, or substances needed for executing the work are available as per the pre-planned construction program.
  • Make sure to coordinate with the Main Contractor and sub-contractor, MEP Coordinator & HSE Personal for the safe and appropriate execution of the work.
  • To provide all the essential information and the distribution of responsibilities to the construction team.
  • The Supervisor Will be Responsible for the following:
  • The Supervisor/Forman will accomplish his duties by maintaining regular coordination with the project engineer/line manager on daily basis. Furthermore, to ensure proper distribution of the workforce in the required and planned designated locations.
  • To provide to the project engineer a day-to-day progress report highlighting the activities gained and discuss with him the planned activities for the next day.
  • Ensuring that the day-to-day work is progressing as planned and advising the MEP/Construction project engineer of any requirement for additional resources.
  • Strongly be aware of test frequencies regarding the pipework and Hydrostatic.
  • To handle the disposal of waste materials regarding the instruction received by the project engineer/line manager.
  • To ensure full coordination with the health and safety specialists to maintain an SSOW and appropriate housekeeping of the worksite, by practicing the approved HSE initiatives and further ensuring that all his working team is well aware of the same to prevent severe and fatal accidents and losses.

9.0 Methodology

Installation of Fire Sprinkler System

  • The installation of the Fire Sprinkler System shall be as per the approved shop drawings and recommendations of the National Fire Protection Association (NFPA) 13.
  • FSS installation Pipe’s hangers shall be appropriately spaced at intervals as per the approved shop drawing.
  • The installation of Fire Sprinkler Threaded piping will be made with a standardized and authentic pipe sealing compound (jute and mastic combination methodology) applied on male threads only. The ends of the FSS Installation pipe will be renamed before fitting.
  • Sizes for sizes of pipe 2-Inches and below are made threaded & 2 ½” and above sizes are generally grooved type. The groove for FSS pipes can be a cut groove or roll groove.
  • All underground installations of the Fire Sprinkler System will be welded type. All piping coming underground will be wrapped particularly with polyvinyl chloride tape.
  • All Piping must be firmly supported by a combination network consisting of pipe hangers and strong support brackets. Pipe hangers are always used to support the ‘dead load” of the pipe system. The pipe’s installation will be as scheduled.
  • Sprinkler Head Location (SHL) shall be installed following approved system plans and recommended layout.

Installation of Sprinkler Head

  • All the Sprinkler Heads must be installed according to current recommendations of the National Fire Protection Association (NFPA) 13.
  • The system piping must be appropriately sized as per the approved drawings and calculations to make sure the minimum required flow rate at the sprinkler head.
  • Install the Sprinkler Heads after the piping is in place to avoid any mechanical fault or technical malfunction.
  • In case of a thread leak, remove the unit, apply new pipe Thread seal tape, and reinstall.
  • The face of the sprinkler device should be installed a nominal 3/8” to 1” behind the finished ceiling line, a proper adjustment for the sprinkler may be done via the push-on escutcheon plate to compensate for variation in the Installation of the Sprinkler Head.
  • Hand tightens the sprinkler (to protect it from damage) into the fitting using the proper size of the wrench.
  • To install the escutcheon plate, align it with and press it over the sprinkler body until the external edge of the escutcheon meets the mounting surface appropriately.

Installation of Butterfly Valve

  • The Butterfly Valve (BV) should be installed as per the approved drawings by making sure that it is located where it will be easily accessible in case of any operation, inspection, and maintenance.
  • During installation make sure that the valve disc does not impede the operation of other Firefighting systems components, if so, immediately adjacent to the butterfly valve.
  • When it is difficult to close the valve and required more force to adjust, it may be due to debris lodged in the sealing area. This may be mitigated by backing off the handwheel and closing it again, several times if required. The valve should never be forced to seat by applying a wrench to the handwheel as this may destruct the valve components.
  • The inlet and outlet piping adjacent to the valve should be appropriately supported to prevent excessive stress on the valve body. The valve should not be used to force a pipeline into position as this may result in misuse/distortion of the valve body.

Installation of Flow Switch

  • The flow switch should be installed as per the approved and recommended drawings where easily accessible during any operation, inspection, and maintenance.
  • The Flow Switch (FS) should be/recommended to be mounted on a horizontal or vertical pipe. On Horizontal pipe, they should be installed on the top side of the pipe where flow switches will easily accessible.
  • Drain the system and drill a hole in the pipe with a circular saw with a slow-speed drill. The whole size shall not be exceeding from 2-inches.
  • Properly Clean the inside pipe of all growth for a distance equal to the pipe diameter on either side of the hole.
  • Roll the vane so that it may be inserted in the hole properly, do not bend or crease the vane.
  • Insert the Vanes so that the arrow on the saddle points in the direction of the water flow properly.
  • Make installation of the saddle strap and tighten nuts alternately.
  • Avoid the rub of the vane from the inside of the pipe. 

B. The Methodology of Pressure Testing of Piping

SPRINKLER & FIRE FIGHTING SYSTEMS PIPING

  • Method of Testing
  • Plug all the openings
  • Close all the drain valves.
  • Fill the pipeline with water avoiding any air column build-up. (For this purpose, keep the drain valve at the highest elevation lightly open while filling water when the line is filled with water close the valve)
  • By pressure, the pump pressurizes the line to an acceptable and required pressure, eg, 100 psi. After pressurizing the pipe; wait for 5 minutes, and then again examine and observe all major joints for any visible leak.
  • If the system is normal and operational as intended as per point No. 4, again pressurize the system to 150 psi and wait for another 10 minutes for any drop in pressure or leakage.
  • If the SPRINKLER & FIRE FIGHTING SYSTEMS PIPING is found to be leakproof as per item No. 5 pressurizes the line to the recommended testing pressure level and intact as it is for 2 hrs.

Indication on Fire Alarm Panel (FAP) & Repeater Panel (RP) regarding the zone being operated.

10.0. Health & Safety Hazards

  • Before commencing any work, the team shall strictly follow the Manufacturer’s/ Client’s / Consultant’s Health & Safety recommendations for handling and use of the materials and ensure all involved personnel shall be aware of the same. The general safety guidelines are given below:
  • Ensure the work area is safe & clean.
  • All employees shall adopt safe working practices.
  • Safety equipment (Safety helmet, safety shoes, coveralls, gloves, goggles, face mask as applicable) to be worn at all times.
  • When working at a high level, the appropriate safety harness shall be used and secured whilst working-extra care shall be taken whilst using tools at a high level to prevent dropping.
  • Ensure sufficient lighting is available during all stages of installation & testing.
  • Report all accidents no matter how small to the Safety Officer on duty.
  • Ensure any electrical isolation permit is obtained if required, for installation of any electrical equipment, panel, cable, wires, and accessories. 

Identified Hazard and Control Measures

Responsibilities

Project Manager

  • The Project Manager shall be responsible for overall project execution.
  • He will coordinate with the client and head office.
  • He is responsible for progress monitoring, attending review meetings, and resource management.
  • Overall, he will be responsible for the timely completion of the project following all contractual requirements.

Project Engineer

  • Setting out for installation and commissioning of Fire Alarm and Fire Fighting Systems are carried out according to the specifications, drawings, and approved method statement.
  • Provision of all necessary information and distribution of responsibilities to his construction team in consultation with the construction manager.
  • The work progress is monitored following the required program and reported the same to the Construction Manager.
  • The implementation of any request that might be raised by the Consultant.
  • Allocation of manpower, materials, and equipment in consultation with the Construction Manager also monitoring their timely supply at the construction location.

Supervisor

  • The carrying-out of the work and the proper distribution of all the available resources in coordination with the Site Engineering daily.
  • Daily reports of the works are achieved and coordinated for future planning with the site Engineer.
  • Incorporate all the QC and Safety requirements as requested by the concerned Engineer.
  • Meeting with any type of unforeseen incident or requirement.

Download File

MS-FA-Testing and Installation of Firefighting Sprinkler


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