Method of Statement for Fire Fighting Works (Part-2)

(5) Vertical risers

  • Vertical risers shall be parallel to walls and column lines and shall be straight and in plumb. Risers passing from floor to floor shall be supported at each floor by MS angle with clamp as per specification of pipe support.
  • The space in the floor cut outs around the pipes work may be closed using cement concrete (1:2:4 mix) or steel sheet, from the fire safety considerations, taking care to see that a small annular space is left around the pipes to prevent transmission of vibration to the structure.
  • Riser shall have suitable supports at the lowest point.

(6) Sprinkler Heads & Accessories

  • Installation of sprinkler heads will be done after pipe work flushing is completed.
  • Apply the PTFE tape only to the male portion of the sprinkler and install the upright sprinkler head using the wrench provided by the manufacturer, and in such a way that the arms are parallel to the branch pipe. Maintain a clearance of 1” between the deflector of upright sprinkler and ceiling. Ensure that sprinkler heads have the correct finish and temperature rating.
  • For fixing sprinkler heads, 15 mm. dia. M.S. Socket is to be screwed to range pipes at the locations as’ per drawings. Dead plug shall be fixed in the socket.
  • If sprinkler head is to be provided away from range pipe, M.S. Pipe nipple of suitable size be used to extend the sprinkler head and socket is welded at desired location.
  • During occupation of the building, sprinkler heads shall be provided in place of dead plugs. Teflon tape shall be used on threaded portion.

(7) Fire Hose Reel / Fire Hose Cabinets

  • Check cabinets are approved size and dimension. Inspect for signs of damage.

  • Locate exact location of these Cabinets as per approved shop drawings and with careful measure of elevation and plumb.

  • Fix cabinet using recommended anchor and bolts. Proceed with installation of accessories, lock shield valve, landing valves, etc. taking in consideration of approval for these devices.
  • Prior to the installation Foreman will read, understand and strictly follow the manufacturer’s instructions.
  • Examine the location of the hose reel cabinets and ensure that opening is sufficient for fixing all equipment and the mounting height of the hose valve and hose racks is as per the approved shop drawings and to the requirements. Hose reel, hose valves and fire extinguishers are of approved type and have the correct rating.
  • The cabinet (without the equipment) will be installed where applicable. Branches to the hose rack (reel) / hose valve will be installed on site to ensure actual entry point to the cabinet. Location of Pipe sleeves shall be as per approved drawings.
  • Hose reel & valve will be installed as per the manufacturer’s instructions at the correct mounting height.
  • Keep fire extinguisher inside the cabinet along with the hose rack. Ensure that the top of the wall mounted extinguisher do not exceed from the levels as per approved drawing and specification.

(8) Drain Piping of the System:

  • Fittings will be of the eccentric pattern to ensure proper drainage and the elimination of air pockets wherever necessary.
  • In Sprinkler Network at far end Drain Pipe shall be provided on last Sprinkler to remove Air from Sprinkler Network.

(9) Sleeves

  • The branch lines will be hanged to the proper level and will be connected to the cross main. Where piping is embedded or passing through masonry or concrete, sleeves will be provided as per specification mostly of MS or GI material.
  • Pipe sleeves of diameter larger than the pipe by least 50 mm shall be provided wherever pipes pass through walls and the annular spaces shall be filled with felt and finished with retaining rings.

(10) Sealant

  • After the removal of the concrete forms and installation of the pipeline, the annular space between the sleeve and the pipe shall be filled with caulking material leaving enough space at both ends of the sleeve for sealing.

(11) Under Ground Pipe

  • Where mild steel pipes are to be buried under ground the same shall be treated anti corrosion treatment. The top of the pipes shall be not less than 100 cm below the ground level.
  • Where this is not practicable, permission of the Engineer-in-charge shall be obtained for burying the pipes at lesser depth.
  • After the pipes have been laid, the trench shall be refilled with the excavated soil and rammed and any extra soil shall be removed from the site of work by the contractor.
  • Underground pipe shall be laid at least 1 meter away from the face of the building preferably along the roads and foot paths.
  • As far as possible lying of pipes under road, pavement and large open spaces shall be avoided.
  • To facilitate detection of leak and isolation of defective portion of pipe, valves shall be provided in underground pipe at suitable locations.
  • As far as possible such valves shall be provided over ground or at Basement. If the valves are to be provided below ground, suitable masonry chamber with cover plate shall be provided.
  • Locations where vehicles can pass shall be avoided for provision of valve below ground

(12) Anti-Corrosive Protection on Under Ground Pipe

  • Corrosion protection tape shall be wrapped on M. S. Pipes to be buried in ground.
  • 2 No’s of corrosion protection tape minimum 4 mm thick shall comprise of coal tar/asphalt component supported on fabric of organic or inorganic fiber and conform to requirement of IS 10221 Code of practice for coating and wrapping of underground mild steel pipe line.
  • Before application of corrosion protection tape all foreign matter on pipe shall be removed with the help of wire brush and suitable primer shall be applied over the pipe thereafter.
  • The primer shall be allowed to dry until the solvent evaporates and the surface becomes tacky.
  • Both primer and tape shall be furnished by the same manufacturer. Corrosion protection tape shall then be wound around the pipe in spiral fashion and bounded completely to the pipe.
  • There shall be no air pocket or bubble beneath the tape. The overlaps shall be 15 mm and 250 mm shall be left uncoated on either end of pipe to permit installation and welding.
  • This area shall be coated after the pipe line is installed. The tapes shall be wrapped in accordance with the manufacturer’s recommendations.
  • If application is done in cold weather, the surface of the pipe shall be pre- heated until it is warm to touch and traces of moisture are removed and then primer shall be applied and allowed to dry.

Flushing, Cleaning of Piping and Equipment:

  • After piping is erected, all piping systems including main header line and branch line will be cleaned to remove all mill, welding scale, oil, corrosion, and other construction debris. 
  • Prior to hydraulic testing, all pipe work systems including valves, strainers and fittings will be washed thoroughly. Any washing of the piping systems will be carefully carried out where there are isolation valves or equipment are employing.
  • Any stoppage due to foreign matter or air lock which is found to impede the flow of fluid will be removed, either before or after the systems are in operation.
  • Do not operate pumps or equipment until debris has been removed from the respective system has been flushed out.
  • Flushing of the system can be done from a pumping source with minimum flow rate to provide a velocity of 3 m/ sec.
  • Flush the piping system until all debris is removed and clean water comes out.
  • Automatic devices which can become clogged during the cleaning process will be disconnected and will not be connected permanently until the cleaning process is complete.
  • Enough draining points will be left for this purpose. These points will be the lowest point of the area/zone and the water supply point.

Painting:

  • All pipes & fittings above ground and in exposed locations shall be painted with two coat of zinc chromate primer and two or more coats of synthetic enamel of fire red color paint.
  • Clean the MS / GI Pipe
  • Clean the black pipe with cotton rag to remove any dust or grease on the pipes before painting.
  • Fabrication of Pipe:
  • After Cleaning, fabrication work of Sprinkler network shall be completed on ground level.
  • Paint the Pipe with 1st Coat Red Oxide (Before Fabrication)
  • After Fabrication of MS Pipe, paint the black pipes with one coat of approved Red-oxide Primer will be applied as per Manufacture’s film thickness or Microns measured as per Sample paint.
  • Please ensure both sides (top & bottom) are painted evenly.
  • Put the painted pipes in a good ventilation condition for 24 hours for the paint dry.
  • Paint the Pipe with 2nd Coat Red Oxide
  • After completion of 1st Coat apply, 2nd coat of Red oxide shall be applied of as per Manufacture’s film thickness or Microns measured as per Sample paint.
  • Put the painted pipes in a good ventilation condition for 24 hours for the paint dry.
  • Paint the Pipe with 1st Coat of Enamel Paint:
  • After drying, red oxide, 1st Coat of Enamel Paint will be applied on Pipe with as per Manufacture’s film thickness or Microns measured as per Sample paint.
  • Please ensure both sides (top & bottom) are painted evenly.
  • Put the painted pipes in a good ventilation condition for 24 hours for the paint dry.
  • Install the Pipe
  • After the 1st Coat of Enamel Paint dry, install the pipes.
  • Paint the Pipe with 2nd Coat of Enamel Paint:
  • After Completion of Hydro Test, 2nd Coat of Enamel Paint of Approved make of as per Manufacture’s film thickness or Microns measured as per Sample paint.
  • Please ensure both sides (top & bottom) are painted evenly.

Testing of the System:

  1. Initial Pressure Testing (24 Hour Test)
  •  After completion of the work, all valves/ fittings shall be installed in position and entire system shall be tested for 24 hours at a pressure of 10 Kg/cm2 to 15 kg/ cm2.
  • Plug all the openings
  • Close all the drain valves.
  • Fill complete pipeline with water avoiding any air column. (For this purpose keep the drain valve at the highest elevation slightly open, while filling water when line is completely filled with water close the valve)
  • By a pressure pump pressurize the line to an intermediate pressure of 10 Kg/cm2 to 15 kg/ cm2. Wait for 24 Hours.
  • Check all major joints for any visible leak.
  • The drop of pressure up to 0.5 kg/cm2 shall be accepted.
  1. Hydrostatic Testing of Pipe Work
  • Make available a highlighted drawing of area intended for hydrostatic pressure testing. Indicate on the drawing the location of vent/drain valve, plugged connections and water pressure pump connection.
  • Make sure the test witness timing and pressure duration are agreed by the client/consultant.
  • Place safety warnings at all points where personnel may pass through within the vicinity of testing.
  • Make sure that all equipment item such as sprinklers; valves etc. are subjected to the pressure test.
  • Attach the pressure pump to the desired location through an isolation valve, by pass valve and calibrated pressure gauge to indicate the pressure on the pipe work.
  • The entire pipe work shall be hydrostatically tested for not less than 2 hours at 15 bars (or 1.5 times the working) pressure without leak.
  • Physically check and ensure that all pipes undergoing test is strongly supported and addition of pipe work will not introduce undue stress on any support.
  • Make sure that all pipe works are suitably plugged.
  • Connect a calibrated and approved pressure gauge and fix an isolation valve just below the pressure gauge.
  • Apply pressure gradually until it reaches the test pressure. The test pressure will be as per agreed terms and as per requirements.
  • All piping shall be tested to hydrostatic test pressure of at least the 1.5 times of operating pressure, but not less than 15 kg./sq.cm. For a period not less than 24 hours. All leaks and defects in joints revealed during the testing shall be rectified to the satisfaction of the Engineer-in-Charge.
  • Piping repaired subsequent to the above pressure test shall be re-tested in the same manner.
  1. Final Testing (Automation of the System)
  •  After completion of Hydro Test, all operation checks shall be carried out for automatic operation of the systems. For this purpose, landing valves may be opens at different locations. The exercise shall be repeated couple of times to ensure trouble free operation of the system.
  • Flow Test: The design flow of pumps shall be checked. The pump shall be operated after opening a number of landing valves at different locations. Design pressure is be maintained in the pump house. Water discharge is to be
  • Measured by drop in level in UG tank for a certain period. All pumps shall be tested one by one. The flow rate shall be not less than as specified while maintaining the design pressure in pump house.

Pipe Identification Installation:

  • After the pipe layout hydrostatically tested and finally painted, install pipe identification as per Site Requirements.
  • Background Color –Red.
  • Letter Color –White.
  • Lettering Size –as per Size of Pipe or Equipment.
  • Flow –Direction Arrows –integral with piping-system

References:

  • Project Specification.
  • Indian Standard.
  • BS Code.
  • Local Fire Authority Regulations.
  • NFPA (National Fire Protection Association) Code.
  • NBC Code.

122

About Jignesh.Parmar (B.E,Mtech,MIE,FIE,CEng)
Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical). He is member of Institution of Engineers (MIE) and CEng,India. Membership No:M-1473586.He has more than 16 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.

One Response to Method of Statement for Fire Fighting Works (Part-2)

  1. Bhawani Singh says:

    please provide information in pdf format.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: