Work Procedure for Fire Fighting pipe installation

Srinivasan

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Sep 7, 2017
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Work Procedure for Fire Fighting pipe installation

Procedure for Fire Fighting Pipe Installation
  • Obtain clearance from the civil team for installation of Pipes
  • All the material is shifted to correct location
  • Before starting the work all pipes & fittings quality to be certified by the PMC / Client Engineer.
  • Piping will be installed by the experienced welder / pipe fitters in the supervision of site Engineer
  • Test Certificates to be shown during the execution
  • Enough safety care like safety belts, eye protection is taken in case of work at the heights.
  • To get the Hot work / Welding M/c / Gas Cutting / all the machineries equipment permits before start the work
  • Mark the pipe route as per the approved drawings and coordinate with other service vendors
  • Check all pipes and fittings to be used for joint are free from defects, dents or defects and are straight. Remove pipes and fittings with defects and replace with acceptable materials
  • Remove dirt from inside of the pipe and fittings before fit up
  • Welding electrodes shall be stored and handled as per Manufacturer’s instructions
  • Cut the pipes to the required length using an appropriate pipe cutter, or profile cutter, allowing for provision of pipe fitting later.
  • The pipes shall be checked by the assigned foreman for its squareness and straightness, after being cut to the correct angle,
  • Do the Welding joints after making ‘V’ groves
  • Branch pipes drop for sprinkler are in plumb and matching ceiling levels
  • All terminal connection in relation to flow diagram
  • Clear the pipe line
  • Do the two coats red – oxide paint after cleaning the pipe line
  • Do the two coats Red colour paint as after PMC / Client Engineer Instruction
  • Hydraulic testing after flushing the complete system
  • Check for all joints for air tightness by pressure testing
  • Operate each and every valve on the system to see if the valves are functioning properly.
  • Check all clamps, support and hangers provided for the pipes
  • Make inspection request for PMC / client approval

Procedure for Pipe to Pipe Fit Up
  • Lay the two (2) pipes on top of the pipe stand or adjustable support, with each pipe ends aligned near each other using adjustable bolt stopper
  • Level one length of pipe using spirit level.
  • Bring lengths together leaving only a small welding gap. In normal practice, a welding electrode of 2.4 mm
  • size, remove of its covering and bend in the middle at an angle of 30° is inserted between the two pipes to obtain a perfect welding gap. It is recommended to weld adjustable bolt stoppers (small piece of plate about 12 mm thick with an M-16 hexagon bolt and nut welded at one end as shown in Figure for perfect an d easy alignment.
  • there is no high-low situation or mis-alignment between t e two outside surfaces Tack weld at the top and bottom. Rotate the pipes 90°.
Procedure for 45 degree Elbow to Pipe Fit Up
  • Lay one pip e on top of the adjustable pipe support.
  • Level the pipe using spirit level.
  • Place the 45 degree elbow to t he end of the pipe leaving a small welding gap
  • Place a 45 degree spirit level on the face of the elbow until bubble i centered and ensure that there is no high-low situation or misalignment between the two out side surface s.
  • Tack welds in place both the pipe and the elbow.
Procedure for Pipe Fit Up
  • Lay one pipe on top of the adjustable pipe supports.
  • Level the pi e using spirit level.
  • Place the 90 ° elbow to end of the pip e leaving a small welding gap.
  • Place a spirit level on the face of the elbow and ensure that t here is no high-low situation or mis-alignment between t he two outside surfaces.
  • Tack weld in place both the pipe and elbow.
Procedure for Flange to Pipe Fit Up
  • Lay one pip e on top of t e on the adjustable Pip supports.
  • Level the pi e using spirit level.
  • Place the tee at the end of the pipe leaving a small welding.
  • Place a spirit level on the face of the tee and ensure that there is no high low situation or mis-alignment between t he two outside surfaces.
  • Tack weld in place both the pipe and tee

Procedure for Tee to Pipe Fit Up
  • Lay one pip e on top of the adjustable pipe support.
  • Level the pi e using spirit level
  • Bring the flange at the end of the pipe leaving a mall welding gap. (In case a Weld neck type of flange is used). If a slip-on type of flange is to be used, insert the pipe to the flange bore up to 5 mm depth from the flange face to give enough space for a fillet weld.
  • Align the top two holes o f the flange with the spirit level.
  • Tack weld in place the pipe and flange.

Safety and Environment Measures
Preparation

  • Notify all concerned in site for the date of material delivery
  • Coordinate with Safety Department for delivery trucks access routes
  • Ensure all workers involved in the hauling operation put on PPE all times
  • The lorry transporting the pipes will b e guided to the designated hoisting area and rel eased all the latching belts only after the lorry parked firml

Pipe Lifting
  • Ensure safe work procedure for lifting operation is observed
  • Ensure proper lifting method - with the correct equipment’s a re used
  • Ensure the pipes are properly placed on the designated location before releasing the hoisting hook

During Site Execution
Ensure workers are distributed to each designated place
Ensure workers at all times to be in roper gear where required
Ensure all workers assigned are involved in its p articular task .
Brief individual worker the roles and responsibilities before start work.
Ensure the pipe lengths to suit site routes into designated work area.
Ensure pipe support systems are installed accordingly as required.
Ensure all tools to be used have been inspected and tag by Safety Dept.
Ensure work areas are clearly marked to restrict access to authorized personnel only
Ensure that equipment’s to be used are properly tagged and checked.
Ensure that welders are qualified, with the correct PPE's, and well versed on the job at hand with the latest revised drawing/s.

Housekeeping
  • Maintain cleanliness and orderly stocking of materials & tools.
  • Pick up and dispose wastes & other debris prior to leaving site area.
  • Remove safety yellow tape or other warning devices that were used to control access to the work area.
  • Store tools, equipment and unused materials properly at the end of the workday
Safety Inspections
  • It shall be responsibility of the Supervisor to routinely inspect the physical areas under their control in pipe welding works. This inspection shall include determining if pipes, supports, scaffolds and ladders are appropriately installed and/or use, and if the job site is cleaned up after the day’s work
  • Remove the adjustable bolt stoppers after fit up and grind flush all tack welded points making sure that the re is no over grinding of the base metal
  • Place the spirit level over both pipes. Adjusting the pipe support can easily do this. Ensure that