Method Statement For Installation & Testing Of Liquefied Petroleum Gas LPG Piping System & Tank.

LPG System shall be installed & Tested by specialist supplier approved for the project.

  • Ensure all civil works are completed for the area of installation, and clearance is obtained from respective authorities to proceed further.
  • Prior to start the installation, refer to the approved shop drawings related to the area of installation and ensure that required materials are available at site as per approved material submittals.
  • Ensure the materials are stored properly and there is no mark of damage or deformity of any kind before issuing the material from site store.
  • LPG Tanks shall be installed on the concrete foundations as per approved foundation Drawings, ensure adequate space is available for valves, piping and for future maintenance.
  • Ensure that foundation should be horizontal & smooth finishes from top. Painting if required in civil detail.
  • LPG system Installation should be coordinated with other MEP services and obtain the approval of Consultants and Local Authorities ( Civil Defense ).

PROCEDURE FOR THE INSTALLATION OF FILLING LINE

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  • Filling line pipe used will be such 80 seamless carbon steel pipe will have 2 coat of red oxide primer and 2 coats of yellow paint for identification of Gas Line.
  • Install the pipe with suitable fittings according to the approved shop drawing & location.
  • Install the filling points as per approved drawing and location.

PROCEDURE AND INSTALLATION OF LPG TANK

  • On tank foundations mark the holes needed and drill to install 14 mm unfix.
  • Install LP Gas Tank on the foundation with the help of tower crane.
  • Secure the LP Gas Tank with 14 mm bolts.
  • Install the LP Gas Tank fitting by PTFE tape.
  • Connect the filling line to Gas Tank.
  • Pressurize the Gas Tank with 10 bar Nitrogen Pressure & check for any leak with soap solutions.
  • If any leak found, repair the leak and again pressure the gas tank with 10 bar pressure.
  • The nitrogen will be kept in the tank and not released until the time of commissioning.

PROCEDURE FOR THE INSTALLATION OF DROPPERS

  • Dropper pipes used will be hard drawn 15 mm copper pipes. These pipes will have 2 coats of yellow paint for identification of Gas Line.
  • Install the pipe with suitable fittings according to the approved shop drawing & location.
  • Dropper pipe ill be press 7.20 will pressure tested at 6 bar nitrogen pressure.

PREPARING THE PIPES

  • The pipe will be cut to the required length, the cut will be straight by used the copper pipe cutter.
  • Cut will be only 90% only using by pipe cutter, remain will be broken by hands.
  • Cleaning the portion where we have to do welding by cloth if required.

BRAZING PROCEDURE

  • Pipe end will be inserted in to the fittings.
  • Heat will be directed to the connection till we reach brazing temperature.
  • Filler material will be applied the connection.
  • Finally heat will be directed to the whole connection to allow the material to be the right place.

PROCEDURE AND INSTALLATION OF KITCHEN EQUIPMENT

  • Gas Meter and accessories such s Gas Meter, Manual Valve, Solenoid Valve, Second Stage Regulator will be assembled in the supplier work shop prier to shipment on site.
  • Assembled Gas Meter and accessories will be installed on the site as per approved drawings and connected to droppers by 12 mm copper coils.
  • Electrical connection for solenoid valve will be done as per approved drawings.
  • Pressure testing will be done along with droppers.

PROCEDURE AND INSTALLATION OF GAS CONTROL PANEL

  • Gas Control Panel will be installed near the fire alarm panel as per approved drawings.
  • Gas Detector will be installed in all shafts and O.T.S, where Gas Pipes are installed and connected to Gas Control Panel.
  • Interfacing between Gas Control Panel and Fire Alarm Panel will be done as per Civil Defense requirement.

TESTING OF LPG SYSTEM

  • Ensure installation of all piping is completed and all joints are ok.
  • Check all joints.
  • Identified the section to be tested, make a pressure test with the use of nitrogen gas.
  • Purging the pipes with nitrogen.
  • Start pressure test with use of nitrogen gas.
  • Start pressure test with use of nitrogen gas.
  • Dropper pipe will be pressure tested at 6 bar nitrogen pressure.
  • Test pressure will be minimum 1.5 time the maximum working pressure.
  • Check for leakage, if any leakage found, rectify the leakage and apply pressure again.
  • Test installation to be checked in presence of consultant.
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