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Job Description:

  • 1) Lays pipe to repair and extend nonwelded gas mains and to install or repair service pipes between mains and residences: Drills hole in section of main to which new pipe will be fitted and inserts inflated rubber bag to seal off flow of gas.

  • 2) Removes faulty pipe by unscrewing bolts at joint with hand wrench.

  • 3) Lays gas mains by fitting spigot end of one pipe section into bell end of another.

  • 4) Bolts joints together.

  • 5) Places wooden blocks under pipe to adjust pipe to line and grade, testing gradient with carpenter's level.

  • 6) Fastens steel cap over free end of gas-main extensions.

  • 7) Drills hole or installs reducing fitting in main where service pipes begin.

  • 8) Bolts saddle clamp around main, preparatory to welding.

  • 9) Drills hole through welded saddle clamp into main, using power drill.

  • 10) Cuts, threads, and screws together sections of pipe forming service line, and lays service line in trench.

  • 11) Bolts end of service line to saddle clamp, using special compression coupling to produce gas-tight connection.

  • 12) Removes rubber expanding bag to resume flow of gas and caps holes with screw plugs.

  • 13) Installs various gas-main attachments, such as drips, ells, and tees.

  • 14) Tests pipe for weak joints by forcing air into pipe with air compressor and coating joints with soap and water, and notes formation of bubbles, indicating leak.

  • 15) Tightens bolts or repairs leaky joints.

  • 16) May install gas meters.

  • 17) May install pipes beneath roads, lawns, or locations where not feasible to dig trenches, by forcing pipe through earth with special pipe jack.

  • 18) May direct crew in excavating trench and positioning pipe.

  • 19) May fuse bonds to pipe joints, using holder and flash chemicals, to concentrate high temperatures at point of fusion.

  • 20) May install and repair service lines only and be designated Pipe Fitter, Street Service.




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End Of Job Description for: "GAS-MAIN FITTER"
DOT:   862.361-014

Job Number: 4435