Page 35 - igem-g-4 edition 2_Neat
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IGEM/G/4 Edition 2
             peak demand shaving
             Gas held to supply “needle peaks” at times of severe weather, either within days or on a daily
             basis.

             pearson survey
             Method of locating faults in pipe protective wrapping, by measurements taken at ground level
             above the pipe and without excavating.

             permanently moored boat (see also “waterborne accommodation”)
             Vessel that is not used primarily for navigation, whether or not it is any person’s sole or main
             residence.

             permit to work
             Formal written document used to control certain types of work that are potentially hazardous.

             pig
             Piston-like device, for example a steel frame and cup washers of rubber, neoprene or other
             suitable material, such that compressed air, gas or water pressure will propel  it along a
             pipeline or pipework.

             pig trap
             Fabricated pipe fitting for inserting and removing pigs from a pipeline while in service.

             piggable
             Capable of passing a pig.

             pilot bore
             Creation of the first (usually steerable) pass of any boring process which later requires back
             reaming or similar enlarging.

             pilot burner
             Small gas flame or main gas flame at a low burn rate for igniting gas at the burner ports.

             pilot control
             Auxiliary system that controls a main regulator or other device.

             pilot flame
             Start-gas flame established at a separate pilot burner which is utilized to ignite a main flame.

             pilot fuel
             Small quantity of oil injected into the cylinders of dual-fuel engines to cause ignition of the
             gas/air mixture therein.

             pipe and cable locator
             Instrument used for the detection of buried metallic pipes and cables.

             pipe array
             Lengths of buried pipe laid in parallel within a controlled site, being manifolded together and
             connected  to a gas  supply/discharge system  via regulation equipment with or  without
             compressor facilities for the purpose of storing  high pressure gas.

             pipe jacking
             Technique of installing a line of circular pipes into the ground by pushing from a fixed point
             with hydraulic rams.

             pipeline
             System of piping with all associated equipment and stations up to the point of delivery.







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