Page 26 - igem-g-4 edition 2_Neat
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IGEM/G/4 Edition 2
installation designer
Person responsible for designing (or overseeing the design process of) an installation as a
whole, and for ensuring that the design is suitable for the intended duty and that the location
is appropriate.
installation pipework
Any pipework or fitting from the outlet of a meter installation to points at which
appliances/equipment are to be connected. It does not mean:
a service (pipe) or distribution main or other pipeline
a pipe or fitting comprised in a gas appliance
a pipe or fitting within a meter installation
any valve attached to a storage container or cylinder.
installer
Person who organises and carries out new work, modification or repair.
insulation joint
Fitting having high electrical resistance, which can be inserted in a pipeline to insulate
electrically one section of pipe from another.
interlock
Component which monitors prescribed operating conditions and ensures appropriate action if
conditions deviate from the normal operating level.
intermediate lift (middle lift(s))
Lift(s) of a watersealed gasholder between the inner and outer lifts.
intermediate floor panels
Timber floor, usually located on and supported by a timber frame wall.
intermittent pilot
Pilot that is ignited prior to ignition of a main flame and is shut off simultaneously with it.
internal riser
Riser installed within the structure of a building.
interrupted pilot
Pilot which is ignited at each burner start-up and which is extinguished at the end of the main
flame establishment period.
interruptible supply/load
Supply or load for which it has been contractually agreed that the consumer may be
interrupted in accordance with specific terms and conditions.
intrinsically safe or intrinsic safety (I.S.)
Apparatus in which no spark or any thermal effect produced under prescribed test conditions
(including normal operation and specified fault conditions) is capable of causing ignition of a
given explosive atmosphere.
jacking rig
Equipment installed in a launch pit to install pipes as an excavation proceeds.
jet, relating to venting of gas
Stream of fluid (gas) which, on emerging from an opening (a vent stack), progressively
expands as it entrains the surrounding fluid (air), and in so doing transfers momentum to it.
jet cutting
Type of guided boring technique using pressurised fluid jets to provide the soil cutting action.
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