carbon straight chain hydrocarbon and is a reference fuel when testing the octane rating of petrol has an octane rating of 100. High Level Alarm An instrument device which will actuate an alarm usually visual and audible when the liquid level in the vessel exceeds the set level. It maybe a safe fill or operating level. Hot Work Permit A permit to work when using equipment which generates heat and sparks examples of hot work are welding, grinding, using an electric drill . Hydro Desulphuriser The removal of sulphur from a material by reacting the sulphur with hydrogen to form hydrogen sulphide. The hydrogen is a bi product of a process unit called a platformer or reformer. Hydrogen Sulphide A poisonous gas found in upstream and when refining crude oil .Sour crude contains high levels of hydrogen sulphide. Commonly referred to as H2S . Isotopes Radioactive elements such as uranium 235 and 238. Generally radioactive isotopes are used in the refinery for level gauging. Ionising radiation exposure is possible if systems are not maintained . Isomerization The chemical conversion of one hydrocarbon into another hydrocarbon of the same molecular weight and with the same hydrogen-carbon ratio. Iso-Octane The popular name for 2, 2, 4 trimethyl pentane. This hydrocarbon has excellent anti-knock characteristics and the octane numbers assigned to gasolines is based upon a value of 100. Hence the octane scale has n-Heptane as zero and Iso-octane as 100. Jump-over A piping connection made between pipe lines to allow redirection of process streams. Jump-overs are valved to facilitate redirection for blending or different processing. Knockout Drum A vessel in which suspended liquid is separated from a gas or vapour stream. Knock Rating A common expression used for octane number or octane rating. Lagging or Insulation Material used to insulate piping or equipment to reduce heat loss or to protect workers from skin burns.
carbon straight chain hydrocarbon and is a reference fuel when testing the octane rating of petrol has an octane rating of 100. High Level Alarm An instrument device which will actuate an alarm usually visual and audible when the liquid level in the vessel exceeds the set level. It maybe a safe fill or operating level. Hot Work Permit A permit to work when using equipment which generates heat and sparks examples of hot work are welding, grinding, using an electric drill . Hydro Desulphuriser The removal of sulphur from a material by reacting the sulphur with hydrogen to form hydrogen sulphide. The hydrogen is a bi product of a process unit called a platformer or reformer. Hydrogen Sulphide A poisonous gas found in upstream and when refining crude oil .Sour crude contains high levels of hydrogen sulphide. Commonly referred to as H2S . Isotopes Radioactive elements such as uranium 235 and 238. Generally radioactive isotopes are used in the refinery for level gauging. Ionising radiation exposure is possible if systems are not maintained . Isomerization The chemical conversion of one hydrocarbon into another hydrocarbon of the same molecular weight and with the same hydrogen-carbon ratio. Iso-Octane The popular name for 2, 2, 4 trimethyl pentane. This hydrocarbon has excellent anti-knock characteristics and the octane numbers assigned to gasolines is based upon a value of 100. Hence the octane scale has n-Heptane as zero and Iso-octane as 100. Jump-over A piping connection made between pipe lines to allow redirection of process streams. Jump-overs are valved to facilitate redirection for blending or different processing. Knockout Drum A vessel in which suspended liquid is separated from a gas or vapour stream. Knock Rating A common expression used for octane number or octane rating. Lagging or Insulation Material used to insulate piping or equipment to reduce heat loss or to protect workers from skin burns.