Appendix C – Glossary
- bag house
- enclosure through which dust particles are collected as exhaust gases pass through a fabric filter
- blast furnace
- a smelting furnace into which compressed hot air is driven to complete the first stage in the production of all iron-based metals
- boiler
- a closed vessel in which water is heated, steam is generated, steam is superheated, or any combination thereof, under pressure or vacuum by the application of heat from combustible fuels, electricity or nuclear energy
- boom
- the main component of a crane used to carry the hoisting tackle
- breeching (gas flue)
- a transition component from the convection box to the flue
- catalyst
- an additive that accelerates a chemical reaction
- chain fall
- a hand/pneumatic/ electric-operated chain hoist
- coke oven
- tightly sealed unit to keep out air so coal cannot burn; rather it “bakes” with an intense heat up to 2100°F to produce coke
- come-along
- ratchet-type tool with a chain and hook used for pulling
- confined space
- an enclosed or partially enclosed and possibly hazardous working area that is not intended for continuous human occupancy that has limited access and egress and where the atmosphere may change during activities
- dog
- a tool used with a wedge or screw to fit up components
- ductwork
- a passage for air and gas flow
- ferrous
- metals dominated by iron in their chemical composition (i.e., carbon and low alloy steels)
- fibreglass
- glass reinforcement material (i.e., chopped strand mat, woven roving)
- hydrostatic test
- a strength and tightness test of a closed pressure vessel by water pressure
- lashing
- a wire rope fastened to itself to temporarily hold a component in position or to safety it until it is fastened
- metallurgy
- involves the science of producing metals from elements and the reaction of these metals to many different activities and situations
- non-ferrous
- metals that contain little or no iron in their chemical composition (e.g., aluminum, copper)
- outriggers
- extendable beams attached to a crane base mounting that rest on supports at the outer ends and provide a means of stabilizing the crane
- oxy-fuel cutting
- a group of cutting processes used to sever metals by means of the chemical reaction of oxygen with the base metal at elevated temperatures
- parts of line
- the number of individual ropes or cables supporting a travelling block in a tackle system
- penstock
- conveys water from the reservoir to the generating unit such as in a hydro-electric dam
- plasma-arc cutting
- an arc cutting process that severs metal by melting a localized area with a constricted arc and removing the molten material with a high velocity jet of hot, ionized gas issuing from the orifice
- pneumatic test
- a strength and tightness test of a closed air pressure vessel by air pressure
- precipitator
- an electrostatic filter that separates particulate matter from exhaust gasses
- promoter
- an additive used with rapid-cure resins to reduce excessive exothermic heat build-up
- purge
- involves using one gas to displace another gas in an enclosed space or system
- resin
- a polyester (vinylester) solid usually dissolved in styrene, but when mixed with a catalyst, forms a rigid thermoset plastic
- scrubber
- an apparatus used to remove solids from gases by entrainment in water
- shackle
- an anchor-shaped or u-shaped component with a pin that is used in rigging
- sling
- a wire rope or other material with eyes spliced on each end
- spreader bar
- beam used for hoisting trusses or long loads; also used to equalize the weight and to keep the load, such as tank plate, from buckling
- stack
- a vertical conduit used to discharge combustion products to the atmosphere
- stove
- used to heat air to speed combustion
- swing stage
- a suspended scaffold
- tackle
- an assembly of ropes and sheaves arranged for lifting, lowering and pulling
- tag line
- a length of rope used to control a load during lifting or lowering
- Tirfor™
- manual or pneumatic pulling machine
- tower crane
- a power-operated fixed or slewing tower that provides elevation and support for its jib
- tube expanding
- the pressure-tight joint formed by enlarging a tube end in a tube seat
- tugger
- a pneumatic or electric winch used for hoisting in tight areas where a crane is impractical
- vacuum box test
- a non-destructive test designed to find leaks in welded lap joints of a storage tank floor; soapy water is applied to the joint, then the air is removed from the sealed see-through box creating a vacuum and exposing the leaks
- vessel
- a container designed to contain liquids, gases, or solids
- water cutting
- a process of using a jet of water under high pressure to sever through a variety of construction materials
- water level
- flexible clear tubing partially filled with water or glycol used to determine the elevation of an object in relation to a known elevation