Used when only half of the view is to be drawn in section and the other half is not.

A compound consisting of chlorine, bromine, iodine and fluorine.

A gaseous extinguishing agent that does not leave residue after discharge. It works on the principle of removing the air for combustion thus extinguishing the fire.

An opening into a boiler drum or vessel that is much smaller than the manhole and is used for cleaning and inspection purposes.

A property that causes the material to resist indentation or abrasion.

Defined in WHMIS as a controlled product that is intended for disposal or is sold for recycling or recovery.

The static pressure of a fluid expressed in terms of the height of a column of the fluid.

A pipe that collects steam or water from or distributes it to a number locations.

The ends which close off the ends of the boiler shell; may also be referred to as 'end plates' or, in fire tube boilers, as 'tube sheets'.

A form of thermal energy due to the activity of the molecules in a mass and that can be transferred from one body to another.

Anything that transfers heat from one substance to another without allowing the substances to mix.

Latent heat given up in changing from a gas to a liquid.

Latent heat absorbed in changing from a solid to a liquid.

A heat transfer device that uses the heat rejected by a refrigeration process to provide heat. A combined cooling and heating unit.

Equipment that is installed to reclaim heat that is normally lost during the blow-down process.