Intoduction to Boilermaking Terms Flashcards
Align
To line up two or more parts
Alloy
A fused mixture of two or more metals, or a metal and one or more other metals and/or nonmetals
Alternating Current (AC)
Electrical current that reverses its flow at set intervals
American Iron and Steel Institute (AISI)
An industry organization responsible for preparing standards for steels and steel alloys based on the SAE code system
American Society of Mechanical Engineers (ASME)
An organization that has developed and maintains many of the codes used in the construction of boilers and pressure vessels
Amperage
A measurement of the rate of flow of electric current
Arc
Flow of electricity through an air gap that melts the electrode
ASTM International
An organization that developed a code system for identifying and labeling steels
Backfire
a loud snap or pop as a torch flame is extinguished
Backing
a weldable or nonweldable material used behind a root opening to allow defect-free welding at the open root of a joint
Bag house
A structure containing bags that filter flue gas to remove fly ash
Base metal
metal to be welded, cut, or brazed
Bit
Any of a number of tools for use with a drill or grinder
Black liquor
A byproduct of the papermaking process. It consists of a mixture of limestone, salkcake, water and lignin
Boiler feedwater
The water supplied to a boiler to produce steam
Breeching
The duct or pipe connecting the exhaust-gas discharge from a boiler furnace to the stack
Buckstays
Retaining beams that are placed around the furnace sidewalls every 80-20 feet to prevent the walls from blowing out should there be an explosion in the furnace
Burr
A sharp, ragged edge of metal usually caused by cutting
Carbide
A very hard material made from a mixture of carbon and metal
Carburizing flame
A flame burning with an excess amount of fuel; also called a reducing flame
Chamfer
A bevel cut into the edge of thebase metal
Chuck
A part of drill that allows attachments of different size bits
Co-generation
A facility that uses waste heat or other products from a process to produce electricity
Code
A set of regulations covering permissible materials, service limitations, fabrication, inspection, testing procedures, and qualifications of welders
Coefficient of thermal expansion
The amount a unit length of material expands for each degree of temperature increase
Collet
Part of a grinder or other tool that allows different attachments to be used with them. Usually requires two wrenches to operate
Combustion residue
Byproducts of combustion which build up inside a boiler during operation. This residue can build up in large quantities and can become a hazard during maintenance operations should it break loose and fall
