We have 18 entries in our Glossary for this letter.
Arithmetic Average Roughness Height
Method of determining surface roughness.
Flange Surface Finish Toolbox Page
The measurement of pressure relative to the pressure in a vacuum.
It is equal to the sum of the pressure shown on a pressure gauge and atmospheric pressure.
The closeness of the agreement between the result of the measurement and the conventional true value of the quantity.
AF - Across the Flats
Measurement between 2 parallel faces on a nut. Indicates the size of spanner or socket required to tighten or loosen the nut.
AGA - American Gas Association
Promoters of gas use in the US and publishers of widely used calculations for gas density (AGA 8) and gas flow (AGA 3).
As Low As Reasonably Achievable.
Most often used in reference to chemical or radiation exposure levels.
As Low As Reasonably Practicable.
Applied to the reduction of risk by taking measures to reduce risk until the cost of further measures is grossly disproportionate to the benefits they would deliver.
A contract that generally relates to a specific and discrete set of services such as design or maintenance.
Not as extensive as an Integrated Service Contract.
The process of using heating and slow cooling to toughen steel (or glass) by reducing its brittleness and internal stresses.
A device that uses Pitot tubes to measure the gas flow rate within a pipeline.
ANSI - American National Standards Institute
A private non-profit organization that administers and coordinates the U.S. voluntary standardisation and conformity assessment system.
Active Pharmaceutical Ingredient
API - American Petroleum Institute
A trade association founded in 1919 sponsored by the oil and gas industry to develop Recommended Practices for the industry.
American Standard Code for Information Interchange established to achieve compatibility between various types of data processing equipment.
ASCII Code Toolbox Page
American Society of Mechanical Engineers.
Professional organisation focused on technical; educational and research issues of the engineering and technology community.
American Society for Testing and Materials.
EU Directive 94/9/EC covering equipment and protective systems for use in potentially explosive atmospheres.
Hazardous Area Toolbox Page
AWG - American Wire Gauge
A standarised method for specifying the properties - including diameter - of electrical and electronic wire.
Electrical and Electronic Wire
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