contractorsunlimited.co.uk

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Definitions (378)

1

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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. Further Reading
Source: contractorsunlimited.co.uk

2

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usgpd


US Gallons Per Day Further Reading
Source: contractorsunlimited.co.uk

3

1   1

en - euronorm


Standard issued by CEN/CENELEC normally prefixed by the national issuing body e.g. BS EN Further Reading
Source: contractorsunlimited.co.uk

4

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fpso


Floating Production Storage and Offloading vessel - a floating facility installed above or close to an offshore oil and gas field to receive; process; store and export hydrocarbons. Further Reading
Source: contractorsunlimited.co.uk

5

1   1

havs


Hand Arm Vibration Syndrome A potentially debilitating disorder resulting from prolonged exposure to vibration - specifically to the hands and forearms while using vibrating tools. Further Reading
Source: contractorsunlimited.co.uk

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1   1

hazop


Hazard and Operability Review Further Reading HAZOP Toolbox Page
Source: contractorsunlimited.co.uk

7

1   2

ist


Integrated Systems Test Further Reading
Source: contractorsunlimited.co.uk

8

1   0

pcd - pitch circle diameter


The diameter of an imaginary circle drawn through the bolt hole centres on a flange; flywheel; coupling etc Further Reading
Source: contractorsunlimited.co.uk

9

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aarh


Arithmetic Average Roughness Height Method of determining surface roughness. Further Reading Flange Surface Finish Toolbox Page
Source: contractorsunlimited.co.uk

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absolute pressure


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. Further Reading
Source: contractorsunlimited.co.uk


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