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COMPRESSED AIR - Coggle Diagram
COMPRESSED AIR
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Hazards of LP / HP
HP air can be lethal, especially if entered through the bloodstream
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Explosion (dieseling) occurs when high pressure air is brought into contact with oil / grease, silicone grease is used instead
flexible hoses are often used to navigate tight spaces, they must be whipped and bound to prevent flailing
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Air Bottles
HAZARDS: Bottles must be racked, PPE must be used, Hoses must be in good condition and connected with the correct spanner, a good O seal must be used and bottles must be filled slowly
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High Pressure Air
High Pressure Air can be divided into INSIDE MACHINERY SPACE (IMS) and OUTSIDE MACHINERY SPACE (OMS)
It can also be divided further into High Pressure Air operating at 276 Bar and reduced High Pressure Air operating below this pressure as required by specific equipment (via a pressure reducing valve)
Advantages: easily stored, easily distributed, flexibilty and reliability and low risk of fire
Alarms and Warnings
The Hamworthy is a basic unit that only warns and stops for high water temperature (54*) and low oil pressure (0.69 Bar, falling not on initial start up)
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Low Pressure Air
Low pressure air is supplied at 8 Bar, and is produced by either a hydrovane / rotary compressor, or via a reducing station from the HP ring main
Uses: pneumatic tools, radar wave guides, emergency stern seal inflation and pneumatic surveillance panels