Air bottle Regulations,Air bottle Mountings, Air bottle Internal Surface Coatings And Safety Devices on Main Air bottle

SOLAS Air receiver Regulations

» Total capacity of air receivers must be sufficient to give at least 12 starts for reversible engine, and at least 6 starts for non-reversible engine, without refilling the receivers.

»There must be two identical main air receivers and one emergency bottle for every vessel. 

Mountings in Air Receiver:

>Fusible plug

composition – Bismuth 50%, Tin 30%, Lead 20%,

Melting point: 220F (104.4C). Fitted at the reservoir's bottom or on reservoir at ship side

>Atmospheric relief valve:-Provided for back-up of fusible plug. In case of ER fire when 

CO2 flooding is required, this valve is opened before evacuating ER

.

>Spring loaded safety valve:

          Setting pressure:32 bar (for 30 bar working pressure),with 10% rise in 

accumulation of pressure. May be fitted directly or with extension

>Compensation ring: When a hole is cut or machined in pressure vessel, 

higher stresses will subject to the material around the hole, and to reduce this,compensation rings are fitted. 

It is a flange on which a valve or fitting is usually mounted. 

>Manual Drain valve or Automatic Drain valve

>Pressure gauges

>Access doors

>Main starting air valve, auxiliary starting air valve, filling valve, service air or whistle air valve

Internal surface coating:

Graphite suspension in water,Linseed oil, Copal vanish or Epoxy coating having basic properties of anti-corrosive,anti-toxic or anti-oxidation.

Safety devices on Main Air Bottle:

>Fusible plug.

>Pressure Relief Valve

>Atmospheric Relief Valve.

>Low Air Pressure alarm.

>Automatic or remote control Moisture Drain Valve

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