- Temperature and alarm sensor for pumps
- Monitoring system for hydrocarbon gas
- Bilge level monitoring devices
- Interlock for lighting and ventilation.
- Cargo pump room should be mechanically ventilated and the capacity should be 20 air changes per hr of the volume of the pump room.
- Pump room bulkhead with ER should be class A-0.
- Spray shield around pump seals
- In order to avoid static electricity cargo is loaded directly into tanks ,the loading pipes as far as practicable should be led to the lowest area.
- Exd – light covers
- Height of double bottom in PR - B/15 or 2 meter whichever is less but not less than 1 mtr.
- An emergency intake located above 2m , the PR lower grating. The emergency intake should have damper fitted which is capable of being opened and closed from exposed main deck and grating level. – 15 air changes per hour.
- Fixed sampling line to attach portable gas meter
1. High cost: Manganese bronze is a costly alloy, making it less economical for large propellers. 2. Low strength-to-weight ratio: Compared to other propeller materials like nickel-aluminum bronze or stainless steel, manganese bronze has a lower strength-to-weight ratio. 3. Susceptible to corrosion: Manganese bronze can corrode in seawater, especially when exposed to high velocities and turbulence. 4. Poor cavitation resistance: Manganese bronze is more prone to cavitation damage than other materials. 5. Difficult to cast and machine: Manganese bronze is challenging to cast and machine, making it less desirable for complex propeller geometries. 6. Limited weldability: Manganese bronze has poor weldability, making repairs and modifications difficult. Nickel-aluminum bronze or stainless steel are commonly used for propellers due to their: - High strength and durability - Excellent corrosion resistance - Good cavitation resistance - Ease of casting and machining - Weldability
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