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Wear Down Gauging in tail shaft refers to measuring the wear and tear on the tail shaft of a ship's propulsion system. H...
19/01/2025

Wear Down Gauging in tail shaft refers to measuring the wear and tear on the tail shaft of a ship's propulsion system.

Here's an overview:

Purpose
1. Monitor wear: Track tail shaft wear to prevent excessive wear, vibration and potential failures.
2. Schedule maintenance: Plan maintenance and repairs.
3. Ensure safety: Prevent accidents caused by tail shaft failure.

Gauging Methods
1. Linear measurement: Measure tail shaft diameter using calipers or micrometers.
2. Ultrasonic thickness measurement: Assess wall thickness.
3. Magnetic gauging: Measure wear using magnetic sensors.
4. Laser alignment: Verify tail shaft alignment.

Key Measurement Points
1. Tail shaft diameter: Measure at multiple points.
2. Propeller shaft sleeve: Check for wear.
3. Stern tube bearings: Monitor bearing clearances.
4. Seal wear: Inspect stern tube seals.

Acceptable Tolerances
1. Diameter reduction: Typically 0.5-1.5% of original diameter.
2. Wall thickness: Minimum 75% of original thickness.
3. Bearing clearance: Consult manufacturer's specifications.

Frequency of Gauging
1. Initial inspection: After installation or overhaul.
2. Regular inspections: Every 5,000-10,000 hours or 2-5 years.
3. Post-repair inspections: After maintenance or repairs.

Standards and Regulations
1. Class society guidelines: (e.g., ABS, DNV, LR)
2. International Maritime Organization (IMO)
3. American Bureau of Shipping (ABS)
4. Society of Naval Architects and Marine Engineers (SNAME)

Tools and Equipment
1. Calipers
2. Micrometers
3. Ultrasonic thickness gauges
4. Magnetic gauging devices
5. Laser alignment tools

Best Practices
1. Follow manufacturer guidelines.
2. Document measurements.
3. Analyze wear patterns.
4. Schedule maintenance accordingly.
5. Train personnel on gauging procedures.

19/01/2025

Calibrating the safety valve of an Auxiliary (aux) Boiler ensures it opens at the set pressure, preventing potential explosions.

Here's a step-by-step guide:

Pre-Calibration Preparation

1. Review manufacturer instructions: Consult the safety valve manufacturer's manual.

2. Ensure boiler shutdown: Lockout/tagout the aux boiler.

3. Isolate the safety valve: Disconnect or block the valve from the boiler.

4. Verify valve type: Identify the safety valve type (e.g., spring-loaded, piston-operated).

5. Gather calibration tools: Pressure gauge, test pump, and calibration equipment.

Calibration Procedure

1. Remove the valve cover: Access the valve's internal components.
2. Inspect and clean: Check for debris, corrosion or damage. Clean if necessary.
3. Set the test pressure: Use a test pump to apply pressure to the valve.
4. Determine the set point: Identify the pressure at which the valve opens (typically 1.1-1.3 times the maximum allowable working pressure).
5. Adjust the spring tension: Turn the adjustment screw to achieve the set point pressure.
6. Verify valve lift: Check the valve lifts (opens) at the set point pressure.
7. Repeat the test: Perform multiple tests to ensure consistent results.

Calibration Methods

1. Hydrostatic testing: Use water pressure to test the valve.
2. Pneumatic testing: Utilize compressed air or gas.
3. Hydraulic testing: Employ hydraulic fluid pressure.

Post-Calibration Procedures

1. Record calibration results: Document the set point pressure, valve lift, and calibration date.
2. Reassemble the valve: Replace the valve cover.
3. Reconnect the valve: Reconnect the safety valve to the boiler.
4. Test the valve: Perform a final test to ensure proper operation.
5. Certify the valve: Obtain certification from a qualified technician or authority.

Safety Considerations

1. Personal protective equipment: Wear safety gear (gloves, goggles, etc.).
2. Lockout/tagout: Ensure equipment is securely locked out.
3. Pressure safety: Monitor pressure levels during testing.
4. Valve integrity: Verify valve condition before calibration.

Regulatory Standards

1. ASME Boiler and Pressure Vessel Code (BPVC)
2. API 520: Sizing, Selection, and Installation of Pressure-Relieving Devices
3. OSHA 29 CFR 1910.119: Process Safety Management
4. Local and national regulations

Recommended Tools

1. Pressure gauge (calibrated)
2. Test pump
3. Calibration equipment (e.g., deadweight tester)
4. Safety valve test kit
5. Valve adjustment wrench

19/01/2025

MYTH AND FACT ABOUT SEAMAN

Myth 1: Seamen are isolated and lonely
Myth: Seamen spend months at sea, isolated from family and friends.
Fact: Modern ships have internet connectivity, allowing seamen to stay in touch with loved ones.

Myth 2: Seamen are uneducated
Myth: Seamen lack formal education.
Fact: Most seamen hold professional certifications, degrees or diplomas in maritime-related fields.

Myth 3: Seamen only work on cargo ships
Myth: Seamen exclusively work on cargo vessels.
Fact: Seamen work on various types, including cruise ships, tankers, passenger ferries and offshore platforms.

Myth 4: Seamen have limited career advancement
Myth: Career growth opportunities are limited.
Fact: Experienced seamen can advance to senior officer positions, shore-based management roles or become ship captains.

Myth 5: Seamen face constant danger
Myth: Seamen face life-threatening situations daily.
Fact: Modern safety regulations and training minimize risks, making seafaring a relatively safe profession.

Myth 6: Seamen are away from home for extended periods
Myth: Seamen spend years at sea.
Fact: Typical contracts last 3-6 months, followed by equal time off.

Myth 7: Seamen lack job security
Myth: Seamen face frequent layoffs.
Fact: The shipping industry's steady demand ensures relatively stable employment.

Myth 8: Seamen have limited access to medical care
Myth: Medical facilities are unavailable onboard.
Fact: Ships have onboard medical facilities and emergency evacuation procedures.

Myth 9: Seamen are disconnected from technology
Myth: Seamen lack access to modern technology.
Fact: Modern ships employ advanced navigation, communication and entertainment systems.

Myth 10: Seamen are rough and unrefined
Myth: Seamen lack cultural sophistication.
Fact: Seamen come from diverse backgrounds and cultures, and many appreciate art, literature and music.

NO TO MCFS 18
08/03/2024

NO TO MCFS 18

02/03/2024

General Overview of Bunkering Procedure:

1. Planning and Coordination:
Before bunkering, the ship's crew and the bunker supplier communicate and coordinate the details, such as the type and quantity of fuel required, delivery time, and location.
Verify that all safety and environmental regulations are followed and that necessary permissions and paperwork are in order.

2. Pre-Bunker Checks:

Ensure that all safety equipment is in good condition and ready for use.
Conduct a pre-bunker meeting with the ship's crew and bunker supplier to review the bunkering plan, safety procedures, and emergency protocols.

3. Mooring and Connection:
The ship is securely moored to the berth to prevent any movement during bunkering.
Connect hoses and other transfer equipment between the bunker barge or tanker and the ship's bunkering connections.

4. Sampling:
Before the actual bunkering starts, samples of the fuel are usually taken for quality testing. This ensures that the fuel meets the required specifications and standards.

5. Bunkering Operations:
Start the fuel transfer according to the agreed-upon plan.
Constantly monitor the flow rate, pressure, and other parameters during bunkering to ensure a safe and efficient process.

6. Communication:
Maintain continuous communication between the ship and the bunker supplier throughout the bunkering operation.

7. Completion and Documentation:
Once the required quantity of fuel has been transferred, stop the bunkering operation.
Complete all necessary documentation, including quantity received, quality reports, and any other relevant paperwork.

8. Disconnecting and Departure:
Disconnect hoses and other transfer equipment safely.
Conduct a post-bunkering meeting to review the operation, discuss any issues, and ensure that all safety protocols are followed.

9. Post-Bunkering Checks:
Conduct post-bunkering checks to ensure that there are no leakages, spillages, or other issues.

10. Record Keeping:
Maintain detailed records of the bunkering operation, including quantities received, quality reports, and any incidents that occurred.

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As the new year unfolds, embrace the opportunities it brings. May your journey be filled with resilience, success, and joy. Happy Chinese New Year!

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