Log book- Week 11

Work Week: 11  (20-24 August 2018)

20 August

(Monday)

• NON-DESTRUCTIVE EXAMINATIONS(NDE) METHOD APPLY

• Magnetic Particle Inspection(MPI)

Relatively easy to apply, and part surface preparation is not as critical as it is for some other NDT methods. This method uses magnetic fields and small magnetic particles (i.e.iron filings) to detect flaws in components including castings, forgings, and weldments.  The component being inspected must be made of a ferromagnetic material (materials that can be magnetized to a level that will allow the inspection to be effective) such as iron, nickel, cobalt, or some of their alloys.

• Dye Penetrant Inspection (Dye Pen)

Dye Penetrant Inspection (DPI), also called Liquid Penetrant Inspection (LPI) or Liquid Penetrant Testing (PT), is a widely applied and low-cost inspection method used to locate surface-breaking defects in all non-porous materials (metals, plastics, or ceramics). It is used to detect cracks, surface porosity, lack of penetration in welds and defects resulting from in-service conditions (e.g. fatigue cracks of components or welds) in castings, forgings, and welding surface defects.  For applications where a greater sensitivity to smaller defects is required, the fluorescent penetrant method is preferred.  The basic procedures are Pre-cleaning, Penetrant application, penetrant dwell time, Penetrant removal, developer application, developer dwell time, Inspection and Post-Cleaning.

• Ultrasonic Test (UT)

UT uses high frequency sound energy to conduct examinations and make measurements. It can be used for flaw detection/evaluation, dimensional measurements, material characterization, and more.  Materials that are rough, irregular in shape, very small, exceptionally thin or not homogeneous are difficult to inspect.  Cast iron and other coarse grained materials are difficult to inspect due to low sound transmission and high signal noise.  Linear defects oriented parallel to the sound beam may go undetected.

UT inspection systems consist of Pulser/receiver (an electronic device that can produce high voltage electrical pulses), Transducer (driven by the pulser, the transducer generates high frequency ultrasonic energy. The sound energy is introduced and propagates through the materials in the form of waves. When there is a discontinuity (such as a crack) in the wave path, part of the energy will be reflected back from the flaw surface.) and Display devices (the reflected wave signal is transformed into an electrical signal by the transducer and is displayed on a screen. In the applet below, the reflected signal strength is displayed versus the time from signal generation to when an echo was received. From the signal, information about the reflector location, size, orientation and other features can sometimes be gained.)

• Radiographic Test (RT)

Radiographic definition is the abruptness of change from one density to another. Test-part is placed between the radiation source and film (or detector). The material density and thickness differences of the test-part will attenuate (i.e. reduce) the penetrating radiation through interaction processes involving scattering and/or absorption. The differences in absorption are then recorded on film(s) or through an electronic means.  In industrial radiography there are several imaging methods available, techniques to display the final image, i.e. Film Radiography, Real Time Radiography (RTR), Computed Tomography (CT), Digital Radiography (DR), and Computed Radiography (CR). There are two different radioactive sources available for industrial use; X-ray and Gamma-ray. Computed Tomography (CT) is one of the lab based advanced NDT methods that TWI offers to industry. CT is a radiographic based technique that provides both cross-sectional and 3D volume images of the object under inspection.

21 August

(Tuesday)

• Asked by Mr Amin to read about the Statutory Reguation.
• Statutory Regulation is an agreement from flag for deviation.
• Sratutory Survey
• On behalf of Flag Administration, according to the following regulation

1. SOLAS
2. Malpol
3. Colreg
4. Loadline convention
5. Tonnage convention
6. OSV code
7. Special purpose ship code (SPS)

• Ask to understand

1. Which ship/type of vessel the code applicable
2. What are the size of ship applicable
3. Any exemption can be granted if the ship cannot comply to the code.
4. List the main document/certificate will be issued when the ship is comply to the code/convention.
5. List an exampe equipment,component/construction related to each code/convention. 

22 August

(Wednesday)

• Holiday Haji

23 August (Thursday)

• SOLAS
  The present regulations, unless expressly provided otherwise, do not apply to:
  (i) Ships of war and troopships.
  (ii) Cargo ships of less than 500 gross tonnage.
  (iii) Ships not propelled by mechanical means.
  (iv) Wooden ships of primitive build.
  (v) Pleasure yachts not engaged in trade.
  (vi) Fishing vessels.

24 August

(Friday)

COLREGS - International Regulations for Preventing Collisions at Sea

Masthead Light - means a white light placed over the fore and aft centreline of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on either side of the vessel.

Sidelights - means a green light on the starboard side and a red light on the port side each showing an unbroken light over an arc of the horizon of 112.5 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on its respective side.

Sternlight - means a white light placed as nearly as practicable at the stern showing an unbroken light over an arc of the horizon of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel.

Towing light - means a yellow light having the same characteristics as the “sternlight”

"All round light" means a light showing an unbroken light over an arc of the horizon of 360 degrees. "Flashing light" means a light flashing at regular intervals at a frequency of 120 flashes or more per minute.