Skip to main content

MARPOL Annex VI

Regulations for the prevention of Air pollution from ships





Revised Annex VI entered into force: 1st July 2010

Applicaion
  • All ships
  • Exceptions;
    • Damage to ship or equipment.
    • Saving life at sea.
    • Safety of ship.

Survey & Certification
  • All ships of 400 GT & above IAPP Certificate
  • Subjected to;
    • Initial survey
    • Annual survey
    • Intermediate survey
    • Renewal survey

Regulations
  • 12: ODS
  • 13: NOx
  • 14: SOx & PM
  • 15: VOC
  • 16: Incineration
  • 17: Reception Facility
  • 18: F.O. Quality & availability



Regulation 14: SOx & PM
  • Current;
    • Global: 5% S 2020 : 0.5% S (After 2018 review)
    • ECA: 1% S
  • Applies to M/E, A/E, Boiler, IG
  • Methods;
    • Compliant Fuel
    • Cold Ironing
    • Exhaust gas cleaning (E.g.: Scrubbers)
    • LNG
  • ECAs;
    • Baltic Sea (SOx Only)
    • North Sea (SOx Only)
    • North American Area (SOx , NOx & PM)
    • US Caribbean Sea (SOx , NOx & PM)
  • O. Change-over;
    • Prior entry into ECA fully change-over to compliant fuel (low sulfur).
    • Must have written change-over procedures.
    • Must not commence change-over prior exiting ECA.
    • Record quantities of Low sulfur F.O. with date, time & position.
      • At Completion of change-over prior entry
      • At Completion of change-over after exiting
In log book under guidelines of Administration or in ORB.
Important – Cylinder lube oil must also be changed over with F.O. (to Low TBN)

Comments

Popular posts from this blog

Analog Addressable Fire Alarm System

Main Panel Block Diagram

The fire alarm system continuously monitors the detectors.Detectors are divided into zones. (Using Software configuration file in the base board).Detectors are connected to the system through loops. (physically)The Loops are connected to the loop boards. Each Board can have 3 loops. Each loop can have 254 detectors. (Depending on the address size)Each Loop has an address and each device has an address given using DIP switches. (These are stored in the Software config file)Devices send digital data packets containing the Addresses and the Data.The digital data packets are sent digitally using analog signals through the twisted pair cables. (Analog Addressable Signals)

ID address on DIP switches

All addressable loop units must be given an address between
1-254 to be operational. The loop units located on the same
physical loop must all have unique addresses. The address is
set by a 8 pole DIP switch located on each addressable
unit.
The DIP switch values follow th…

Boiler Scale Formation

Boiler Corrosion

Galvanic Corrosion
Can occur due to Oxygen attack or contact of two dissimilar metals in an electrolyte (eg: Copper + Steel).

Oxygen Attack (Pitting Corrosion)
At the Anode:

Metal goes into solution               Fe ⟶ Fe2+ + 2 e-OXIDATION

At the Cathode:

Oxygen is reduced           ½ O2 + H2O + 2 e- ⟶ 2 OH- REDUCTION

The variables pH, temperature and the concentration of oxygen affect the rate of corrosion.
To avoid this alkaline conditions are maintained in the boiler.
Oxygen reacts with iron to give ferric oxide (rust) Fe2O3 which will not protect the metal from further attack and metal is continuously dissolved.

4Fe + 3O2 → 2 Fe2O3 Hematite (ferric oxide)

Oxygen corrosion is usually observed as localized pitting on a metal surface. (Pitting Corrosion)



This form of corrosion can be reduced by:

1.by reducing the level of oxygen as far as possible using mechanical means which include deaeration and/or judicious heating, coupled with good feed-system design (Cascade Tank)

by ensuring that t…