LR Addresses Fuel Changes when Entering and Exiting ECAs

By Eric Haun
Tuesday, June 17, 2014

From January 1, 2015, the maximum sulphur content of fuel oil used within the MARPOL Annex VI Emission Control Areas (ECAs) will be 0.10%, unless using an approved alternative means for controlling sulphur emissions. In most cases, the fuel used will be low-sulphur distillate oil (LSDO). Many ships operating both inside and outside ECAs will changeover between LSDO and residual fuel oil (RFO) when entering and exiting ECAs.

Lloyd’s Register Rule requirements
The Lloyd’s Register (LR) Rule requirements for fuel oil systems are contained within Pt.5 Ch.14 sections 2, 3 and 4; these contain design requirements for systems which are to operate on either LDSO or RFO grades, or both. LR also offers the optional descriptive note, DIST, for shipowners and operators applying industry best practice to the use of LSDO. The ShipRight Procedure for Assigning DIST Descriptive Note contains further guidance on measures to be considered by owners and operators.

In cases where existing fuel systems, engines or other equipment on LR classed ships are not suitable for operation on LSDO in addition to RFO, or where manufacturers have recommended equipment modifications, any proposed modifications must be submitted to LR for approval. If you are uncertain about whether equipment on board your ships requires approval, please contact your local LR office for advice.

Main points to consider when carrying out fuel changeover
Alternating satisfactorily between LSDO and RFO depends on owners and operators applying established changeover procedures and giving attention to maintenance and operating requirements. Some of the main points to consider are as follows:

Changeover procedures

  • Each ship should have an established and documented fuel changeover procedure which limits the maximum rate of temperature change when changing between RFO and LSDO.
  • Crews should receive training and instruction on applying the fuel changeover procedure.
  • Fuel oil spill returns from engines and other equipment should be routed and managed to avoid contamination of LSDO tanks with other fuels.
  • The compatibility of the RFO and LSDO should be checked. If instability occurs, it will generally be at the interface of the two fuels, necessitating more frequent filter changeover and cleaning to avoid blockage.


  • LSDO is less tolerant than RFO of worn fuel pumps; excessive barrel clearances will result in high leakage rates and failure to generate the required pressures, and may even prevent the engine starting. Excessive fuel supply and booster pump clearances will result in reduced delivery rates and pressures.
  • The cleaning and searching nature of LSDO relative to RFO, and the temperature differential between the two fuels, can result in seepage from pipe flanges, joints, seams and instrument connections.


  • Heating of LSDO will lower its viscosity below the minimal allowable limit of fuel equipment, requiring heating systems to be shut down and meaning that indirect heating must be avoided. Cooling or even chilling of LSDO may be required. Fuel with a higher minimum viscosity (e.g., ISO 8217 DMZ) should be considered as an alternative.
  • The base number of the engine lubricants (particularly cylinder oil) must be suitable for the sulphur content of the fuel being used.
  • The sulphur content of LSDO is expected to be close to the limit; marginal contamination with higher sulphur fuels will cause it to be noncompliant.

Maritime Reporter September 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

MacGregor's Deck Machinery for Sentinel Marine ERRV

MacGregor, part of Cargotec, will supply deck machinery for a new 65m emergency rescue & response vessel (ERRV) for Sentinel Marine. The ship has been designed

Towering Damen Marine Components Hits 150‏

Damen Marine Components (DMC), the oldest company in Damen Shipyards Group, celebrates its 150th anniversary today. DMC has grown from a very small shipyard established in Gorinchem in 1865,

MARAD Backs Emissions Reduction Projects

The U.S. Department of Transportation’s Maritime Administration (MARAD) announced it will provide more than $1 million to support the development of two new emission-reducing maritime solutions.

Marine Power

MARAD Backs Emissions Reduction Projects

The U.S. Department of Transportation’s Maritime Administration (MARAD) announced it will provide more than $1 million to support the development of two new emission-reducing maritime solutions.

Becker Marine, Kotug Sign MOU for LNG Hybrid Barge

Press release - Becker Marine Systems and KOTUG signed a Memorandum of Understanding to launch a LNG Hybrid Barge in the Port of Rotterdam with effect from June 2017.

USS Porter Hosts Career Day

The Arleigh Burke-class guided-missile destroyer USS Porter (DDG 78) hosted a group of 9th and 10th grade students from the International School of Vlore, Albania


Search for Ship Lost in Hurricane a Big Challenge

Deep seas may complicate efforts to find the sunken U.S. cargo ship lost off the Bahamas during Hurricane Joaquin, a federal safety investigator said, as a search

Weak Capesize Rates Depress Baltic Index

The Baltic Exchange's main sea freight index, which tracks rates for ships carrying dry bulk commodities, fell on Tuesday on weak demand for capesize vessels. The overall index,

U.S. Investigators Head to Florida to Probe Ship Lost in Hurricane

Federal safety investigators traveled to Florida on Tuesday to investigate the U.S. container ship lost at sea after being hit by powerful Hurricane Joaquin, leaving

Classification Societies

New Class Rules Favor Seawater Lubricated Props

Classification societies are changing their monitoring rules for seawater-lubricated propeller shafts in line with the rules governing the inspection and withdrawal

SubM Debut Now Set for February 2016

Outsourcing, E-Solutions Help Mariners “Say What You Mean, Mean What You Say, and Prove it.” The perennial “Year of Subchapter M” has been kicked forward again, this time to February 2016.

DNV GL Publishes New Classification Rule Set

DNV GL's new rules for classification of ships become publicly available online today following a development and review process involving 250 internal experts

Maritime Careers / Shipboard Positions Maritime Standards Naval Architecture Offshore Oil Pipelines Salvage Ship Electronics Ship Repair Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1409 sec (7 req/sec)