CIMAC WG08 | Relevance of Lubricant Flash Point in Connection with Crankcase Explosions

Crankcase explosion is caused due to the overheating of one of the cylinders in the main machinery space. The consequences of the explosion is severe and it affects the working of other engines.

Although there have been many occurrences of crankcase explosions recorded, there is no official body to whom they can be formally reported. As a consequence these occurrences have been reported randomly which has made it difficult to statistically analyse the number, the root cause and the severity of the explosions.

To avoid an increase in risk of crankcase explosions occurring, the engine makers and classification societies have developed common rules for oil mist detection and crankcase relief valves.

Concerns have also been raised over the use of the flash point of the lubricant as a reliable indicator for the risk of crankcase explosion. The flash point test has been adopted by all major used oil laboratories as a service standard to vessel operators.

This document provides an overview of several conditions that causes crankcase explosion and on the over reliance on the flash point as an indicator for crankcase explosion.

Download Publication [PDF]

CIMAC WG7 | Statement - 2018 Fuel Incidents
In 2018, the industry experienced a series of marine fuel incidents impacting the operation of more than 100 vessels. The specialists of CIMAC WG7 Fuels have prepared a statement .. more
CIMAC WG07 | Guideline - ISO 8217:2017 FAQ
The CIMAC Working Group 7 Fuels has prepared and issued a guideline to provide answers to the questions that may arise with the publication of ISO 8217:2017, the latest specification of .. more
CIMAC WG07 | Questionnaire
This document intends to collect information about the situations experienced where the Ignition and Combustion properties of the fuel are suspected of having influenced negatively on the .. more
CIMAC WG05 | Emission Calculation Check Guide
On 10 October 2008, the IMO Marine Environment Protection Committee at its 58th session, by Resolution MEPC.177(58), has adopted amendments to the Technical Code on Control of Emission of Nitrogen .. more
CIMAC WG05 | Statement EPA NPRM
Control of Emissions of Air pollution from Locomotive Engines and Marine compression-ignition engines less then 30 litres per cylinder. This publication discusses the following issues: .. more
CIMAC WG02 | Proposal IACS Attendance TAT
Subject: Attendance at Type Approval Tests (TAT) Background: Within the last years quite some experience was gained during Type Approval Tests. We have realized that Class surveyors well attended .. more
CIMAC WG07 | Statement EPA CARB
Use of low sulphur diesel fuels in coastal waters. CARB / EPA propose that Ocean going ships must use only distillate fuels (diesel oil) with a low sulphur content and a low content of aromatic .. more