Home page||
Tanker Notes ||
Container Ship Operations ||
Ocean Navigation ||
Measures For Handling Cargo Oil Having A Flash Point Exceeding 60c
Handling cargo oil having a flash point exceeding 60c without maintaining cargo oil tanks in inert condition need extreme caution. Confirm that use of IG is not required by regulations at the discharging port and shore facility. Refer to the special precautions as listed out in the latest edition of ISGOTT for above such operations.
Also, a formal (stage 2) Risk Assessment will need to be carried out and the office informed, prior to such decision.
Ensure that sufficient reliable evidence available that the flash point of the cargo oil is above 61 degree C and the temperature of the cargo oil does not exceed 5 degree C less than the flash point.
However, when cargoes with a flashpoint exceeding 60 degree C are carried at a cargo temperature higher than their flashpoint less than 5 degree C, the tank should be maintained in an inert condition.
If the previous cargo oil is having a low flash point, purge the inflammable gas by IG until the level of the gas reduced down to 2% by Volume or less beforehand.
If another cargo oil having a low flash point has been loaded into other remaining tanks, prevent the mixing of such vapor by isolating vapor of such grades.
Cargo oil tanks must be inerted prior to washing the tanks with high temperature water.
Take the following measures cargo discharging operations.
Ensure that flame arrestors are fitted in vent posts.
Take preventive measures against static electricity
Refer to relevant Chapter in the latest edition of ISGOTT.
Piping system requirement
All piping systems within cargo tanks,
saltwater ballast tanks, double-bottom
tanks, pump rooms, pipe tunnel(s) and
cofferdams, including void spaces
adjacent to cargo tanks, and pipes
that pass through the deck or connect
to the shell, are examined and tested
under working conditions. The surveyor
checks for tightness and looks to establish
if their condition is satisfactory.
In addition to annual and intermediate
survey requirements, all machinery used
for liquid cargo services is examined,
including ventilation pipes, pressure
vacuum valves and flame screens.
The inert gas systems are tested under
working conditions. The systems’ main
components are examined internally.
On the basis of results of these
examinations, additional checks can
be required, which may include
dismantling, hydrostatic tests and/or
thickness measures, or all three.
Related articles:
Operation of inert gas system
Oil pollution control method
Gas freeing arrangement for oil tanker
Handling guideline for oil cargo
Oil pollution prevention method
Preparation for loading oil cargo
How to prevent spillage of oil cargo
General precautions for oil cargo loading in tankers

Other info pages !
Ships Charterparties Related terms & guideline
Stevedores injury How to prevent injury onboard
Environmental issues How to prevent marine pollution
Cargo & Ballast Handling Safety Guideline
Reefer cargo handling Troubleshoot and countermeasures
DG cargo handling Procedures & Guidelines
Safety in engine room Standard procedures
Questions from user and feedback Read our knowledgebase
Home page

ShipsBusiness.com is merely an informational site about various aspects of ships operation,maintenance procedure,
prevention of pollution and many safety guideline. The procedures explained here are only indicative,
not exhaustive in nature and one must always be guided by practices of good seamanship.
User feedback is
important to update our database. For any comment or suggestions please Contact us
Site Use and Privacy - Read our privacy policy and site use information.
//Home //Terms and conditions of use
Copyright © 2015 www.shipsbusiness.com All rights reserved.
