What is Enclosed Space and Precautions while entering it

In this article a thorough discussion about
the enclosed spaces and precaution that need to be taken by any seafarer while
entering into it, has been discussed. Over the year many seafarers have lost
their lives due to some or other type negligence done while entering in to the enclosed
space. So what is about enclosed spaces that make us to take so many steps
before entering in to? Let’s find out answer to these questions in

What is enclosed space entry on ship?

As name suggests, it is a type of cavity or
space that is normally closed all time, and any type of illumination, or
ventilation does not take place in it for long time. Due to these factors,
toxic gases tend to accumulate in them and posses an utmost threat to anyone
who is entering in to these cavities. Generally chain locker room,
cofferdam, tanks (oil), pump room and crankcase comes under these
types of spaces. All personal onboard ships that can or may take part in any
type work related to these spaces or to be done on them, should thoroughly
aware about the consequences that may come if proper precautions are not taken.
So, it becomes imperative for everyone to
have knowledge of precautions that are taken and procedures need to be done
before doing any work related to these spaces.

Precaution need to be taken while entering in
to the enclosed space

First of all a valid and duly signed work
permit is taken from the chief engineer about any work related to these.
Numbers of hours that the people doing the job, will take are also written
down. Always two personals are involved in this whole process of carrying out
any repairs in these spaces.
1)      Make
sure that all the pipes fitting that are having suction or discharge to these
tanks are properly closed. In case of pump room or paint room we can skip this
2)      Make
sure that the valve of these pipelines are properly closed and locked to
prevent any type of flow taking place in to these tanks.
3)      Then
the place need to be cleaned thoroughly, and make sure that there is not
contaminants remaining in it. Generally outside these spaces we put a railing
to prevent any accidental drop of a tool or a person in to these spaces.
4)      Make
sure that your CABA set of SCBA equipments are working properly if
you are using one of them.
5)      Next
big thing in this whole process is to ventilate the spaces very well. We have
blowers on ship that are used to provide fresh air to these tanks.
6)      Before
entering into following readings need to be taken
a)      Oxygen
-21 %
b)      Hydrocarbon-
less than 1 % of LFL
c)       Toxic
gases – under regulated PPM
d)      According
to IMO, prescribed limit is 50% of the TLV.
7)      There
should be provision for checking the atmosphere continuously when the work in
going on in the tanks.
8)      Again
special attentions need to be taken for ventilation when the work is going on.
9)      Proper
lighting arrangements need to be done as these spaces are always dark. But the
lighting arrangements should be secured type and no spark should take place
when this whole work is going on. Because the toxic gases inside may
inflammable also.
10)   Rescue equipments need
to be maintained all time and should be readily available in case any emergency
occurs on board.
11)   A person should always
be guarding the space and should keep an open eye on the person who has gone
inside this space. And it very necessary that the person standing outside
should be active enough to carry out all these observations.
So this was all from this article. 

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Ashish S

Hi there! Well I am not a writer, just writes what can help people-that's it. Interested in listening from you. Loves to talk about gadget, music, nerdy stuff and witty substance in the talks. A Good respect in heart- for web.

One thought on “What is Enclosed Space and Precautions while entering it

  • December 4, 2013 at 3:05 am

    Yes indeed it is a important work to do. A single mistake can prove fatal……


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