Loading and Unloading Petroleum Cargo while deballasting and ballasting

[cdrarowpn]

Hello, this is my first post:

Can anyone help or have some ideas on how to safely unload and deballast my motor barge carrying white petroleum cargo?

Any ideas would be appreciated.

[Ari]

You need to have a team to study the Job Hazard Analysis and come out with loading -unloading procedure that suit your needs.

[cdrarowpn]

Thanks for the reply. My situation is that i wanted to unload and ballast or load and deballast at the same time. I wanted to know if you have ideas on doing it safely while maintaining the stabilty of the double hull double bottom motorized barge. Has anyone done this?

[Ari]

Originally Posted by cdrarowpn

Thanks for the reply. My situation is that i wanted to unload and ballast or load and deballast at the same time. I wanted to know if you have ideas on doing it safely while maintaining the stabilty of the double hull double bottom motorized barge. Has anyone done this?

This procedure is quite complicated, it is tailored made for each individual vessel.Oil tanking barge are built with ballast tank to handle this issue.Get a chief mate or a captain who are used to this to access you situation and the way forward.

[safewalrus]

Long time since I did this but..... On tankers the cargo is usually carried in the same tanks as are used for ballast, you take one kind of liquid out and put another in! (petroleum/seawater/petroleum etc). You may use different pumps and pipelines for ballast and cargo but as you use the same tanks you have a problem mixing petroleum and water, or more to the point keeping them seperate. If you used different tanks you would of course use different pumping systems but that is really complicating matters. Incidentally one of the reasons that all cargo is emptied first before ballasting is that you get all the petroleum into one end of the tank which makes for easier stripping of the final few tons/gallons of liquid. Also of course you may not use all the cargo tanks but will wash some of them out for the next cargo - using seawater to wash with of course and putting the 'washings' ashore to be seperated presuming that you are worried about pollution (the local goverment will be, so I wouldn't ditch the washings anyway - the spell in jail my not be good for your health!)

Hope this is of some help, but I would suggest you contact a serving tanker master or mate who will be uptodate on present conditions - your next loading port maybe?

all the best

the Walrus

[Guillermo]

You should have instructions for that in your barge's 'Stability Letter', 'Stability Book' or whatever it's is called in your country. Well, unless it is not mandatory there and you carry not one aboard. If this last is the case, ask a local NA.
Cheers.

[SamSam]

http://www.globalsecurity.org/milita...7-1/CHAP4.HTML