Re: ICCP of the Hydrocarbon Line

From: <sanjib>
Date: Tue Feb 12 2008 - 09:48:00 EST

Dear Arif,

   If a recommendation is made by Specialist there must be some reason.In Oil & Gas business it is mandatory to go back to the Originator of such recommendation before taking any decision to the Contrary on hearsay,

   Having said that,we have not come across such requirement in many Oil & Gas pipelines commissioned so far.

   I hope in the Isolating joints you have installed surge diverters and earthed the line properly as per ICCP design.The velocity of Pigging for filling inert gas &C4+ Gas in is correctly selected so as not to cause Statics generation any where.

   There is no harm to switch-off the ICCP but on switching Charging time is involved.

   Best wishes,

   Sanjib Basu

Arif Javed <ajaved@qchem.com.qa> wrote:

           Gents we are about to commission C4+ (hydrocarbon) pipeline. This line is protected by ICCP. The commissioning procedure says that we have to either switch off or disconnect ICCP (impressed current cathodic protection) before commissioning. After the line is commissioned we again switch on the ICCP system.

Different people have different views on this. Some say that it is mandatory and some say they never heard of this and it is not required at all. What the group says about this?

Regards

A J

Lead Design Engineer

DES/Technical Dept

........best is NOT good enough! (aj)

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[Non-text portions of this message have been removed] Received on Tue Feb 12 09:48:00 2008