2 replies to this topic

[neel_avi]

Dear Experts,

 

In case of a natural gas pipeline leak or rupture, the damaged segment is isolated by means of isolation valves and the gas is vented in order to evacuate the section.

 

A 36" diameter and 32 kilometer long pipeline segment has an inventory of roughly 2.0 million std m3, a huge loss finanially as well as an environmental hazard. Without venting, for a moderate leak (for a 2 inch dia leak)  the entire line gets depressurised in ~50 hrs. Manned stations are provided strategially at every 3-4 hrs travel distance along the pipeline.

 

Thus even if a team reaches the sectionalising valve stations which isolates the leaking line within 5 hrs the pipeline would still contain sufficient gas. I would be glad to receive some suggestions on available technologies like Carbon bed Adsorbtion, or mobile compressor units to recover the balance gas. For an instance if I can imagine that we could bring in mobile compressors which have to work under variable suction pressures (may be consecutive cut-ins of compressors at different pr levels). 

 

Or is it a utopian concept? I contacted a couple of compressor manufacturers and GL noble denton for their technologies. However, havent heard from them since one month even after a couple of request mails!! 

 

Any inputs like some proven technology providers, vendors or initiatives for similar services would be highly appreciated. It would help me start a feasibility report.   

 

Regards

Avijit

Edited by neel_avi, 02 May 2013 - 03:29 AM.

[Bobby Strain]

Spend your effort on eliminating leaks.

 

Bobby

[neel_avi]

Mr. Strain,

 

thanks for your advice. I should let you know that we definitely take up Inline Line Inspection/ MFL plans at definite intervals and do have regular survey teams from leak detection teams and assigned line walkers.

 

However, as you are aware 65-70% of the line ruptures or damages are caused by third party intervention. These leaks are not minor and can result into gross losses.

 

I wanted some ideas on those accidental aspects from experts who might be thinking in that line. 

 

Regards to you
 

Avijit