Venting NG to atmosphere Venting, atmosphere

jobstone

Hi Guys,

Have yu got any experience venting NG to atmosphere? Concerns on explosion, safety, etc

Thanks

norzul

7pipet19

The only problems I've had have been losing the economic benefit of selling the gas, and the problems with Greenhouse gas limits.??Dispersion modeling shows that the explosive envelope (i.e., the volume of space that is between the Upper Explosive Limit and the Lower Explosive Limit) is really small and with any wind at all it becomes vanisingly small.

Methane does not contribute to any form of corrosion that I've ever heard of.

David

20082005

We sometimes use process gas for instrument air (instrument gas). There is a constant bleed in the I/P and controllers, but the amount is quite small.

This is mostly for existing sites. I haven't seen a new site do that lately. I would think that it is no longer allowed, with existing sites grandfathered in.

How much are you venting? "Do not worry about your problems with mathematics, I assure you mine are far greater."???
Albert Einstein
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1978pipe

I wrote an SPE paper (SPE61030)once on those venting controllers.??We had an economic benefit on ripping all of them out and replacing them with non-venting controllers.??Those things put more gas into the air than you would think.

David

1j9s9w

David, do you have a link to that paper? "Do not worry about your problems with mathematics, I assure you mine are far greater."???
Albert Einstein
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soft6dri

To all
Is there any simple means, say free software to estimate size of dispersion plume or stack?
When you have NG that has in its composition, significative proportions of ethane, propane and butanes ( say totalling 20%in addition to methane)does this affect significatively the dispersion pattern, once these components are heavier than air at atmospheric pressure?
TIA
dkf

?

4xojs

Ashereng,
You can get it from the SPE e-Library.??I have just put a version on my web site under the "Samples" tab, under Gathering System Samples it is the last entry.

dkf,
The software I used for dispersion modeling in my last job was on the order of $15k/seat.??That is as close to "free" as I've ever seen those calculations. David Simpson, PE
MuleShoe Engineering

www.muleshoe-eng.com

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geojdril

David,

Thank you very much.

I appreciate you posting it on your website. The SPE e-library charges $20USD per copy. (I'm not a member.)

I also like the other articles on your site. They are very useful. "Do not worry about your problems with mathematics, I assure you mine are far greater."???
Albert Einstein
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oq9news

David,

May I share your article? "Do not worry about your problems with mathematics, I assure you mine are far greater."???
Albert Einstein
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ansgashl

I talked to a colleague, and he mentioned that at one site, all the vents are piped/tubed to supply fuel for building gas heaters.

In this case, I guess you can call it
???constant bleed/zero emission/combustion product

"Do not worry about your problems with mathematics, I assure you mine are far greater."???
Albert Einstein
Have you read
[url=/faqs.cfm?fid=376]FAQ731-376[/url]
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