Venting NG to atmosphere
Venting NG to atmosphere
(OP)
Hi Guys,
Have yu got any experience venting NG to atmosphere? Concerns on explosion, safety, etc
Thanks
norzul
Have yu got any experience venting NG to atmosphere? Concerns on explosion, safety, etc
Thanks
norzul





RE: Venting NG to atmosphere
Methane does not contribute to any form of corrosion that I've ever heard of.
David
RE: Venting NG to atmosphere
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
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
David
RE: Venting NG to atmosphere
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
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
RE: Venting NG to atmosphere
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
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
The harder I work, the luckier I seem
RE: Venting NG to atmosphere
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
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
May I share your article?
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
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 FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
You are welcome to anything that is there. The intent is to make you think "if he's giving this quality of stuff away, what do you get if you pay him?". Sometimes it works too. I'd appreciate that if you share any of the papers you do it through a link instead of just making a copy and mailing it, but I don't have any way to control that and it really isn't that big a deal either way.
Some controllers have the capability to pipe the exhaust to somewhere convenient (usually used to get the explosive gases out of a confined space), bringing them all together to run a burner really increases the risk that backpressure will keep them from working when needed. I'm uneasy even piping them outside of a building since I've had insects plug the end of the tubing on several occasions.
"Building heaters" seem to be a very intermittent load which would never be in sync with the intermittent supply from the controllers (how do you even keep your pilot running when all the controllers have stopped venting at the same time because of a process upset). I'm not saying it can't be done, but I'd be leary of doing it.
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
The harder I work, the luckier I seem
RE: Venting NG to atmosphere
We have a separate line (with regulator) that acts as a makeup to the heater. The vented gas is sucked like a venturi effect to the heaters I think?
I haven't seen it but I think/hope that's right.
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
The link below will direct yu to my blog explaining on the SSOV application...replacing the conventional relief valve. Appreciate your feedback...
http://technical2005.blogspot.com/
Thanks
norzul
RE: Venting NG to atmosphere
That link is also in your HIPPS post. Is this what you are referring to in this thread? You are venting NG via a PSV to atmosphere? If so, you probably should have mentioned that in your OP. My reply is totally off your mark.
We don't relieve to atmosphere. Typically, we pipe our PSVs to our flare. I don't believe that we relieve any HC gas to atmosphere anymore.
I would think that there is a definite concern with explosion - same as if the flare went out. Having said that, I don't have experience sending that my HC gas to atmosphere.
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
About your blog ... you need younger eyes than mine to even read it. I could tell that there were some schematics, but I couldn't see a single word that I could read.
David
RE: Venting NG to atmosphere
In sour well service, you have to flare.
In sweet well service, they are moving in that direction currently also.
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Venting NG to atmosphere
Perhaps yu need to click the respective photo to route yu to a more readable photo
try this...
http://
I'm sure yu can read now.
RE: Venting NG to atmosphere
The "small" PSV or we call it creep valve will only vent the NG to atmosphere when both SSOVs failed...refer to the safety protection features. This is for additional protection (may not be required).
norzul