petro197

Ashereng,
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
[url=/faqs.cfm?fid=376]FAQ731-376[/url]
for tips on how to make the best use of Eng-Tips Fora.

The harder I work, the luckier I seem

softfpip

David,

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
[url=/faqs.cfm?fid=376]FAQ731-376[/url]
to make the best use of Eng-Tips Forums?

2qx1976y

Thank you for the use of your articles. I will definitely share the link to your site.

"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]
to make the best use of Eng-Tips Forums?

l23yx

Dear All,

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

1986gas1

norzul,

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
[url=/faqs.cfm?fid=376]FAQ731-376[/url]
to make the best use of Eng-Tips Forums?

drilld8p

It is pretty common to vent PSV's locally on small well sites.??Again, the dispersion calculations put the risk of explosion pretty low (you have to evaluate your particular situation, don't rely of broad generalizations).

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

4geo67ga

Many jurisdictions are moving to disallow that.

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
[url=/faqs.cfm?fid=376]FAQ731-376[/url]
to make the best use of Eng-Tips Forums?

93faao

David,

Perhaps yu need to click the respective photo to route yu to a more readable photo

try this...


http://photos1.blogger.com/blogger/6171/1348/1600/SSOV_Page_3.1.jpg


I'm sure yu can read now.

pv7ewhyg

Ashereng,

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