Previous in Forum: Artificial Atmosphere In Vacuum   Next in Forum: Nickel Base Super Alloys
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
7 comments
Rate Comments: Nested
Anonymous Poster #1

Natural Gas Loss from a Purge

12/16/2014 8:20 PM

I know the size of the opening (4" diameter) and the pressure (5 psi) of a purged pipeline. Is there a way to figure out the flowrate (e.g., cubic feet/min) of the gas lost (this is not a full purge of a pipe, only a controlled release)?

Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
tcmtech
Guru

Join Date: Jun 2009
Location: South of Minot North Dakota
Posts: 8376
Good Answers: 775
#1

Re: Natural Gas Loss from a Purge

12/16/2014 8:31 PM

Yep but anonymous posters are not real forum members with real problems so I can not give one any workable info.

Get used to it.

Reply
DG Dave
Participant

Join Date: Dec 2014
Posts: 2
#2
In reply to #1

Re: Natural Gas Loss from a Purge

12/16/2014 8:36 PM

OK. Chalk it up to me being a newbie. My name is revealed now.
Reply
James Stewart
Guru
Safety - Hazmat - New Member United States - US - Statue of Liberty - New Member Engineering Fields - Chemical Engineering - Old Hand

Join Date: Mar 2011
Location: Lubbock, Texas
Posts: 14331
Good Answers: 162
#7
In reply to #2

Re: Natural Gas Loss from a Purge

12/18/2014 2:27 PM

You did not mention how long the 4" opening is open....Flow rate is one thing, flow total is something entirely different.

Also, the answer(s) depend on what all is downstream of this opening, from nothing all the way to a 4" pipeline to your shop?

__________________
 If it ain't broke, don't fix it. Just build a better one.
Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#3

Re: Natural Gas Loss from a Purge

12/16/2014 10:00 PM

You're probably around 3k cfm....

__________________
 All living things seek to control their own destiny....this is the purpose of life
Reply
lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#4

Re: Natural Gas Loss from a Purge

12/16/2014 10:27 PM

"a purged pipeline". "this is not a full purge of a pipe, only a controlled release"

Maybe you don't get out much?

Merry Christmas.

Gas pipe discharge flow rate calculator

Calculator: Air Flow Rate through an Orifice | TLV

Flow measurement - Wikipedia, the free encyclopedia

Design of circular liquid or gas pipes software using Darcy ...

Choked Compressible Flow of Gas from Tank through Pipe
Reply
DG Dave
Participant

Join Date: Dec 2014
Posts: 2
#5
In reply to #4

Re: Natural Gas Loss from a Purge

12/17/2014 11:21 AM

Thanks. I do need to get out more...
Reply Off Topic (Score 4)
adreasler
Guru
Engineering Fields - Electrical Engineering - New Member Fans of Old Computers - Commodore 64 - New Member Popular Science - Evolution - New Member United States - Member - New Member

Join Date: Oct 2013
Location: Illinois, 7 county region (The 'blue dot' that drags the rest of the 'red state' around during presidential elections.)
Posts: 3683
Good Answers: 89
#6
In reply to #5

Re: Natural Gas Loss from a Purge

12/18/2014 9:15 AM

Welcome to CR4. by the way. You managed to learn the First Rule of CR4: We don't talk about Fight Clu- Oops, wrong list.

The First Rule is: anyone posting as an anon with a question that looks like a homework assignment ("Given an opening of X and a PSI of Y, what is the flow rate through the opening?") will be assumed to be a student trying to get the forum to do their homework for them, and treated appropriately.

We're a pretty friendly and helpful bunch (as long as the coffee keeps flowing), so feel free to pull up a virtual chair and chat away. For some reason, those people who just want to start arguments and generally act like poopie-heads (this is a public forum, so we do our best to avoid 'crude language') don't stick around too long.

__________________
 ( The opinions espressed in this post may not reflect the true opinions of the poster, and may not reflect commonly accepted versions of reality. ) (If you are wondering: yes, I DO hope to live to be as old as my jokes.)
Reply Off Topic (Score 4)
Reply to Forum Thread
Have a Different Question?
7 comments
Copy to Clipboard

Users who posted comments:

adreasler (1); DG Dave (2); James Stewart (1); lyn (1); SolarEagle (1); tcmtech (1)

Previous in Forum: Artificial Atmosphere In Vacuum   Next in Forum: Nickel Base Super Alloys

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Chemical & Material Science:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (46 right now)
Show Members
Advertisement