Natural Gas Loss Due To Damage
Natural Gas Loss Due To Damage
(OP)
We have had a recent increase in the number of incidents involving damage to our gas line. Our ordinances allow us to charge negligent individuals for the gas losses, labor, parts and other incidentals. Up to now most of them were in the ballpark of about 5 to 20 Mcf. Now we have a situation involving a severed riser. The stats are , 25 psi main, 200' of 3/4" steel pipe service line from the tap and 26 hours of blowing gas. I am using the gas loss section in GasCalc 4.0 to calculate the total volume of gas lost. My problem is that when I try to use one of the following standard equations: IGT-improved, Panhandle, Weymouth, Spitzglass I get a significant variance on the flow rate. Can someone please advise which one should be used and why.





RE: Natural Gas Loss Due To Damage
"I think it would be a good idea."
- Mahatma Gandhi (1869-1948),
when asked about Western civilization
RE: Natural Gas Loss Due To Damage
RE: Natural Gas Loss Due To Damage
With a severed supply line, I believe that you may have "choked flow" conditions..???
What is the supply pressure ?
If you have choked flow, then the "standard equations: IGT-improved, Panhandle, Weymouth, Spitzglass probably do not apply..
Back to the engineering "Koran" for this case....Crane Techinical Paper #410
My opinion only
-MJC
RE: Natural Gas Loss Due To Damage
Good luck,
Latexman
RE: Natural Gas Loss Due To Damage
Regards,
athomas236
RE: Natural Gas Loss Due To Damage
Don Phillips
http://worthingtonengineering.com
RE: Natural Gas Loss Due To Damage
Good luck,
Latexman
RE: Natural Gas Loss Due To Damage
The court would then decide on what if anything should be paid not the experts. Thats my experience anyway.
Regards,
athomas236
RE: Natural Gas Loss Due To Damage
If you were plowing a field, which would you rather use? Two strong oxen or 1024 chickens?" - Seymour Cray (1925-1996), father of supercomputing
***************
http://virtualpipeline.spaces.live.com/
RE: Natural Gas Loss Due To Damage
Interestingly, if I was the latest culprit and you tried to stick me with a bill I might be prepared to challenge that because of the past history and frequency of such events that it is arguable that there is some negligence on behalf of the owner in its location and protection.
Of course, I don't know the circumstances and maybe you have taken all reasonable care e.g. buried it deep and put in armoured pipes, and maybe someone hasn't checked the plans before digging up the road yet again or something.
JMW
www.ViscoAnalyser.com