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#231
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Gasohol
Blueskies wrote: Thanks Dave! Can 87 octane be mixed with ~93 octane to arrive at 90 octane? Seems like a lot of black magic (no pun intended) in the oil business... That's exactly how they make the mid grade gas. |
#232
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Gasohol
("David Lesher" wrote)
Since fuel injected cars took over; IMHO 99.99% of gas is all the same, save the uniform on the attendent. Attendant? :-) http://en.wikipedia.org/wiki/Tesoro Tesoro's "fuel terminal" (in Roseville, MN) has pumps, and no building - just credit card payment boxes. It's the only place in the Twin Cities I've been able to find 87 OXY-Free. The other 'far-and-few-between' Non-OXY pumps, around town I've seen, are premium. Paul-Mont |
#233
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Gasohol
Matt Barrow wrote:
"Roger (K8RI)" wrote in message Over 20 years ago I had the chance to tour the pumping and fuel distribution control facility at a refinery. *Everything* was controlled from that room. They measured flow rates Vs time and claimed they could control the flow to the remote storage facilities hundreds of miles away within several gallons. the system was automated. The operator told it how many gallons of what to go where. Different mixes and fuels were sent through the same pipeline with no one on the other end to either make the switch or to monitor it. Were it only that the ATC system was so automatic, instead of so antiquated. And about 15 years ago, the operators at the storage facilities in Greensboro, NC were fined heavily for leaking fuels into ground water. They tried to claim they didn't know it was happening. Disk jockeys at the time were making fun of the fact that they pump would meter out gas to the hundredth of a gallon, but they couldn't keep track of the thousands that were pouring into the groundwater. 8*) Greensboro is my hometown. |
#234
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Gasohol
The operator told it how many gallons of what to go
where. Different mixes and fuels were sent through the same pipeline with no one on the other end to either make the switch or to monitor it. Is there no diffusion at the boundaries? Jose -- You can choose whom to befriend, but you cannot choose whom to love. for Email, make the obvious change in the address. |
#235
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Gasohol
Jose writes:
Is there no diffusion at the boundaries? There is some. How much is complex. It depends on what the two products are, the rate, and a big issue, is the line kept tight? By tight I mean, was it running non-stop at the same backpressure the whole time? If the line went up & down in rate because they added pumps or swung to a different tank, then there is a longer [time] or broader [linear feet of product] mix region. Some lines actually used spheres between, but they bring their own problems... For a real mess; picture a midline booster pump, only used for some products. You must keep track of what product is now in the booster station line section before you restart. No fair dumping Diesel or Kero into the gas going by.... but the opposite is OK. [Too much gas in the distillate is Not Allowed, but a bbl or 3 in a 100,000 bbl tank is no big deal.] -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
#236
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Gasohol
"David Lesher" wrote Some lines actually used spheres between, but they bring their own problems... A little further OT,... I've watched a lot of heavy #6 (needs to be heated to pump) unloaded at the offshore platform. When the tanker is empty, we pig the pipe and backfill with #2. The methods seem crude to the observer, but the results are exact enough even for the accountants. |
#237
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Gasohol
"Mike Isaksen" wrote A little further OT,... I've watched a lot of heavy #6 (needs to be heated to pump) unloaded at the offshore platform. When the tanker is empty, we pig the pipe and backfill with #2. The methods seem crude to the observer, but the results are exact enough even for the accountants. Care to explain a little more, for the unfamiliar among us? Pig the pipe? Backfill with #2? What is that? Why is it possible to be considered as crude, and why is it accurate? -- Jim in NC |
#238
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Gasohol
"Morgans" writes:
"Mike Isaksen" wrote A little further OT,... I've watched a lot of heavy #6 (needs to be heated to pump) unloaded at the offshore platform. When the tanker is empty, we pig the pipe and backfill with #2. The methods seem crude to the observer, but the results are exact enough even for the accountants. Care to explain a little more, for the unfamiliar among us? Pig the pipe? Backfill with #2? What is that? #6 Bunker is one step up from road tar. It's what's left over when you take all the good stuph out at the refinery. It's CHEAP, so BIG ships burned it. But it is virually solid when cold. So first it must be heated to pump. Remember WWII movies about "bringing another boiler on line"? They used handheld Kerosene torches to bootstrap the process; then waste steam from the boiler.. #2 is Fuel Oil; slight heavier than #1 aka Kerosene. (Diesel is #2 with added goodies.) If they left #6 in the line, they'd be SOL as it cooled. So they use thinner stuff to displace it. A pig is a scraper. You run it down a line to scrape gunk off the walls. It's pushed by the line flow. There are several types: A poly pig is a GIANT Tylonol capsule. A conventional pig is a disk [picture an old LP..] the ID of the line, with a gasket around the edge. The center hole has a shaft trailing back with wire brushes articulated from it; they're spring-loaded outward to scrape the wall. You pig the line while pushing Kero or Fuel Oil; the dirt settles into the destination tank bottom... -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
#239
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Gasohol
"David Lesher" wrote ... ..... (snipped pipeline shop talk about bunker fuel) ...... Very nice explainations David, better than I could have done on my best day! |
#240
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Gasohol
On Thu, 28 Jun 2007 23:52:36 -0400, Jose
wrote: The operator told it how many gallons of what to go where. Different mixes and fuels were sent through the same pipeline with no one on the other end to either make the switch or to monitor it. Is there no diffusion at the boundaries? I was once told that (for gasoline pipelines at least) it was the usual practice to put some low grade "slug" gasoline between runs for different merchants. The slug gas (with a bit of the mixture from either end) was then sold to the cheap "no name" gas stations. -Dana -- -- If replying by email, please make the obvious changes. ------------------------------------------------------------------------------- "I just drank what?" (Socrates) |
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