Mao is correct in some respects. A "pig" is still the common method of cleaning or checking the integrity of a pipeline, but is not commonly used to separate product. Nowadays they allow the product to mix between loads, the term describing this beig "interface". Based on characteristics like specific gravity and viscosity they can calculate the interface between products, and simply separate a given amount at the beginning/end of a transmission load. One of my customers is Panhandle Eastern Pipeline. They do primarily gas transmission line stuff, but they have a couple of short product pipelines used for petroleum products. They use pigs for cleaning the lines as well as to check them for leakage. I've seen "smart pigs" that collect data as they travel through the pipe. Dan
--- On Thu, 11/5/09, Kaleb C. Striplin <ka...@striplin.net> wrote: From: Kaleb C. Striplin <ka...@striplin.net> Subject: Re: [MBZ] OT: Gasoline for the Wal-Mart good/bad debate To: "Mercedes Discussion List" <mercedes@okiebenz.com> Date: Thursday, November 5, 2009, 7:57 PM I doubt that. The way I understand it they use water to separate what they are sending thru. Mountain Man wrote: > Mitch wrote: > >> Since it all >> comes into Michigan on the same pipeline, it's difficult to impossible to >> find real gasoline here. >> > > Once upon a time I was told that these pipelines float a "pig" down > the pipelines to separate formulations or products? Is anyone here > familiar with pipeline mechanics/practice? - Is it possible to push a > "pig" thru a pipeline and have it separate product without > contamination? > mao > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com Version: 9.0.698 / Virus Database: > 270.14.51/2482 - Release Date: 11/05/09 01:37:00 > > -- Kaleb C. Striplin/Claremore, OK 95 E300, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 350SDL, 91 300D, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 76 240D, 76 300D, http://www.okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
