Talk:Pigging

message: Is it me, or is the section on interlocks unlike most other wikipedia articles (IE internal references and/or citations), with it's excessive sales-pitch references to netherlocks who are clearly just trying to sell/garner PR on their product rather than actually contributing. Where is the evidence that, to back up the claim, which I quote "valve interlocks, which is nowadays adopted by all global oil and gas operating companies." - what, *all* of them? Even the small ones? The article is also not a stand-alone editable section, given the header, pigbacking on the "Safety considerations". Could someone well versed in wikipedia editing clean up the excessive - and unhelpful (linking to a page that says "Netherlocks has developed process interlocking solutions for various applications such as pressure relief valves" does not tell me how they work or what they look like - a sales pitch, rather than learning) external links in this section? Thanks. 80.43.238.201 (talk) 01:45, 7 March 2015 (UTC)
thread_title:  Netherlocks/Interlocks cleanup 

message: Pigging is a standard required practice for cleaning pipes. Inspection gauges are different and distinct from pigging. It might make more sense to link inspection gauge as a part of smart pigging as these are used to determine dents in pipelines. KB  —Preceding unsigned comment added by 142.59.143.221 (talk) 14:10, 10 April 2008 (UTC)
replies: text: Merger is completed. However, it needs expert attention and extensive cleanup. Beagel (talk) 08:01, 15 August 2009 (UTC)
thread_title: Merger with [[Pipeline inspection gauge]]

message: What is the evidence that the etymology of the word "pig" is "Pigs get their name from the squealing sound they make while traveling through a pipeline."? Mrmcgibby 21:50, 25 July 2005 (UTC)
replies: text: I didn't add it to the article, but I heard that's where the name comes from on a Modern Marvels episode on the History Channel. I don't know if their source was reliable. However, this pigging company also relates the story. I've also found sources that say the original pigs squealed. I'll add it back in and if anyone objects, they can remove it and say why here. -- Kjkolb 03:03, 13 December 2005 (UTC)
replies: text: Please cite whatever reliable reference you can find before putting it back.  I've removed it for now. Mrmcgibby 20:04, 16 December 2005 (UTC)
replies: text: Here's a cite from a magazine. -- Kjkolb 04:00, 18 December 2005 (UTC)
thread_title: Etymology of "pig"

message: You say that the pig doesn't interupt production flow. I am afraid that this is not the case! Production flow must be stopped for the pigging run to take place. A slug of fluid is fired behind the pig to push it along but there is no production whilst this is being done. Just thought I'd clear that up.
:I'm afraid you're simply wrong.  Perhaps this is true for the pigging runs that you've done, but 99% of the runs we do are done in the pipeline product. Mrmcgibby 20:04, 16 December 2005 (UTC)
replies: text: I just did ask a major operator.  They're quite confused by your statement.  Are you talking about a specific type of pigging?  We do inline inspection of oil, gas, and other lines and most of our runs are done with production flow in the line.  That is to say, the product in the line is being used for whatever purpose it would normally be used for when the line is not being pigged.  Perhaps we differ on the definition of "production flow"? Mrmcgibby 19:22, 6 January 2006 (UTC)
thread_title:  Interupting flow? 

message: There has been work done in the past that used capacitive sensor technology to detect defects in polyethylene pipes for natural gas that can be added and should help the article more. Most of the topics talks about magnetic flux which is more for metal pipe, but very little in the article talks about any plastic pipeline. This test was conducted by NETL a DOE entity.
Website containing the article.
http://www.netl.doe.gov/technologies/oil-gas/publications/td/dtrs56-benchmark_report_final.pdf
Pages in reference are C35 (PDF Page starting at 185)--Guilio 2008 (talk) 12:23, 8 April 2010 (UTC)
thread_title:  New work 

message: The article says pigs don't work with butterfly valves but do work with ball valves. What about gate valves? 
When fully open, it appears a gate valve should not block the flow path, though the gate guide channels might cause pig snagging, and also the guide channels apparently can't be cleaned by a pig. (?)
DMahalko (talk) 04:52, 2 January 2011 (UTC)
thread_title:  Gate valves? 

message: Don't you think it is appropriate to add a detailed description of each type of pigs are required here? Kir360 (talk) 17:19, 8 February 2012 (UTC)
thread_title:  About Types of Pigs 

message: I added a blurb about the "flying pig" incident in Grand Prairie, TX, in October 2010. Pipelineexaminer (talk)  —Preceding undated comment added 01:28, 10 June 2012 (UTC)
thread_title:  Safety Considerations 

message: So, bent pipes are typically not uniformly circular but slightly oval in shape, and the non-circularity can get really severe in tightly bent pipe.
Also a pig -MUST- be more than a simple flat disc for it to stay concentric in the pipe. It must apparently use two discs connected with a rod, or at least a disc with a long rod sticking out of center of the disc.
Either case appears to limit the pipe bend radius, to be very large and sweeping for a pig to:
* seal itself around the non-circular deformed pipe wall in the bend
* not jam the rod-body of the pig against the walls in the bend, between the disc-ends of the pig.
DMahalko (talk) 06:18, 10 February 2012 (UTC)
replies: text: A proper pipeline bend/curve is circular in cross section, not oval. But there are lots of 'non-proper' bends out there.... The pig I worked with (smart pigs) used disks connected by spacers. The spacers were the electronics and such. The diameter of the spacers were smaller than the diameters of the disks. The diameters of the disks, spacers and the length between them determines the minimum radius that the pig can traverse. In very small diameter pigs, the electronics must be spread out along several sections due to space limitations. Each section has a swivel joint to allow further bending of the entire tool. The largest tools are usually in 2 sections, 1 for the sensors and electronics, the other for the batteries. Ken (talk) 14:42, 24 September 2013 (UTC)
thread_title:  Bent pipe shape distortion, and minimum bend radius to prevent leakage or pig jamming? 

message: Might be worth stating that the alternative names (especially when working with muslim clients) for pigging and PIG are scraping and scraper Naindj (talk) 16:37, 19 June 2012 (UTC)
thread_title:  Scraping / scrapers 

message: Back in the 1970's the milking systems on dairy farms used sponge pigs to clean out the pipe work after each milking session (typically twice a day).  I'm not sure if this is the case these days or if other means have been developed.
Idyllic press (talk) 23:49, 30 April 2016 (UTC)
thread_title:  Dairy farms