Petrol warning...or something..or

[scumdog]

Hmm, on a moment of keeness and after seeing the thead on cleaning bike chains I went outside and cleaned my mountain-bike chain.

Did it in place on the bike, made up a gizmo to hold the tensioner forwards so the chain was nice and loose and hanging down (oo-errrr!)

Used some petrol and a stainless tub and paint-brush to bo the cleaning, it may have been Ultimate I was using having drained it from the hot-rod.

ANYWAY about 15-20 minutes after starting the job I noticed the plastic 'doofer' that screws to the outside of the biggest front sprocket (there to stop my flared strides a-tangling in the chain I suspect) had a split in it, went to re-position it and it cracked and came away at each of the five equidistant mounting point.

Ended up ripping it off, it seemed fragile and crumbly.

Then I unscrewed the 5 screws that had been holding it on, the boss's that they screwed into (ie what was left of the 'doofer') all just crumbled in my hand...
Moral of story: Don't trust modern gasoline on items of plastic that weren't designed to be petrol-compatible.:(

[tri boy]

Bugga!
Guess you will have to ride the penny farthing you southern gents still get around on.:dodge:

[Patch]

Just in case you forgot where you left it - its next to the horse an cart.




you should really use degreaser not petroleum. :wacko:

[Rhino]

Hmm, on a moment of keeness and after seeing the thead on cleaning bike chains I went outside and cleaned my mountain-bike chain.

Did it in place on the bike, made up a gizmo to hold the tensioner forwards so the chain was nice and loose and hanging down (oo-errrr!)

Used some petrol and a stainless tub and paint-brush to bo the cleaning, it may have been Ultimate I was using having drained it from the hot-rod.

ANYWAY about 15-20 minutes after starting the job I noticed the plastic 'doofer' that screws to the outside of the biggest front sprocket (there to stop my flared strides a-tangling in the chain I suspect) had a split in it, went to re-position it and it cracked and came away at each of the five equidistant mounting point.(
Damn, not good. I just had a vision of you in paisley flares on a pushie. You may have to buy a Raleigh Chopper. :)

Some modern plastics don't cope with petrol, particularly racing fuel or avgas :(

Many thanks for the hospitality to ScorpyGirl and I earlier in the year. If you and CB get up to Dorkland, you are more than welcome to stay.

[Big Dave]

*I* would bath in WD40.

[scumdog]

*I* would bath in WD40.

Sadly you are right.

But I had more petrol than WD40 so.....

[Headbanger]

*I* would bath in WD40.

I bet getting out of the bath is a hard case.....

[Headbanger]

Moral of the story, Don't touch it until it breaks, Then throw the entire contraption away and buy a new one.

Maintenance is bad.

[Cruisin' Craig]

Well that sucks.

I remember using a toothbrush and petrol to clean a bicycle chain years ago. The toothbrush literally lasted about 30 seconds before it started turning into goop.

A valid warning I think.

[Big Dave]

Remember the fractional distillation tower.
You've been feeding it from down it's own food chain.
Banjos.

[Cruisin' Craig]

Remember the fractional distillation tower.
You've been feeding it from down it's own food chain.
Banjos.

I don't think I understand. :blank:

[jrandom]

I don't think I understand. :blank:

What do you think plastic is made from?

[Cruisin' Craig]

What do you think plastic is made from?

Carbon polymer type, er... stuff?

[Big Dave]

I don't think I understand. :blank:
It was maybe a poly ethylene.

http://www.factmonster.com/ce6/sci/A0817790.html

[jrandom]

It was maybe a poly ethylene.

Mmyes.

Poly wanna cracker (http://en.wikipedia.org/wiki/Cracking_(chemistry)).

[Cruisin' Craig]

It was maybe a poly ethylene.

http://www.factmonster.com/ce6/sci/A0817790.html

I hope I'm not being dense here.

I get that fractional distillation is used to separate ethylene from petroleum like your link says.
And I get that ethylene is used to make polyethylene, which I gather is just lots of ethylene molecules all joined up.
And I get that cracking is the process of breaking up big long polymer chains into little itty bitty molecules, like Jrandom's link says. Sort of.
And I get that somehow putting this polyethylene toothbrush into petrol must be getting this cracking thing to occur.

But I still don't really get what you mean by feeding it down its own food chain.

[Winston001]

I don't think I understand. :blank:

Yes he was a bit obtuse... :D

Dave is pointing out that petrol and plastic are pretty closely linked and when they get together, unless there are bonds preventing it, they mix. Dissolve.

You grab a gollup of heavy oil out of the ground, its so thick depending on where you get it, it needs heated pipes to move it. That's because one of the many constituents of oil is black tar.

This also explains why "light" oils sell at a higher per barrel price eg. Brent Crude is good, West Texas Intermediate a bit heavier but good too.

The oil then goes to a "cracker" which is a distillation tower in a refinery. The oil is heated and breaks down into various types of hydrocarbons which are distilled off.

The type of oil, its sulpher content, and the type of catalyst used determines the final percentages of product. Suffice to say that a barrel of oil does not equal a barrel of petrol - more like half. Here is a breakdown.

<link rel="File-List" href="file:///C:%5CDOCUME%7E1%5CADMINI%7E1%5CLOCALS%7E1%5CTemp%5 Cmsohtml1%5C01%5Cclip_filelist.xml"><link rel="Edit-Time-Data" href="file:///C:%5CDOCUME%7E1%5CADMINI%7E1%5CLOCALS%7E1%5CTemp%5 Cmsohtml1%5C01%5Cclip_editdata.mso"><!--[if !mso]> <style> v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} </style> <![endif]--><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><style> <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} span.EmailStyle15 {mso-style-type:personal; mso-style-noshow:yes; mso-ansi-font-size:14.0pt; mso-bidi-font-size:14.0pt; font-family:Arial; mso-ascii-font-family:Arial; mso-hansi-font-family:Arial; mso-bidi-font-family:Arial; color:windowtext; font-weight:normal; font-style:normal; text-decoration:none; text-underline:none; text-decoration:none; text-line-through:none;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> </style><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1031"/> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]-->47% gasoline for use in automobiles

23% heating oil and diesel fuel

18% other products, which includes petrochemical feedstock—products derived from petroleum principally for the manufacturing of chemicals, synthetic rubber and plastics

10% jet fuel

4% propane

3% asphalt

<table width="98%" align="center" border="0" cellpadding="3" cellspacing="0"><tbody><tr></tr><tr> <td class="report_summary" width="99%">
</td></tr><tr><td valign="top" width="5" align="center">
</td><td class="report_summary" width="99%">
</td></tr><tr><td valign="top" width="5" align="center">
</td><td class="report_summary" width="99%">
</td></tr><tr><td valign="top" width="5" align="center">
</td><td class="report_summary" width="99%">
</td></tr><tr><td valign="top" align="center">
</td><td class="report_summary">
</td></tr><tr><td valign="top" align="center">
</td><td class="report_summary">
</td></tr></tbody></table>

[Big Dave]

I hope I'm not being dense here.



Nope. Badly transmitted data this end.
Wot Winston said.

[Kornholio]

so could my bike run on plastic then??:mellow:

[scumdog]

so could my bike run on plastic then??:mellow:


No, but since your bike is mainly made of plastic you might not be able to tell the bike from the fuel...

[Kornholio]

No, but since your bike is mainly made of plastic you might not be able to tell the bike from the fuel...

The fuel tank is actually the bike... actually :blink:

[scumdog]

The fuel tank is actually the bike... actually :blink:

So... it will end up devouring itself??:crazy:

[Big Dave]

So... it will end up devouring itself??:crazy:


<table align="center" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td align="left">Horace
Much to his Mum and Dad's dismay
Horace ate himself one day.
He didn't stop to say his grace,
He just sat down and ate his face.
"We can't have this his Dad declared,
"If that lad's ate, he should be shared."
But even as he spoke they saw
Horace eating more and more:
First his legs and then his thighs,
His arms, his nose, his hair, his eyes...
"Stop him someone!" Mother cried
"Those eyeballs would be better fried!"
But all too late, for they were gone,
And he had started on his dong...
"Oh! foolish child!" the father mourns
"You could have deep-fried that with prawns,
Some parsley and some tartar sauce..."
But H. was on his second course:
His liver and his lights and lung,
His ears, his neck, his chin, his tongue;
"To think I raised him from the cot
And now he's going to scoff the lot!"
His Mother cried: "What shall we do?
What's left won't even make a stew..."
And as she wept, her son was seen
To eat his head, his heart, his spleen.
And there he lay: a boy no more,
Just a stomach, on the floor...
None the less, since it was his
They ate it – that's what haggis is.
</td> </tr> </tbody></table>

[JMemonic]

From this link http://www.factmonster.com/ce6/sci/A0817790.html


Ethylene is colorless, has a faint odor, and has a slightly sweet taste

All I want to know is who actually goes around tasting this stuff ?:drinkup::crazy::eek5::sick:

[Cruisin' Craig]

<table align="center" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td align="left">Horace
Much to his Mum and Dad's dismay
Horace ate himself one day......


</td> </tr> </tbody></table>

Is it just me that finds that whole rhyme a little disturbing??

[BIHB@0610]

Is it just me that finds that whole rhyme a little disturbing??

Um ....... yep, sure I do ....... :whistle:

[speedpro]

Pump gas will eat most plastic and pretty quickly because a major part of it is an industrial solvent called either Toluol or Toluene. Av gas either has none or very little and doesn't cause the same problem and so is good for cleaning stuff and not dissolving it.

[MIXONE]

You clean your mountain bike?I just ride mine until it falls to bits then steal another one.

[MXNUT]

yes he was a bit obtuse... :d

dave is pointing out that petrol and plastic are pretty closely linked and when they get together, unless there are bonds preventing it, they mix. Dissolve.

You grab a gollup of heavy oil out of the ground, its so thick depending on where you get it, it needs heated pipes to move it. That's because one of the many constituents of oil is black tar.

This also explains why "light" oils sell at a higher per barrel price eg. Brent crude is good, west texas intermediate a bit heavier but good too.

The oil then goes to a "cracker" which is a distillation tower in a refinery. The oil is heated and breaks down into various types of hydrocarbons which are distilled off.

The type of oil, its sulpher content, and the type of catalyst used determines the final percentages of product. Suffice to say that a barrel of oil does not equal a barrel of petrol - more like half. Here is a breakdown.

<link rel="file-list" href="file:///c:%5cdocume%7e1%5cadmini%7e1%5clocals%7e1%5ctemp%5 cmsohtml1%5c01%5cclip_filelist.xml"><link rel="edit-time-data" href="file:///c:%5cdocume%7e1%5cadmini%7e1%5clocals%7e1%5ctemp%5 cmsohtml1%5c01%5cclip_editdata.mso"><!--[if !mso]> <style> v\:* {behavior:url(#default#vml);} o\:* {behavior:url(#default#vml);} w\:* {behavior:url(#default#vml);} .shape {behavior:url(#default#vml);} </style> <![endif]--><!--[if gte mso 9]><xml> <w:worddocument> <w:view>normal</w:view> <w:zoom>0</w:zoom> <w:punctuationkerning/> <w:validateagainstschemas/> <w:saveifxmlinvalid>false</w:saveifxmlinvalid> <w:ignoremixedcontent>false</w:ignoremixedcontent> <w:alwaysshowplaceholdertext>false</w:alwaysshowplaceholdertext> <w:compatibility> <w:breakwrappedtables/> <w:snaptogridincell/> <w:wraptextwithpunct/> <w:useasianbreakrules/> <w:dontgrowautofit/> </w:compatibility> <w:browserlevel>microsoftinternetexplorer4</w:browserlevel> </w:worddocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:latentstyles deflockedstate="false" latentstylecount="156"> </w:latentstyles> </xml><![endif]--><style> <!-- /* style definitions */ p.msonormal, li.msonormal, div.msonormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"times new roman"; mso-fareast-font-family:"times new roman";} span.emailstyle15 {mso-style-type:personal; mso-style-noshow:yes; mso-ansi-font-size:14.0pt; mso-bidi-font-size:14.0pt; font-family:arial; mso-ascii-font-family:arial; mso-hansi-font-family:arial; mso-bidi-font-family:arial; color:windowtext; font-weight:normal; font-style:normal; text-decoration:none; text-underline:none; text-decoration:none; text-line-through:none;} @page section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.section1 {page:section1;} --> </style><!--[if gte mso 10]> <style> /* style definitions */ table.msonormaltable {mso-style-name:"table normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"times new roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1031"/> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]-->47% gasoline for use in automobiles

23% heating oil and diesel fuel

18% other products, which includes petrochemical feedstock—products derived from petroleum principally for the manufacturing of chemicals, synthetic rubber and plastics

10% jet fuel

4% propane

3% asphalt

<table width="98%" align="center" border="0" cellpadding="3" cellspacing="0"><tbody><tr></tr><tr> <td class="report_summary" width="99%">
</td></tr><tr><td valign="top" width="5" align="center">
</td><td class="report_summary" width="99%">
</td></tr><tr><td valign="top" width="5" align="center">
</td><td class="report_summary" width="99%">
</td></tr><tr><td valign="top" width="5" align="center">
</td><td class="report_summary" width="99%">
</td></tr><tr><td valign="top" align="center">
</td><td class="report_summary">
</td></tr><tr><td valign="top" align="center">
</td><td class="report_summary">
</td></tr></tbody></table>
here endeth the lesson

[munterk6]

I dont understand. :clap:

[MIXONE]

here endeth the lesson

And don't forget there will be a test next week!

[Winston001]

Got a kind bling on this thread so for anyone who would like to read a bit more on cracking, this link is reasonably easy to read. http://www.theoildrum.com/story/2006/3/26/125439/544

There is also napthylene produced and sulpur (probably miniscule) but these don't seem to be mentioned.