Mike, Thanks for the info. I will let the list know how it holds up. Luke
>From: Mike McGinness <[EMAIL PROTECTED]> >Reply-To: Biofuel@sustainablelists.org >To: Biofuel@sustainablelists.org >Subject: Re: [Biofuel] Using Pex? >Date: Sat, 08 Apr 2006 01:15:05 -0500 > >Luke, > >PEX should work OK, but the life span would depend on what it is exposed >to. It >is not good for long term outdoor use as UV breaks it down after several >months >in the sun. Also, it probably won't last too long if used for straight >sodium >methoxide or high strength sodium hydroxide service, but you may get a few >months >of continuous service before it fails. I do know that 50% sodium hydroxide >breaks >it down pretty quick (a couple of months). Heat and pressure will shorten >the >life further. > >It should hold up pretty well to the WVO and biodiesel. An interesting >site, >biodiesel reactor how to page, listed below shows PEX being used for a >sight >gauge on his "processor tank". > >http://journeytoforever.org/biodiesel_processor3.html > >I also found this: > >"Joseph, Using polyethylene, cross linked pex tubing is rated for >petrochemical >use. you will have no >problems using it for svo, or biodiesel fuel and processing. It is also >rated for >pressure and >temperature,usually around 200 degress F.and 100 p.s.i. I use it in my >business >all the time. Good Luck >and keep going!! D.Streeter" > >by searching "PEX" in the lists search engine at the bottom of this page. >Here is >the link to the page quoted above: > >http://www.mail-archive.com/biofuel@sustainablelists.org/msg37063.html > >PEX is basically a crosslinked polyethylene and polyethylene is basically a >synthetic wax (chemically like wax) and is pretty resistant to many >chemicals and >solvents just like wax, but it is no where near as good as teflon or kynar >for >the straight sodium methoxide, sodium hydroxide. Also the standard 55 >gallon >plastic drums are made of HDPE (High Density PolyEthylene) which is what >some of >the PEX tubings are made out of (HDPE). Here is a site with some info on >PEX, >but I could not find an online chemical resistance chart for it. > >http://www.ppfahome.org/pex/faqpex.html > >Also, Nylon is probably even better than PEX. > >-Mike McGinness > >WM LUKE MATHISEN wrote: > > > I have some PEX tubing left over from plumbing our house, any one with > > experience using PEX to build a processor? Will the lye react to it? I >am > > thinking of using it to heat the processor from our tankless waterheater > > which we use to heat the floor, as well as for mixing. Also will a >washing > > machine water pump work? > > > > Luke > > > > _______________________________________________ > > Biofuel mailing list > > Biofuel@sustainablelists.org > > >http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Search the combined Biofuel and Biofuels-biz list archives (50,000 >messages): > > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > >_______________________________________________ >Biofuel mailing list >Biofuel@sustainablelists.org >http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > >Biofuel at Journey to Forever: >http://journeytoforever.org/biofuel.html > >Search the combined Biofuel and Biofuels-biz list archives (50,000 >messages): >http://www.mail-archive.com/biofuel@sustainablelists.org/ > _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
