A Steam lance perhaps? This document I just found has some interesting
things in it.
https://law.resource.org/pub/us/cfr/ibr/003/cga.g-4.1.1985.pdf
On Mon, Jan 25, 2016 at 12:42 PM, Carl Tedesco <ctedesco@xxxxxxxxxxxxxx> wrote:
Does anyone have any advice for LOX cleaning a large tank where it may not be
practical/affordable filling it with 99% IPA? I have used a Trisodium
phosphate solution in the past.
--- Carl
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Ben Brockert
Sent: Monday, January 25, 2016 1:35 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Sourcing LOX
On Mon, Jan 25, 2016 at 4:03 PM, Wyatt Rehder <wyatt.rehder@xxxxxxxxx> wrote:
Small parts, fittings, etc. use a ultrasonic cleaner, have two trays,
one with very clean IPA one with your more dirty IPA. Glass trays
work, and just float them in the water in the cleaner. Do 5-20 min in
the dirty tray, and then another 5-20 min in the clean tray. As the
clean tray gets dirty it now is your new dirty tray and you get clean
IPA again. Dispose of the dirty IPA.
Though every single ultrasonic cleaner specifically says to not fill it with
a flammable liquid... you can just fill the ultrasonic cleaner with IPA. If
you get one of the nicer ones with a drain valve then you can just dump the
dirty IPA into a bucket directly without moving the cleaner.
The area around the metal pan full of warm agitating volatile fuel is
obviously a non-smoking area. I'd prefer it to be well ventilated rather than
inside a plastic tent.
IPA is somehow listed in the same category as the notoriously dangerous
diethyl/dimethyl ether as a danger for forming peroxides.
http://www.safety.vanderbilt.edu/chem/peroxide-forming-chemicals.php
"These chemicals can undergo explosive polymerization initiated by dissolved
oxygen. Label these items with a date of receipt and date of opening and
dispose of these items 6 months after opening or 12 months if unopened. When
alcohols listed are used for purposes that do not involve heating, chemical
reaction, bulk evaporation or other activities that may stress the
peroxidizable material, it is not necessary to track and test these
containers for peroxidation."
I have never heard of that actually happening in the real world, but be
warned. Don't try recycling your dirty IPA through distillation, I guess.
Ben
