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trdark
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Join Date: Apr 2017
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A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/01/2017 4:15 AM

Hi Everyone,

I need to select a suitable pressure gauge for Hydrogen Peroxide (%50) line. Its material will be 316 / 316L SS. Can you help me to determine which kind of pressure gauge can be used on the line(With liquid or without liquit).
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Crabtree
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#1

Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/01/2017 5:19 AM

Yes. See those telephone numbers published by pressure gauge manufacturers on their web pages, Mildred? If those numbers were to be entered into a telephone keypad, someone at the other end will provide all the help and answer all the questions one could possibly ask. Highly recommended.

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Whitephone
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#2

Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/01/2017 5:23 AM

CAUTION: One liter of 50% hydrogen peroxide yields approximately 200 liters of oxygen and additional volumes of steam.

Although pure hydrogen peroxide is very stable, many contaminants, even in very minute amounts, can catalyze its decomposition. Most standard peroxide grades are protected from excessive decomposition by the addition of stabilizers that control the effects of incidental metallic ion contaminants. Nevertheless, hydrogen peroxide solutions do decompose at a very slow rate under normal conditions and prolonged storage. Hydrogen peroxide becomes unstable when heated or contaminated with heavy metals, such as iron, lead, manganese, cobalt, copper and its alloys, reducing agents, rust, dirt, or organic materials. It is not compatible with cyanides, hexavalent chromium compounds, nitric acid, and potassium permanganate.

Liquid pressure gauges should contain chlorotrifluoroethylene lubricating oil, similar specialty fluorinated lubricating oils, or similar inert liquids only. Silicone, mineral oils, and most other fluids are to be avoided. Bourdon tubes, with “dead ends,” should also be avoided.

https://www.fpl.fs.fed.us/documnts/pdf2010/fpl_2010_anderson001.pdf
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#5
In reply to #2

Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/01/2017 5:45 PM

1 liter of 60% h2o2 would yield 200 liters of o2.

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Brave Sir Robin
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#6
In reply to #5

Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/01/2017 6:12 PM

All depends. Is this at STP?

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#7
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Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/01/2017 6:29 PM

Yes.

Good point.

The gasses might need to reshape some containers to reach stp as expedient lyrics as desired, so it might not be right away.

Anyway, at stp, 1 liter of 50% h2o2 should yield a little less than 170 liters of o2.

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Codemaster
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#8
In reply to #2

Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/02/2017 2:41 PM

I'd add to that, speaking from memory of using the stuff some years ago in drinking water treatment - stainless steel has to be polished. We did that with SS tank internals, can't remember how we handled SS pipework. And if ball valves are used, the ball must be drilled so a volume of liquid can't be trapped.

Hopefully the OP knows this

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JE in Chicago
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#3

Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/01/2017 8:55 AM

A very clean one in conjunction with an over-pressure valve.

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Brave Sir Robin
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#4

Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/01/2017 12:59 PM

Start by paying very close attention to Whitephone's post above.

My preference would be for a pressure transducer that is easily cleaned versus a traditional bourdon tube type of gauge.

http://www.globalspec.com/search/products?page=gs#sqid=20529154&query=316%20pressure%20transducer

Here is one from Setra Sensing Solutions

http://www.setra.com/products/pressure/model-217-ultra-high-purity-pressure-transducer

I found this using the Globalspec search tool in less than 2 minutes.

Or this . . .

https://www.coleparmer.com/i/mn/6807454

Or this from Omega

http://www.globalspec.com/pdf/viewpdf?partId={A173DEC4-F09F-4C8D-9DB6-A9605D43716A}&vid=99786&comp=2&from=detail

Or this . . . .

http://www.globalspec.com/specsearch/partspecs?partId={78672C3B-EB2A-4C6F-884C-F144498F3149}&comp=2&vid=93060&srchwebhitid=656195189&srchitem=1&sqid=20528482

These are just a few that you can choose from using Globalspec's search engine. Of course it is TOTALLY UP TO YOU to choose the right component for your job and you are entirely responsible for that choice. My name isn't going to be on that drawing. Yours is.

Good luck with your quest.
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Carl_E
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#9

Re: A Pressure Gauge Selection for Hydrogen Peroxide (P) line

04/04/2017 9:49 PM

>Liquid pressure gauges should contain chlorotrifluoroethylene lubricating oil

That's a ten dollar word for the commercial product called Halocarbon, by those in the biz.

Any professional gauge vendor will have 316L wetted parts and halocarbon fill fluid. You could even put a 316L seal on it (if the pressure is over 7 bar.
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Brave Sir Robin (2); Carl_E (1); Codemaster (1); Crabtree (1); JE in Chicago (1); truth is not a compromise (2); Whitephone (1)

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