Sulphuric acid piping
Sulphuric acid piping
(OP)
Does any body can help me in choosing the material of a sulphuric acid service?
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RE: Sulphuric acid piping
I took this from http
I hope it helps.
Sulphuric acid
Piping to the process should be of schedule 80 carbon steel, or schedule 40, 316-stainless steel with slip on welded flanges.
Piping should be sized for an acid velocity of 3.5 feet/second or lower to minimize the erosive effects of the acid.
Care should be taken at both the design and operation stages to avoid liquid full sections of pipe between closed valves since the hydrogen produced by steel corrosion can cause dangerous pressures especially in warmer weather.
Quarter turn plug valves have been found to give good service with sulphuric acid.
The recommended type should have a flanged end ductile iron body with an alloy 20 plug or Teflon encapsulated plug and a Teflon lining.
Gasket material should be Teflon.
pipingdesigner
www.pipingdesigners.com
RE: Sulphuric acid piping
good infor.
I passed to my colleague and hope it would help
I will come back to you once I get feedback from my colleague
Thank you
RE: Sulphuric acid piping
I'd be careful using carbon steel. If you do so, note that the Sch 80 piping suggested above is a corrosion allowance and you will lose material every year.
The conservative (but expensive) route is Alloy 20.
Good luck
RE: Sulphuric acid piping
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: Sulphuric acid piping
RE: Sulphuric acid piping
RE: Sulphuric acid piping
water is not an impurity in but am surpised that you are trucking 90%
RE: Sulphuric acid piping
I asked him about it and told me this purity level!
Once I get feedback from him, I will let you know.
Regards
RE: Sulphuric acid piping
RE: Sulphuric acid piping
Ken Shumway
Ford, Bacon and Davis, LLC
RE: Sulphuric acid piping
This guide is pretty comprehensive and may help..
http://www.resistoflex.com/chooseliner.asp
FYI, HCl & H2SO4 are the most common applications for plastic lined pipe
RE: Sulphuric acid piping
I recall a case where the acid mixing station for the demineralizer had to be replaced after about 2 years of operation due to an eroded hole in a 1x2 reducer. The replacement piping only lasted 2 weeks! The welds were eaten away.
It turned out the initial piping was Alloy 20 and the replacement was 316SS.
Donald Blachly, PE
RE: Sulphuric acid piping
See:
http://www
h
http://www.acidpiping.com/
and, an excellent reference:
http://www.genchemcorp.com/pdf/tsr5078.pdf
hacksaw.....
The 98% is a common commercial grade, and is one of the chemicals most widely used in industry. It is shipped by tanker and truck all over the USA
Come back with your final system design
MJC
RE: Sulphuric acid piping
the original query called out the acid conc, I only questioned its reasonableness