Anhydrous Hydrochloric Acid Piping

[Mech85]

Hi,
I am looking for some recommendations and/or a piping standard for anhydrous hydrochloric acid? Typical concentrations are 32%w/w and dilute at 3 to 5%w/w. One piece of information recommends glass lined or rubber lined steel pipe. I am also interested in whether anyone has experience with PTFE lined pipe for HCL acid lines.

 

[Eltron]

I have used PTFE for HCL uses without any problems. Our stuff is usually relatively small-scale, so cost may become an issue if you're talking about building an entire plant. PVC is rated as an "A" to 40% to 140°F. Polypropylene gets an "A" to 100% to 70°F. HDPE gets an "A" to 100% to 140°F, but PTFE is good to higher temps than all of those.

Hope that helps.

 

[mjeglic]

HCl is one of the most common applications for PTFE lined pipe. PVDF or even PP lined may be more economical, but use depends upon max temperature.
Take a look at

http://www.resistoflex.com

for more info on plastic lined pipe