[arjun]

please advice any material satisfying following specification;

operating temp 150'C
Medium  HCl 20-23%
Tensile strength- 40MPa
Flexual strength- 65Mpa
Compressive strength- 160MPa

It is for a packing follower pipe (pipe with ID around 150mm dia and 3/4th of meter length) for fluid inlet of a rotary reactor vessel.
Present one's MOC is silica fibre reinforced phenolic resin, and we are lacking suppliers for the same (haveg).
I ve gone thought of vinyl, epoxy bisphenol and other FRP substitutes, but found none operable at 150'C
alloys like hastelloy etc may works, but are way more expensive.
kindly do comment.

thanks in advance,   
Arjun

[Enthalpy]

You could try fluorinated polymers. Probably not Ptfe if the stress is permanent, but stronger ones like Efte, Pctfe. Have a look in a list of fluoropolymers, I don't have my doc here. They aren't very cheap neither.

I didn't expect phenolic to operate at 150°C HCL.

[arjun]

You could try fluorinated polymers. Probably not Ptfe if the stress is permanent, but stronger ones like Efte, Pctfe. Have a look in a list of fluoropolymers, I don't have my doc here. They aren't very cheap neither.

I didn't expect phenolic to operate at 150°C HCL.

First of all thanks for the reply,
I am a newby to industry, appologies for the confusion created.
let me clarify
 
the follower pipe will not be in contact with 20% HCl at 150'C permenantly,

1. The acid/steam inlet pipe goes through the follower pipe (the clearance between the two is only 1.5mm).    During operation the inlet pipe will get heated as much as upto 150'C, obviously the follower pipe also get heated to temperatures near to 150'C. that is a safe approximation i took.

2. Acid resistance propery for the follower pipe is desired since we dont want to replace the follower pipe for minute/ dropwise leak of HCl through the packings.

That is the follower pipe will be in elevated temperatures, when acid gets contacts with it.

hope this clarifies.
Also i ll go through the material you have specified.
Again thanks for the post




   

[Enthalpy]

An incomplete list of fluoropolymers: https://en.wikipedia.org/wiki/Fluoropolymers
Some general addresses for material properties, data quality varies:
http://www.matbase.com/
http://www.matweb.com/
http://www.bpf.co.uk/Plastipedia/Default.aspx
Check the prices as well, since some polymers can exceed hastelloy's price.

If you read German and have 89€, the best source by far is "Kunststofftabellen" by Bodo Carlowitz. Almost as good as datasheets by manufacturers but all in one book.