×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Weak sulphuric and chlorides

Weak sulphuric and chlorides

Weak sulphuric and chlorides

(OP)
Can anybody please help select MOC for stoage tank and pump for 5%wt sulphuric acid with chlorides at 85 degC, atmospheric pressure.

RE: Weak sulphuric and chlorides

Sounds like you're getting into Hastelloy C 276 territory.

RE: Weak sulphuric and chlorides



85 oC is quite hot. a number of supler duplex stainless alloys in the hotspots with rubber lined equip. and FRP piping and vessels used in the cooler areas to control the costs.

Hastelloy C-276 is an expensive option and is usually confined to various fittings that have a limited range of materials selections available.

Materials selection is critical, as you know that service is notorious for really agressive attack with just slight changes in the process chemistry. Good Luck,

RE: Weak sulphuric and chlorides

If the tank is atmospheric, there's no way I'd bother with high alloys- FRP will be far cheaper, and rather than being resistant to corrosion, the right resin will be essentially immune to corrosion by this mixture.  If it's a huge tank, you may want to consider FRP-lined steel or concrete instead.

As far as pumps go, it depends on what pressure you need, the percent solids in the stream etc.  85 C is too hot to recommend the normal thermoplastics (though PVDF may work if your pressure requirements are very modest).  You can get FRP mech seal centrificals and also PP or ETFE-lined centrificals with either seals or mag-drive, which are good to 150# class up to about 120 C.  Innomag (www.innomag.com) makes a very good lined magdrive. Others include Goulds, Durco etc.  These options are far cheaper than hastelloy or titanium.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources