×
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

SS 316 & 316L Temperature effect

SS 316 & 316L Temperature effect

SS 316 & 316L Temperature effect

(OP)
Hello,

I have an issue that needs to be resolved, you don’t need to go into much detail other than a quick brief on the  effects on SS 316 at process temperatures between 350 and 560 Deg.C. opposed to 316L.

Details:
Product is a pigment (an abrasive powder of <1um particle size), contains 5-10% ordinary silica sand (tonne/tonne). The pigment is inert, but there will also be a small percentage of chlorine, oxygen, CO2 and nitrogen entrained in the pigment. The chlorine will every now and again be in the form of HCl when we have large process upsets.

Regards,

Hugo

RE: SS 316 & 316L Temperature effect

I made a quick check of the ASME VIII Code (1968 Edition... sorry, its the only one I have in-hand at this time) and it appears that you may have problems with temperature for some grades.

SA240-316L  material is not suitable for use above 850 degrees F (450 degrees C).  

SA240-316 material is suitable for Code use up to 1500 degrees F (820 degrees C).  This sounds awfully high to me, so be sure to check out the current Code edition.

I have not attempted to address the environmental corrosion issues, just the strength issue per the ASME Code.

Hope this helps

Steve Braune
Tank Industry Consultants
www.tankindustry.com

RE: SS 316 & 316L Temperature effect

As per Steve Braune's post the 316 S/S is Ok strength wise, but you could possibly run into some corrosion problems from the Cl and HCl.  Being in abrasive service the 316 is going to stay in a condition that is amendable to corrosion form both the Cl(gaseous) and the HCl(gaseous).  If the equipment is maintained at your stated temperatures during upsets and you have no areas to trap the Cl products you should be ok while running.  I can only see some problems during a shutdown or outage where the atmosphere in the equipment drops below the dew point of the gases.  You will probably get some”rust”which in turn will quickly abraded off your process.

Can you come back with a little more description of your equipment.

RE: SS 316 & 316L Temperature effect

(OP)
Thank you for your help.  The temperature and HCl is the big issue here.  I belive we will select another material.
Regards,

Hugo

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