×
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

Source for probe to monitor interpass temperature?

Source for probe to monitor interpass temperature?

Source for probe to monitor interpass temperature?

(OP)
Preparing to qualify weld procedures for Duplex 2205 that must also pass ASTM A923 Practice C. Looking for a handheld digital probe and meter to monitor interpass temperature. Any source suggestions helpful.

RE: Source for probe to monitor interpass temperature?

RE: Source for probe to monitor interpass temperature?

Check with your local welding supply company.  They sell these crayon type markers.  The welder/inspector will mark the steel with this marker and the ink or whatever it is will only show at a given temp.  They make different crayons for different temps.  I know it sounds wierd, but I ran into a similar problem a few months ago, and I found out about these things.

RE: Source for probe to monitor interpass temperature?

(OP)
Thanks for the input. In this specific case the crayons were not recommeneded as they could contaminate the results of the ASTM A923 tests. I found an infrared thermometer with optional probe in stock at McMaster Carr. Most direct probe only meter readings took from 20-120 seconds vs 0.5 seconds for infrared.

RE: Source for probe to monitor interpass temperature?

Just make sure to have the infrared meter calibrated right for the surface you're investigating.  We had a bit of a kerfuffle last year till the inspector realized he had it on a setting more appropriate for concrete.

Hg

RE: Source for probe to monitor interpass temperature?

I agree entireley with HgTX's point - there can be significant discrepancries due to the meter not being calibrated to the surface.

RE: Source for probe to monitor interpass temperature?

(OP)
Thanks, this meter does have adjustable emissivity from 0.1-1.0, I noticed some meters are fixed at 0.95. My understanding is that cold rolled steel should be around 0.9 while shinier objects such as stainless steel may be around 0.3. I believe this unit is NIST certified and comes with a separate probe for comparitive reading verification.

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