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!

*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.

Jobs

API 6A-Annex M Qualification of Heat Treating- No.of thermocouples for Calibration

API 6A-Annex M Qualification of Heat Treating- No.of thermocouples for Calibration

(OP)
Hi, Please i need your supports, and get clarified the below ,

Refering Below extract from API 6A

A minimum of nine thermocouple test locations shall be used for all furnaces having a working zone greater than
0,3 m3 (10 ft3).
For each 3,5 m3 (125 ft3) of furnace working zone surveyed, at least one thermocouple test location shall be used,
up to a maximum of 40 thermocouples.


My intrepretation for TUS of furnace with volume 53 cubic meters working zone was 16 thermocouples(ie, 53/3.5=15.14 No.s) to be used during calibration, an auditor explained the same in another way that 16 + 9 a total of 25 No.s Thermocuples shalll be used.

Please i need your supports, and get clarified.

RE: API 6A-Annex M Qualification of Heat Treating- No.of thermocouples for Calibration

The number of thermocouples required is not additive. You are correct, 16 thermocouples are required.

Valvit

RE: API 6A-Annex M Qualification of Heat Treating- No.of thermocouples for Calibration

I don't know how closely API tracks AMS 2750, the pyrometry standard for aircraft heat treating.

Industrial Heating ran this table in 2010 for the D version of 2750 (current version is E) for number of thermocouples based on a volumetric calculation.

The table splits the auditor's quantity of 25 and your quantity of 16 at a middling 20 (@57m3)



The original article and table are still on-line at
Link

I'm told that in the aircraft sector the auditor wins these kinds of arguments.

RE: API 6A-Annex M Qualification of Heat Treating- No.of thermocouples for Calibration

(OP)
thanks alot.. now can we use production furnace thermocouples for TUS ??

RE: API 6A-Annex M Qualification of Heat Treating- No.of thermocouples for Calibration

Please tell me this wasn't an API auditor. I have seen some stupid stuff from auditors over the years, but this one is really over the edge.

I don't see how the auditor could win this one.

Consider a sign at a gas station:
Minimum charge for any amount over 1 gallon: $9.00
Charge for gasoline shall be $3.00 per gallon.

So, according to this auditor, if you bought 6 gallons, you'd have to pay $27 (instead of $18)?

Quote:

now can we use production furnace thermocouples for TUS ??
Are you asking if you can use spare production T/C's for your survey?
I have never seen it done, but there is no reason it couldn't be done (provided proper documentation).

In general, however, the survey T/C's are Type K (Chromel/Alumel) and the production T/C's are Type S (Platinum/Pt-Rh). The cost of one Type S T/C could pay for a whole whole spool of Type K. It is common to run the survey with a few extra T/C's just in case one of two of them should fail during the survey.

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


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close