Try this; prepare mock ups with open cross sections and plot what you see in the D-meter against what you can measure by a vernier with a bit of etching the edges.You will get some clue and from there you can get going. Not difficult really.
Good luck,
Shashank Vagal
--- On Thu, 6/8/09, Institute of Inspection Technology & NDT IITNDT <iitndt@gmail.com> wrote:
From: Institute of Inspection Technology & NDT IITNDT <iitndt@gmail.com>
Subject: [MW:2893] Re: THICKNESS GAUGING OF CLADDED/OVERLAID VESSELS/PIPING
To: materials-welding@googlegroups.com
Date: Thursday, 6 August, 2009, 2:13 PM
Dear, If you want exact measurement, it is better to produce similar calibration block of same material and as cladded to calibrate your D-Meter. But, as cladding use to be less thick you may not find much difference while velocity is concern in thickness measurement. (note the cladding fussion zone problems)
Sharief
On Tue, Jul 14, 2009 at 11:04 AM, <fmajdnia@technip.com> wrote:
Dears,
I seak advise on how to calibrate the normal Ultrasonic Thickness metering
device to measure the thickness of C.S. Vessels and piping with clad or
overlay while they are in service (on stream inspection). The required
accuracy of reading is 1 mm Max.
Thanks
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