Parallax is a method to 'estimate' the depth of the discontinuity in the weld; not for the measurement of volumetric flaws.
ವಂದನೆಗಳೊಂದಿಗೆ / Best regards,
Nandesh Kumar Arasappa
P.S. : Please don't print this e-mail unless you really need to.
--- On Thu, 30/5/13, Jean Staton <Jean.Staton@metco-ndt.com> wrote:
From: Jean Staton <Jean.Staton@metco-ndt.com>
Subject: RE: [MW:17841] Radiographic Film Interpretation Excess Penetration..
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Thursday, 30 May, 2013, 5:54 PM
It my be possible to perform a Paralax method. From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of bijoy joseph
Sent: Thursday, May 30, 2013 1:52 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:17838] Radiographic Film Interpretation Excess Penetration.. dear meisam, Please explain your secret technique to measure the 3 dimensional defect in RT On Mon, May 27, 2013 at 5:31 PM, meisam shokri arfaei <meisamshokri@gmail.com> wrote: Dear friend, At first look we should say it is not practical generally to measure the excess penetration from RT film because it is 2-dimensional. But some techniques may be employ to do this measurement by RT. Also some joints may be shown their excess penetration on RT film If you didn't use such techniques and your joint is simple butt joint, so your answer is NO. On Mon, May 27, 2013 at 12:54 PM, Dominic v.k.dominic <v.k.dominic@gmail.com> wrote: Dear friend , my question is excess penetration how is measuring the rt film like ruler scale..your knowledge it is possible Dominic V.K. On Mon, May 27, 2013 at 10:28 AM, Babur Khan <mbabur.bwp@gmail.com> wrote: 1st you mention construction code which applicable if ASME B31.3-2008 then see Table 341.3.2 Acceptance Criteria for Welds and Examination Methods for Evaluating Weld Imperfections as per this
L Height of reinforcement or internal protrusion [Note (8)] in For T w, mm (in.) Height, mm (in.)
any plane through the weld shall be within limits of
the applicable height value in the tabulation at right, ≤ 6 (1⁄4) ≤ 1.5 (1⁄16)
except as provided in Note (9). Weld metal shall merge > 6 (1⁄4), ≤ 13 (1⁄2) ≤ 3 (1⁄8)
smoothly into the component surfaces. > 13 (1⁄2), ≤ 25 (1) ≤ 4 (5⁄32)
> 25 (1) ≤ 5 (3⁄16)
M Height of reinforcement or internal protrusion [Note (8)] Limit is twice the value applicable for L above
as described in L. Note (9) does not apply. so and same like API 1104 have criteria
--
Regards BABUR KHAN LASHARI Welding Inspector (QA/QC) SATORP (JERP) Mob: +966 (0) 56 2179280 +92334 6186285 Skype Id : babur.lashari --
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