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Fwd: Fwd: [MW:11546] Reheating Cracks

By Materials & Welding


---------- Forwarded message ----------
From: JALADHAR JENA <jdjena2006@yahoo.co.in>
Date: Thu, Jun 30, 2011 at 5:15 PM
Subject: Re: Fwd: [MW:11519] Reheating Cracks
To: pinaki boxi <boxi.pinaki@gmail.com>


Mr,
  this is very silly question and level -1 candidate is sufficient to give this reply.in which block u calibrate ,in that block  you should set decibal(gain)------. if you have to check welding ( as  per asme sec-5 ,article-4)
asme block reqd. may be V1 orV2 BLOCK. Secondly for welding side drill hole is not reqd. TDH is reqd. (1.6 mm  or 3.2mm) that is depend upon procedure. if u want to check parent metal FBH is reqd( as  per asme sec-5 ,article-5) that time only v2 block is needy. angle probe 70 degree is the best detector probe for cracking.may be trans verese crack,long. crackor star crak).
 
dada , in ut  angle probe used only transverse scanning that time operator shoulnot be do zig zack scanning.if u not scan properly with angulating way u cant detect any type of volumetric defect also. that is depend upon skill operator and skill welding inspector. Any type of crack indication is very sensitive and easily detect than other defect and its echo height ,shape is looking like blasted brinjal. 
 
 
keep it up
 
 thanks and regards,
 
 
jdjena
 
( now leve-2)

From: pinaki boxi <boxi.pinaki@gmail.com>
To: jdjena2006@yahoo.co.in
Sent: Thu, 30 June, 2011 11:58:44 AM
Subject: Fwd: [MW:11519] Reheating Cracks




Hello Mr. UT-LEVEL3
I have to inspect 132mm thickness SAW welding, CrMoV material
according API 934 for reheating cracks using TOFD.
If I didnt get wrong, I have to calibrate the system in the ASME Block
with the SDH and then adjust the gain on API block with the notches,
right??
Another doubt is about the crack characterization... its commom to
detect some porosity, even on transversal scanning, how we will judge
some signal to be reheating crack?
Thanks for the help.



--
Thanks & Regards
Pinaki Boxi.
Deputy Manager(QA/QC)
IOT-Paradip Site
Mob-+919178466059




--
Thanks & $Regards
Pinaki Boxi.
Deputy Manager(QA/QC)
IOT-Paradip Site
Mob-+919178466059

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