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Re: [MW:13850] clarification for UT

By Materials & Welding
Dear Laxman Kumar, Lanco.

the Ultrasonic technique is very important for this kind of testing. As you want to test for plates or pipe the technique for testing will differ for each.

In case of pipe welds - Use Angle beam scanning with DAC curve plotting and use 45 and 70 degree probe for complete scan upto 2 nd harmonic. You can use TT type probe for near surface scan in case the weld surface is ground flush on surface used for scanning. Use grease for scan instead of water or oil to get better results.

In case of doubt please feel free to mail your doubts

Regards,

Manish Tikle
Shritara Engineers
& Project Consultants,
61/62, Unique Tower,
4, Padma Nagar,
Off Link Road,
Malad(W),Mumbai
Pin 400 064.
Telfax:+91 22 28813803.
e mail:shritara@rediffmail.com


From: Jagannath Sahu <jsahu1000@gmail.com>
Sent: Mon, 05 Mar 2012 08:25:44
To: materials-welding@googlegroups.com
Subject: Re: [MW:13822] clarification for UT
Dear Lakshman Kumar,
UT is  possible thk up to 8mm  to above as per ABS NDT Guide.

On Sun, Mar 4, 2012 at 3:14 PM, Pablo J Acelajado <pjacelajado@npc.com.sa> wrote:

March 4, 2012

 

Dear Lakshman Kumar,

 

UT is very normal for HSAW and LSAW pipe weld testing from 6.4 mm WT up to 31 mm WT. Specification for Line Pipe  ISO 3183:2007 / API 5L 44th edition make use of UT even for lesser than 12 mm WT.

 

Thanks.

 

PJA

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Lakshman Kumar.B
Sent: Sunday, March 04, 2012 11:46 AM
To: materials-welding@googlegroups.com
Subject: [MW:13818] clarification for UT

 

 

 

Dear all,

 

I'm having a doubt about UT.

 

Few of my friend are saying  that UT is not possible for thickness less than 12mm, especially for the weld joints that too pipe line's is not possible. (or maybe they hope, but practically I had successfully done and doing the same for less thk)

 

I'm having the following queries

1.       Why it is not possible?

2.       Any code / standard is it specified?

3.        Than what is alternate option for lesser thickness NDT(where RT is not possible/feasible due to any safety concern or accessibility)

 

Could any one help us to resolve the queries

Thanks and Regards................?

cid:image001.jpg@01CC3048.5836D9B0 

Lakshman Kumar.B|Manager |Lanco Infratech Limited

Plot No 1255 | Sanjeevani chowk | Mahanadi vihar | Cuttack 753004

Phone : + 91 671 2445033 | Mobile : +91 9937286851 |www.lancogroup.com

Go Green|The future will thank you

 

 

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