[MW:11124] RE: 11122] ECA

Hi Rajiv,

 

AUT, both TOFD and Phased Array UT are  accepted state of art  NDE practice in ASME BPV code. ASME has approved these techniques through a series of code cases, see in the following hyperlinks.

 

ASME,Sec-V, article -4,, gives all the detailed requirements for both the techniques.

 

Depending on the availability within the NDE organization  both TOFD and Phased array can be  very effective tools for defect sizing  and ECA in future.

 

DNV OFFSHORE STANDARD F-101, clauses  B-100 through B-1200, provides good details on AUT(phased array) for offshore pipelines. On the contrary API-1104( 11.4.7.3 Automated Ultrasonic Weld Testing ) have very little  details about AUT and the reliability criteria is to be equated to manual pulse echo technique. My feel is that API-1104 is still lagging with respect to other codes to accept these techniques.

 

Should you need to convince your client on the acceptance of AUT , a good presentation with all the ASME code cases. techniques, good technical details , case studies would definitely be useful. Before you do that source the NDE service providers, audit their facilities, equipments, personnel qualifications and be happy with the NDE procedures.

 

Should you like to get more details on phased array feel free to download these books, as highlighted in the attachment.

 

Thanks.

 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario,Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

1. http://www.focusonndt.com/pipelines.asp
2. http://www.sonarinspection.ca/Ultrasonic_Testing.php
3. http://www.vsonomatic.com/publications/experience_with_code_cases.pdf
   

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of rajeev arora
Sent: Monday, May 23, 2011 4:42 AM
To: materials-welding@googlegroups.com
Subject: [MW:11122] ECA

Hello ALL ,

 

I am involved in one of the Onshore pipeline project , we are going to execute the welding with Automatic and SMAW process ,and NDE by AUT - Phases arrays .

 

we have reference in the specification for AUT for  Auto welding and Manual welding ,

• API -1104
• ASTM E1961
• ASTM E 164
• DNV -OS-F101

My queries is that , the above reference code / standard to be use for the AUT , except DNV , i can understand the involvement of the API and ASTM but not about the DNV because if is for offshore service.

 

the client / PMC is not ready to understand the and asking to have the reference for AUT from DNV aslo in the Testing of equipment and Procedure.

we have the option to for ECA ( engineering critical assessment) and which shall be effect on the AUT procedure etc.

 

so , i need the some one have been faced such problem before , where ever the AUT procedure has to be evalute with two code reference i.e. API and DNV and ECA has beeen involved.

 

Regards

 

 

 

 

 

 

 

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