Reg:Longitudinal tensile and bend test

[Avinash Pandey]

Dear All

1. I have a query regarding transverse bend test and longitudinal bend test mention in ASME sec.IX.

2.when to use these test  for procedure qualification.

Regards 

Avinash Pandey

[george....@gr.bureauveritas.com]

Normally you have to perform transversal bend tests. If this is not possible (see QW-161.5) then you can replace the transversal bend test with longitudinal. In that case you have to refer to the table QW-451.2

best regards

Dr. Georgios Dilintas

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BUREAU VERITAS HELLAS

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Avinash Pandey ---23/04/2014 15:40:40---Dear All 1. I have a query regarding transverse bend test and longitudinal bend test

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[John Henning]

Refer to QW-161.5,  to whit:

 

“Longitudinal bend tests may be used in lieu of the transverse side-bend , face, and root bend tests for testing weld metal or base metal combinations which differ markedly in bending properties between  (a) the two base metals, or (b) the weld metal and the base metal.”

 

John A. Henning

Welding & Materials

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Avinash Pandey
Sent: Wednesday, April 23, 2014 1:25 AM
To: material...@googlegroups.com
Subject: [MW:20651] Reg:Longitudinal tensile and bend test

 

Dear All

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[Ramin Kondori]

As our dear friend, Mr. Henning mentioned, longitudinal bend is useful when testing weld metal or base metal combinations which differ markedly in bending properties. That's absolutely true...

I know from experience that in these cases, bend specimen may not "bend" as we want it to. This means that the weld may not be at the center of bent specimen where it should be.The specimen slips and normally, the weld area (weld + H.A.Z.) will not be at the center of bend and your bend test will not be valid...!!!

 Guided bend test helps but still, you need a skilled operator or maybe you do not have access to guide bend test apparatus. 

On the other hand, longitudinal bend test does not need any of these and with a simple apparatus, you will have a nice bend test. This becomes important when you are dealing with a critical weld and need to careful and critical. Just do not forget to prepare a large test coupon...!!!

Best Regards

Ramin Kondori

Sr. QA/QC engineer

Yadavaran Oilfield Project

SIPC (SINOPEC)

[Ahmet Cetiner]

Dears,

What should be the limit for "MARKEDLY" difference for the different metals. For instance, 1st parent material ductility is 15%, the other base material is 23%.. than can we consider this difference as a "marked" difference and choose longitudinal bending as per QW 161.5?

Thanks,

23 Nisan 2014 Çarşamba 09:24:35 UTC+3 tarihinde Avinash Pandey yazdı: