Impact testing of weld overlay

[Sarfaraz Tambe]

Gents

We are manufacturing one Channel Shell for heat exchanger with  Design code ASME Sec VIII Div 1, API 660,TEMA Class R .

Shell Material - SA516 Gr 70 (Impact tested) + Monel Clad (10mm+3mm clad)

Nozzle Material - SA333Gr6/SA350LF2CL1 + Monel Weld Overlay (10mm+3mm overlay)

PWHT- YES

IMPACT- YES @ 0deg

Cladding & Overlay is for  corrosion resistance & not included in thickness
 Calculations.

and I have a welding procedure for Groove weld with impact testing to weld channel shell long seam & flange to pipe cirseam
Now My question are

 1) Do I need weld overlay procedure also  with impact testing to make overlay on clad strip backed area in long seam of channel shell or only chemical , LPT & bend test is sufficient?

2) Do I need weld overlay procedure  with impact testing for overlay inside pipe & flange. or only chemical,LPT & bend test is sufficient.

Kindly clarify in reference with ASME Sec IX 2013

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Warm Regards

 SARFARAZ

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

As you may see in the tables of QW 254 for Special Processes we do not have Supplementary Essential Variables.
So, a priori, if the overlay or cladding are not contributing to the pressure containment and to the support of the other loads of UG-22,
you do not need impact testing for the cladding / overlay.
In case cladding / overlay is also load bearing  then the applicable WPS has to be qualified as regular weld also
 

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor


I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS

Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
(See attached file: Dilintas_George.vcf)

This message contains confidential information. To know more, please click on the following link: http://disclaimer.bureauveritas.com

[Sarfaraz Tambe]

Sir

I agree with the answer but what about the base material (Pipe & Plate) on which we are doing overlay, as as per UCS-67 if base material is impact tested welding procedure also need to be impact tested so is that like we need to remove overlay & go for the impact test of base material? And one more thing is does it make any difference if i use SA106Gr.B pipe instead of SA333Gr.6 for procedure qualification if impact is required as SA106Gr.B comes as Hot Rolled & SA333Gr.6 as Normalized.

Kindly reply

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Warm Regards

TAMBE SARFARAZ

[in...@pieper-qsi.nl]

Dear Madam / Sir,

Thank you for your e-mail but unfortunately I’m out of office till September 22. I don’t have access to my e-mail account during this period and therefore can’t answer and /or react on any e-mail.
If necessary I will reply a.s.a.p. after I’m back in my office.

Best Regards,

Herman Pieper

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

two different issues:

1. A pressure retaining weld
2. An overlay weld either for corrosion protection of for hard facing.

You need then:

1. WPS no 1 for the pressure retaining weld
2. WPS no 2 for the overlay

You can qualify them separately
As far as the WPS no 1 is concerned you follow the steps below:

1. You check if exemption from impact test is granted by UG-20(f).
2. If not, you check if exemption is granted by UCS-66
3. If exemption is not granted you go to UCS-67 which for the qualification of the WPS no 1 is sending you back to UG-84. You must read carefully all those Code paragraphs.

Then you go to Section IX and you check all essential and supplementary essential variables. You will realize that the Group number is a supplementary essential variable which is affecting the qualification since you could not get any exemption from impact testing.
You check on Table QW-422 for the P-No and Group No, of SA106GRB and SA333GR6. You will realize that they are the same (1 and 1), So you can use the SA106GRB for your PQR.
Consider all the essential and supplementary essential variables for the WPS no 1!!!!

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor


I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS

Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
(See attached file: Dilintas_George.vcf)

Sarfaraz Tambe ---12/09/2014 05:20:16---Sir I agree with the answer but what about the base material (Pipe & Plate) on