Monday, July 11, 2011

RE: [MW:11663] CLAD MATERIALS - WELD -PWHT

Hi Swami,

 

Design Code is API 1104 but Client requirement is to follow the ASME code since the filler metal is not in API 1104.

 

With Kind Regards,

 

S.Elumalai.


From: pgoswami [mailto:pgoswami@quickclic.net]
Sent: Monday, July 11, 2011 6:05 AM
To: materials-welding@googlegroups.com
Cc: Sundaram Elumalai
Subject: RE: [MW:11643] CLAD MATERIALS - WELD -PWHT

 

Hi Sundaram,

 

A few queries on the top of what you've posted:-

  • What's the design code for the pipes? API-5LD is the default code for pipes ,but are the pipes a part of the system belonging to any ASME code.
  • If no ASME code is applicable then is there any client's specification for the piping. -

Typically for inconel clad( hope it's 625 or 825) pipes the industry standard is to use electrodes/filler wires compatible with 625, so extra care would be required.

 

By any chance is there an option of buttering the edges with 625 filler, followed by minor PWHT of the buttered layer +HAZ , thus avoiding the PWHT of the entire joint.

 

Appreciate your response.

 

Thanks.

 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist & Consultant

Ontario,Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sundaram Elumalai
Sent: Saturday, July 09, 2011 12:41 AM
To: materials-welding@googlegroups.com
Subject: RE: [MW:11643] CLAD MATERIALS - WELD -PWHT

Thanks Manpreet Singh,

 

Yes, My case is option 2. I have received the Cladded material from Owner and need to perform only BUTT welding. (Weld overlay is not my case).

 

From your answer, I understood that I need to follow the PWHT Sec VIII 1, UCS -56, but what about the Clad material property during the PWHT. ( Any corrosion impact on the Clad portion).

 

Just I have only this doubt, Clad portion will withstand the ASTM G48 test after the PWHT.

 

With Kind Regards,                                      

 

S.Elumalai.


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of manpreet
Sent: Friday, July 08, 2011 2:29 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:11635] CLAD MATERIALS - WELD -PWHT

 

Hi Sundaram,

 

Trust me, this can't be explained in single mail as you are not very specific with your question.

 

I assume procedure has to be qualified with ASME sec ix as Cladding has to be carried out for API pipes.

Process:- Try Pulse GMAW, can change deposition rates significantly

 

Refer AWS A5.14 for electrode

 

To qualify a procedure for corrosion resistant weld overlay, the welder must deposit a minimum 1.5" wide X 6" long pad of weld overlay on a test coupon using the guidelines/notes in QW-453. For performance testing, the welder must deposit a minimum 1/2" wide weld overlay consisting of a minimum of 3 weld beads in the first layer. This is done to achieve the necessary dilution with the base metal. There is no limit on the maximum number of layers for the weld overlay.

Base material, Consumable (AWS classification) and position should be within the allowable limits since these are essential variables, no limit on max thk of overlay deposit. 

PWHT is not applicable if you overlaying on the pipe but if you are butt welding 2 claddel pipes with inconel, it might be applicable to PWHT considering range of thickness per Sec Viii div 1 UCS-56 (i guess you are not going with 2nd option)

 

All tests per ASME Sec ix and Client spec:-

 

Dimensional Verification, visual inspection, Dye penetrant testing per Sec viii  div 1- App 8, dilution on weld surface shall not exceed 10% of base metal, root bead chemical analysis to match Inconel composition, transverse weld hardness survey (max 35 HRC), corrosion test (sour service), micrographic (*400)- microstructure of the HAZ should be free of precipitations and intermetallic phases, Side bends

 

For volumetric examination of CRA production groove welds, radiography (RT) is generally the best choice. Ultrasonic examination (UT) of CRA production groove welds is generally ineffective because of the nature of CRA weld metal 

 

Heat affected thickness to be minimized by lower heat input and higher travel speed.

 

Account all the suggestions and let us know ur case specifically.

 

 

Regards

Manpreet Singh



From: "Sundaram Elumalai"Elumalai.Sundaram@starfab.com.sa
Sent: Thu, 07 Jul 2011 18:25:41 +0530
To: materials-welding@googlegroups.com
Subject: [MW:11607] CLAD MATERIALS - WELD -PWHT

Hi Experts,

If anyone is having experience with the following CLAD materials, please give your input during the PQR / production weld. Is the PWHT will impact the corrosion property of Clad.

Pipe

NPS:10-Thk:45mm-PIPE-API 5L GR.X65 PSL2 - SMLS -GA-E-61036

BW

3mm Inconel Cladded

Pipe

NPS:12-Thk:15.88mm-PIPE-API 5L GR.X65 PSL2 - SMLS -GA-E-61036

BW

3mm Inconel Cladded

Pipe

NPS:12-Thk:45.5mm-PIPE-API 5L GR.X65 PSL2 - SMLS -GA-E-61036

BW

3mm Inconel Cladded

Pipe

NPS:12-Thk:53.5mm-PIPE-API 5L GR.X65 PSL2 - SMLS -GA-E-61036

BW

3mm Inconel Cladded

With Kind Regards,

S.Elumalai.

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