Re: [MW:27088] Macro Photograph of PQR & Joint Preparation

Dear sir,

1. If you looking for complete penetration then PQR rejected with following details for understanding.

Yes it will be like concave, I agree with you . Until it not fully penetrated will not get fusion .  These is problem due to gas cup nozzle size diameter sticking with faying surfaces of wall thickness & higher arc length not advisable in welding.

Generally, AWS D1.1-2015 PG 97 Preqaulification .  Will give you idea about root opening range from Min 5 to Max 12 mm ( tolerances added ) in your case 4 mm.

Thanks & Regards

DINESH VITTHAL SOMWANSHI

BACHELOR IN MECHANICAL ENGINEER

AUTHORIZED PIPING / WELDING / NDT / PAINTING INSPECTION PERSONNEL
API 570 - Piping Inspector, AWS - CWI , CSWIP 3.1*,*BGAS  Gr 2 / 3
NDT II -UT , RT , MT , PT, VT
+7 924 374 6660 Russia , 00919881344135 India ( Whatsapp )
Skype = dinesh somwanshi

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On Thu, Nov 30, 2017 at 3:32 PM, Mayur Hiremath <hiremath.qaqc@gmail.com> wrote:

Dear Dinesh, 

Thanks for Quick Reply  appreciated .

Sir,

The Root Gap is 4mm we are welding it FCAW process Size is 1.2, it can be fusion with backing plate.

However As per the AWS  4.9.1.1 (3)the weld shall be complete fusion (fig 5.4) . If we refer Macro photograph it is not fused with backing plate also it is in concave fusion.  Can be passed or reject the PQR. 

Regards,

HIREMATH 

On 30-Nov-2017, at 9:04 AM, Dinesh Somwanshi <som.din@gmail.com> wrote:

Dear ,,

1)     As per the Weld Joint Preparation is "Single Bevel" But after welding it seen like "Single Vee" with other side bevel of 10° –  What Joint configuration will be Considered in the PQR / WPS as Result  -- Single V

2)     The attached Macro Photograph is seen that Root is not Penetrated with Backing Plate. – is this Result shall be Passed or failed. First thing i understand you looking for full penetration joint by putting backing plate. 

second thing how could be possible to obtain full penetration near narrow edge of root with small opening, As gas cup size some about 15 mm in diameter ? It cause ARC improper fray at root pass location. You must maintain ROOT gap IF looking for it. With Micros it looks like faying surface has better control over hot , fill , cap .  

Thanks & Regards

DINESH VITTHAL SOMWANSHI

BACHELOR IN MECHANICAL ENGINEER


Skype = dinesh somwanshi

असो द्यावी दया तुमच्या लागतसे पाया.

*Pray for others, sometime, You might never need to pray for yourself
again.....*

On Thu, Nov 30, 2017 at 1:39 PM, Mayur Hiremath <hiremath.qaqc@gmail.com> wrote:

Dear All,

Good Morning,

Please refer the attached Macro Photograph extracted from the single PQR test Coupon & Joint Preparation details. The thickness of test Coupon is 30 mm Grade of Material S460 ML & backing plate with 10 MM same Grade. The Weld Process is FCAW. PQR qualification is according to AWS D1.1 2015.

Based on the attached please clarify the Below comments is the Result to be Passed or Reject.

1)     As per the Weld Joint Preparation is "Single Bevel" But after welding it seen like "Single Vee" with other side bevel of 10° –  What Joint configuration will be Considered in the PQR / WPS as Result  

2)     The attached Macro Photograph is seen that Root is not Penetrated with Backing Plate. – is this Result shall be Passed or failed. 

Waiting for your valuable Response / comments with explanation stating Passed or Failed.  

Regards,

HIREMATH

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