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Wednesday, January 18, 2017

RE: [MW:25937] PWHT T-T Cycle Range for WPS with Impact Requirement

It is not a maximum but is a minimum.  As the DBTT increases with increased time at temperature, the concern is that the procedure qualification coupon must see at least 80% of the time at temperature to be used in actual fabrication.  If your qualification was performed with greater time than the minimum, it is assumed that this a worse case scenario than will be experienced in fabrication.  Often, therefore, PQR test plates will be held for extended periods of time to allow for fabrication and a repair cycle or two, greatly exceeding the anticipated fabrication PWHT time.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Amit Vishwakarma
Sent: Wednesday, January 18, 2017 9:00 AM
To: Materials & Welding
Subject: Re: [MW:25924] PWHT T-T Cycle Range for WPS with Impact Requirement

 

Dear Experts

 

for e.g, PWHT of 30mm thk is heat treated at 610 degC for 150min then maximum soaking temp would be 150*(100/80) =  187.5min, if supplementary variables are considered

Please correct if I misinterpreted QW-407.2

 

Regards

Amit Vishwakarma

On Tuesday, November 15, 2016 at 4:10:50 PM UTC+5:30, Vivek Pandey wrote:

Dear sir,
if supplementary essential not required,then can we use existing 3 times PWHT cycle PQR for production weld thickness 25mm with SR cycle 1 hour.

1) What will be the effect of soaking time range higher on production weld if same existing 40mm thk PQR used on 25mm production weld with same soaking time as per PQR..

As per QW-407.2 .Soaking time and temp equivalent or at least 80% aggregate of encounter production weld.Soaking time not restricted for exceeding higher side.
please correct me if my interpretation is wrong.

Regards,
Vivek Pandey


On Tuesday, 15 November 2016 09:04:08 UTC+5:30, George Dilintas wrote:

your range in case impact test is a requirement starts from 16 mm and not from 5mm (since your test coupon is 40 mm)

Assuming the test coupon was Pno1 then the mandatory holding time was 1,6 hours and not 3 hours. Since you have used much more time than required you have to requalify your WPS

 

2016-11-14 11:40 GMT+02:00 Bhavesh Patil <bhavesh...@gmail.com>:

Dear Sir,

If we have PQR with PWHT for T-T 610°C & 3 Hrs. for Thickness 40mm as per ASME Sec. IX. for SMAW. Consequently we have WPS for Range of 5 to 200mm Thickness (PQR is tested for Impact at -27°C).

Now the Confusion is can we use same PQR to Prepare WPS for 25mm thick Production weld with T-T 610°C & 1Hrs if supplementary essentials are applicable? Now as per Table QW253 & QW 407.2 the production weld PWHT T-T cycle essentially Equivalent or at least 80%.

QW-407.2 A change in the postweld heat treatment
(see QW-407.1) temperature and time range
The procedure qualification test shall be subjected to
PWHT essentially equivalent to that encountered in the
fabrication of production welds, including at least 80%
of the aggregate times at temperature(s). The PWHT total
time(s) at temperature(s) may be applied in one heating
cycle.



Thanks & Regards,

Bhavesh

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--

Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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RE: [MW:25936] Sec. IX- QW-403.5

If impact qualification is not required;  Yes.

 

If impact qualification is required:  No

 

See QG-105.3 and QW-200.1(b)

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Unni Romes
Sent: Wednesday, January 18, 2017 5:41 AM
To: Materials & Welding
Subject: [MW:25924] Sec. IX- QW-403.5

 

Dear all,

 

Please be clarified, 

 

SMAW, PQR is qualified with P1, G1 to P1, G1, 

 

as group number is supplimentary, 

 

Does this PQR support the WPS for P1 G1 to P1 G2

 

Is there any interpretation reference for this? 

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RE: [MW:25935] Combining 2 PQRS

Yes you can combine them. 

 

NO it will not meet his requirements as you will be limited to the qualification thicknesses for base metal and weld metal of the GTAW process.  See QW-200.4(a)(1) and QW-200.4(a)(2).  His combined weld cannot be greater than 2T and 2t for the GTAW -  i.e. 11.04mm for both.  Thus, the root cannot be made on the 12.70mm thick weld.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Manoj Singh
Sent: Wednesday, January 18, 2017 1:09 AM
To: materials-welding@googlegroups.com
Subject: RE: [MW:25924] Combining 2 PQRS

 

Yes u can pls.refer sec Ix welding general requirement.

On 17 Jan 2017 9:35 pm, "John Henning" <jhenning@deltak.com> wrote:

NO - Per ASME IX.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Lalit Malla
Sent: Tuesday, January 17, 2017 6:07 AM
To: Materials & Welding
Subject: [MW:25915] Combining 2 PQRS

 

Dear Expert,

 

I am having 2 PQRs i.e.:

1. 2" Sch. 80 Pipe (thk.-5.54mm) - GTAW (70S-2)

2. 6" Sch. 160 Pipe (thk.-18.26mm) - SMAW (7018)

 

My question is: Can I combine these 2 PQRs for buiding up one more making new WPS for 8" Sch. 80 Pipe (thk.-12.70mm) using GTAW+SMAW (Root and hot with GTAW and filling and capping with SMAW)

 

Thanx in advance

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RE: [MW:25934] Combining 2 PQRS

Note:

 

Diameter is not an essential or non-essential variable for procedure qualification.

 

Diameter is an essential variable for weldor performance qualification.

 

Therefore not applicable to the question.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of prashant pansare
Sent: Wednesday, January 18, 2017 9:51 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:25932] Combining 2 PQRS

 

Check qualification limit for dia as per Sec IX.

 

On Jan 17, 2017 6:00 PM, "Lalit Malla" <lalit.malla@gmail.com> wrote:

Dear Expert,

 

I am having 2 PQRs i.e.:

1. 2" Sch. 80 Pipe (thk.-5.54mm) - GTAW (70S-2)

2. 6" Sch. 160 Pipe (thk.-18.26mm) - SMAW (7018)

 

My question is: Can I combine these 2 PQRs for buiding up one more making new WPS for 8" Sch. 80 Pipe (thk.-12.70mm) using GTAW+SMAW (Root and hot with GTAW and filling and capping with SMAW)

 

Thanx in advance

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RE: [MW:25933] Socket Weld WPS

Sorry to disagree –a socket weld is simply a fillet weld and a WPS can be written from a groove weld PQR to cover all fillet welds in addition to groove welds.  See Table QW-452.6.  Fillet welds must be referenced on the WPS and additional information for setting up the socket weld will have to appear on fabrication drawings or be included on the WPS (i.e. the 1/16 inch gap prior to performing the weld).  A separate WPS for each weld configuration is not required by ASME – typically referenced to fabrication drawings.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of dilintas
Sent: Tuesday, January 17, 2017 8:43 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:25918] Socket Weld WPS

 

No it is not. For every configuration you should draft a specific WPS. However a WPSS for socket welds could be supported by a PQR done on button welds if all essential variables are within PQR approval range 

 

 

 

Sent from my Samsung Galaxy smartphone.

 

-------- Original message --------

Date: 17/01/2017 13:00 (GMT+02:00)

Subject: Re: [MW:25914] Socket Weld WPS

 

Yes applicable for socket weld " fillet weld"

Ahmed Elsharkawy| QA/QC Engineer.

BV Representative Amal platform C project.

  ® Bureau veritas.

  Mobile:    (+20) 01110423873 

  Email:   Ahmad.Sharkawy88@gmail.com

 

 

On Jan 17, 2017 11:40 AM, "Ali Hayat" <alihayat01@gmail.com> wrote:

Dear All,

Does butt weld WPS is applicable for socket weld? Can anyone provide ASME IX code reference for this ?

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