Welder qualified 2 7/8 OD, whether he can weld 2” NPS

[MK]

Greetings,

Kindly shower your answers for the below query,

I have a weldolet 2” NPS X 1.25 mm thk (weldolet OD 82 mm) and I want to use the welder qualified for 2 7/8 (73 mm) & over to weld the above weldolet.

Query initiated by client that as per ASME SEC IX Table QW 452.3 foot note (b) states that 2 7/8 in. (72mm) O.D. is the equivalent of NPS 2 1/2 (DN 65). In this case client says that the welder is not qualified for 2 inch NPS.

since the welder qualification essential variable is OD inline with ASME SEC IX, kindly advise.

If any reference kindly share the same.

Thanks 

Murali

[Murali Krishnan]

Greetings,

I have a weldolet 2” NPS X OD 82 mm, I want to use the welder qualified for 2 7/8 (73 mm) & over.

Query initiated by client that as per ASME SEC IX Table QW 452.3 foot note (b) states that 2 7/8 in. (72mm) O.D. is the equivalent of NPS 2 1/2 (DN 65). In this case the welder client says welder is not qualified for 2 inch NPS.

since the welder qualification essential variable is OD inline with ASME SEC IX, kindly advice.

If any reference kindly share the same.

Thanks 

Murali

--

 

 

Thanks and Best Regards,

 

G.Murali krishnan
Mob : +966-501487307
Saudi Arabia

[james gerald]

I suppose you use GTAW + SMAW process.

For GTAW you need to perform welder qualification for 2inch NPS.

Upon deposition of 2 passes the OD varies and convince your client by practically measuring the OD for SMAW process

Thanks & Regards

J.Gerald Jayakumar

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[Sandeep Pr]

Dear Murali,

2" NPS OD will be 60.3 mm only. So You need separate qualification
for 2"NPS connection as per ASME Sec IX.

On 9/9/20, 'james gerald' via Materials & Welding

<material...@googlegroups.com> wrote:
> I suppose you use GTAW + SMAW process.
> For GTAW you need to perform welder qualification for 2inch NPS.
> Upon deposition of 2 passes the OD varies and convince your client by
> practically measuring the OD for SMAW process
>
> Thanks & Regards
>
> J.Gerald Jayakumar
>
>
>
>
>
> On Wednesday, 9 September, 2020, 10:57:04 am GMT+7, Murali Krishnan
> <muralig...@gmail.com> wrote:
>
> Greetings,
> I have a weldolet 2” NPS X OD 82 mm, I want to use the welder qualified for
> 2 7/8 (73 mm) & over.
> Query initiated by client that as per ASME SEC IX Table QW 452.3 foot note
> (b) states that 2 7/8 in. (72mm) O.D. is the equivalent of NPS 2 1/2 (DN
> 65). In this case the welder client says welder is not qualified for 2 inch
> NPS.
>
>

> https://groups.google.com/d/msgid/materials-welding/1464799251.105528.1599624753373%40mail.yahoo.com.
>


--
With Regards,

Sandeep.P.Raghavan

[George Dilintas]

What matters is neither DN nor NPS. What actually matters is the actual outside diameter

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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

[udaya bhaskar]

Dear Murali,

Welder is not eligible for 2".

Should be done separately.

--

[Nazeer]

Dear Mr.Murali,

Table QW-452.3 specifies the Outside Diameter of pipe, fitting, etc in Inch & mm units. Its not specifying the pipe size in NPS or DN.

Hence OD 73 mm & over qualified welder is qualified to weld 82mm OD .

For better understanding, refer the Table QW-452.3 in mm unit for 82mm OD

Thanks & Regards

Nazeer

[james gerald]

Dear Mr. Nazeer & All,

Weldolet comes with a Reinforcement which increases Thickness and OD and can it be considered like a Pipe.

Any reference of Code Interpretation with respect to Weldolet for welder qualification.

Thanks & Regards

J.Gerald Jayakumar

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.

[Murali Krishnan]

Thanks to the team for valuable suggestions and comments. ASME interpretations regarding the query. Kindly refer the below link and extract of the interpretations.

https://cstools.asme.org/Interpretation/InterpretationDetail.cfm?TrackingNumber=7114

 

 

Thanks and Best Regards,

 

G.Murali krishnan
Mob : +966-501487307
Saudi Arabia

To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/1618557440.2675908.1600240696187%40mail.yahoo.com.