Query related to F Number in welding

[NIKHIL THOMAS JOY]

Dear experts,

Greetings of the day

I have a query related to the F Number in welding process.

IF I QUALIFY A WELDER WITH F No.6, He can weld all F.No-6.

But, if I Qualify with F No.5, can he weld F No.1 to 4.

Experts please reply as per code reference.

BEST REGARDS,

NIKHIL THOMAS JOY

IWI LIMITED 

ADNOC-WHRP

0544975526

[Dhaneesh p]

hello 

please follow ASME SEC IX , QW- 433

Regards 

Dhaneesh 

[Bhavesh Patil]

No

He can weld only F No.5 Only refer QW 433

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[Kannayeram Gnanapandithan]

Ref ASME Sec9 QW- 433. 

On Mon, Nov 2, 2020, 2:30 PM NIKHIL THOMAS JOY <nikhil.t...@gmail.com> wrote:

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[VISHNU DAS BALACHANDRAN]

Please refer ASME Sec IX, QW-433,

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Vishnu Das Balachandran, PMP®

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[senthil vel]

Dear Sir

As per design the vessel have no PWHT ,

During Repair Preheat Need?

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[Kannayeram Gnanapandithan]

Refering code and Thickness 

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

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[George Dilintas]

see QW-433 in Section IX

F-no. 5 with backing qualifies only F-No. 5 with backing

F-No. 5 without backing qualifies only F-No. 1 with backing and F-No. 5 with and without backing

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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

[George Dilintas]

During the repair, you have to implement the same WPS used for production welds..

The depth of the repair may be smaller than the total weld thickness but the PWHT depends on the base metal thickness and not on the deposited metal thickness

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[Brijesh Maurya]

F-no. 5 with backing also qualifies F-No.1 with backing along with F-No. 5 with backing as per QW-433

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[Bien.ND | WIC]

Agreed this para.