WPS as per ASME SEc. IX

[Manoj John]

Dear Experts,

We have the following WPS as per ASME Sec. IX

Base metal - P5B + P8  (6" Sch 40 Pipe)

Welding process -  GTAW

Filler metal -  ER NiCr-3

Preheat temp - 180 degree C

PWHT - Nil

Trailing & backing gas -  Yes (Argon)

Can i use the above procedure for welding of ;

P5B group material fillet welding (seal welding of threaded joints) with ER NiCr-3 or ER NICrMo-3 GTAW process without PWHT 

Hardness test required for HAZ 235HV10.

your expert advice highly appreciated.

Thanks & Regards,

Manoj.

[Kurniatullah Sirajudin]

if this WPS will be applied for oil and gas service, you can refer to API RP 582 table A, and ASME IIC for selection wleding consumable

Regards

Kurniatullah Sirajudin

[George Dilintas]

let us take the some essential variables one by one:

Pno: see QW 403.11 and then QW 424. The combination you have does not help. It qualifies only PNo 5B to Pno *.

A no: due to the dilution between a low alloy and stainless steel most probably it will not match.

So no chance, you need a new PQR

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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