Qualification of Different group Nos for P1 material having Impact & PWHT

[Brijesh Maurya]

Dear experts,

I have query regarding QW-403.5

In my job, both impact & Pwht applicable.

My query is, If I qualify PQR with P1G1 with P1G2, then will my WPS be qualified for P1G1 TO P1G2, P1G1 WITH P1G1 & P1G2 TO P1G2?

Welding process: GTAW+SMAW & GTAW ( 2 PQR)

Regards,

Brijesh Maurya

[Karthik]

Hi,

No. Group Number is a Supplementary essential variable.

Thanks& Regards,

(Karthik)
Karthikeyan.S
M: +66-892512282

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[Karthik]

Hi.

In your case YES. Group number is supplementary essential variable

QW-403.5 Welding procedure specifications shall be

qualified using one of the following:

(a) the same base metal (including type or grade) to be

used in production welding

(b) for ferrous materials, a base metal listed in the

same P‐Number Group Number in Table QW/QB-422 as

the base metal to be used in production welding

(c) for nonferrous materials, a base metal listed with

the same P‐Number UNS Number in Table QW/QB-422

as the base metal to be used in production welding

For ferrous materials in Table QW/QB-422, a procedure

qualification shall be made for each P‐Number

Group Number combination of base metals, even though

procedure qualification tests have been made for each

of the two base metals welded to itself. If, however, two

or more qualification records have the same essential

and supplementary essential variables, except that the

base metals are assigned to different Group Numbers

within the same P‐Number, then the combination of base

metals is also qualified. In addition, when base metals of

two different Group Numbers within the same P-Number

are qualified using a single test coupon, that coupon qualifies

the welding of those two Group Numbers within the

same P-Number to themselves as well as to each other

using the variables qualified.

This variable does not apply when toughness testing of

the heat‐affected zone is not required by other Sections.

Thanks& Regards,

(Karthik)
Karthikeyan.S
M: +66-892512282