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09:21 Mar-03-2010
hemant suthar
regarding asme sec-ix group no.

what is the purpose of group no. in asme sec-ix and on what base it classified.

 
18:05 Mar-04-2010

Roger Duwe

NDT Inspector, API-510, 570, 653
MISTRAS,
USA,
Joined Jan 2009
148
Re: regarding asme sec-ix group no. In Reply to hemant suthar at 09:21 Mar-03-2010 (Opening).

Mr. Suthar, if you mean Group# [versus P#], the Group#'s are subsets of the P#'s that group materials with similar heat-input and heat-treatment characteristics, per ASME Section IX.
Group# is a Supplementary Essential Variable, and is used for controlled heat input Weld Procedures, like when the Impact Strength at Low Temperature is being tested and recorded during the Procedure Qualification.

 
07:19 Jun-07-2013

Ganesh V

Other, Site Inspection Supervisor
PDO,Oman,
India,
Joined Jun 2013
5
Re: regarding asme sec-ix group no. In Reply to hemant suthar at 09:21 Mar-03-2010 (Opening).

Group Numbers are assigned additionally to P-Numbers. These Group Numbers classify the metals within P-Numbers for the purpose of procedure qualification where notch-toughness ( Charpy V-notch impact test ) requirements are specified.
( Refer : QW.200.3 )

So, whenever the codes requires Impact testing, WPS shall specify the Supplimentary essential variables also, and PQR shall reflect the actual p Number's and its applicable Group Numbers, any changes after in WPS need to be requalified with a PQR again.

 
14:21 Sep-18-2013
Nelson
Re: regarding asme sec-ix group no. In Reply to Roger Duwe at 18:05 Mar-04-2010 .

Dear Roger Duwe,

Good info you give. How can i refer that it is related with "similar heat input & heat treatment characteristics" in code. i.e, any asme state these group number has been classified according to this? Please reply.
Thanks in advance.

Neo.

 
19:38 Sep-18-2013

Roger D. Duwe

NDT Inspector, API-510, 570, 653
MISTRAS,
USA,
Joined Jan 2009
148
Re: regarding asme sec-ix group no. In Reply to Nelson at 14:21 Sep-18-2013 .

Nelson, that is so basic that the answer is almost hard. This info comes from the definition of "P#" and "Group#". It is part of the foundation of ASME Sect IX. Without it, every different material spec & grade would require its own individualized PQR and WPS.

 


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