Material listed on WPS different from PQR

[sarfraz ahmad]

Previously the selected material for tanks construction was SA-516 Gr. 70 but to unavailability of selected material in the market, a comparison was made b/w chemical composition and mechanical properties of easily available material i.e. S355J2 and selected for construction instead of SA-516 Gr. 70. Now the question is that we have PQR for SA-516 Gr. 70 and the referenced WPS is listed with new material i.e. S355J2. can we use use these WPS and PQR?

[Kannayeram Gnanapandithan]

Check with Pnos, if same ,there will not be a problem

On 01-Aug-2015 8:43 pm, "sarfraz ahmad" <sarfraz...@gmail.com> wrote:

Previously the selected material for tanks construction was SA-516 Gr. 70 but to unavailability of selected material in the market, a comparison was made b/w chemical composition and mechanical properties of easily available material i.e. S355J2 and selected for construction instead of SA-516 Gr. 70. Now the question is that we have PQR for SA-516 Gr. 70 and the referenced WPS is listed with new material i.e. S355J2. can we use use these WPS and PQR?

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[José Juan Jiménez Alejandro]

If you are working with the ASME Code, and your materials share the same number P, then you can use the same WPS, in fact that's the reason for the existence of p and not have as many WPS, the P numbers grouped materials metallurgically they are similar.

2015-08-01 7:13 GMT-05:00 sarfraz ahmad <sarfraz...@gmail.com>:

Previously the selected material for tanks construction was SA-516 Gr. 70 but to unavailability of selected material in the market, a comparison was made b/w chemical composition and mechanical properties of easily available material i.e. S355J2 and selected for construction instead of SA-516 Gr. 70. Now the question is that we have PQR for SA-516 Gr. 70 and the referenced WPS is listed with new material i.e. S355J2. can we use use these WPS and PQR?

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Ing. Jose Juan Jimenez Alejandro

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[james gerald]

S355 J2 is not listed in ASME Sec.IX and hence to be considered as unassigned material which requires separate PQR. 

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

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From: Kannayeram Gnanapandithan <kgpan...@gmail.com>
To: materials-welding <material...@googlegroups.com>
Sent: Saturday, August 1, 2015 8:56 PM
Subject: Re: [MW:23243] Material listed on WPS different from PQR

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[SA]

Dear J.Gerald jayakumar,

The following statements are given in API-650.

Material specifications listed in Section 4 of this standard but not included in Table QW-422 of Section IX of the ASME Code shall be considered as P1 material with group numbers assigned as follows according to  the minimum tensile strength specified:

a)  less than 485 MPa (70 ksi)-Group 1; 

b) equal to or greater than 485 MPa (70 ksi) but less than 550 MPa (80 ksi)-Group 2; 

c)  equal to or greater than 550 MPa (80 ksi)-Group 3

According to above statements, our material i.e. S355J2 which has 470 MPa SMTS is P1 Group 1 material whereas API-516 Gr. 70 is group 2 material as per ASME Sec IX QW-422. therefore we need qualify a new PQR. Am i right?

[kvs reddy]

Check the UNS no belongs to which P no in section IX and concider it as same P no.

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