Re: [MW:23268] Material listed on WPS different from PQR

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

On Aug 4, 2015 2:32 PM, "SA" <sarfrazengineer@gmail.com> wrote:

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?

On Sunday, August 2, 2015 at 9:35:01 AM UTC+4, gerr...@yahoo.com wrote:

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

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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