I dIsagree with Sohaib as this construction code is ASME B31.8 and welding code is API 1104.ASME BPV has no role over here.
I would say that you must qualify a new WPS for X60 as the material group of X60 and X65 are different as per API 1104 para 5.4.2.2. This is good for auditing purpose. I also recommend not to purchase dual marked certified X60/X65 as it violates grouping of API 1104.
Technically speaking, a dual certified X60/X65 would be no different than a X60 certified piping and so would not be having any different mechanical properties. On these technical grounds, you can use a dual certified X60/X65 pipe coupon for welding qualification of X60.
On the other hand, a dual certified pipe belong to two different materials group as per API 1104 should not be purchased, as you know that X60 and X65 belongs to two different material groups (see para 5.4.2.2). This can be a point picked up by an inspector or site auditor while auditing welding jobs.
That's why I recommend that a pipe certified in two different material groups as per API 1104 shall not be used as a coupon for welding qualification.
On the other hand, a dual certified pipe belong to two different materials group as per API 1104 should not be purchased, as you know that X60 and X65 belongs to two different material groups (see para 5.4.2.2). This can be a point picked up by an inspector or site auditor while auditing welding jobs.
That's why I recommend that a pipe certified in two different material groups as per API 1104 shall not be used as a coupon for welding qualification.
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Welder's Helper
Never bend my head infront of anyone other than GOD the almighty.
On Tue, Aug 3, 2010 at 7:35 PM, SOHAIB GHNAIMAT <sohaib_cegco@yahoo.com> wrote:
From: Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com>
Subject: [MW:6288] WPS for API 5L X Grades
To: "'materials-welding@googlegroups.com'" <materials-welding@googlegroups.com>
Date: Tuesday, August 3, 2010, 2:39 PM
What is your code of construction?
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of murali krishnan
Sent: Tuesday, August 03, 2010 5:03 PM
To: materials-welding@googlegroups.com
Subject: [MW:6287] WPSDear All,We have a WPS qualified for API 5L Gr X -65 to API -5L Gr X42,X52,X60/X65, of diameter range above 12 3/4" with wall thickness 3/16" - 3/4", welding done with SMAW process, electrode used for root is E 7010P1 and rest with E 8018C3, "My query is whether we shall do the welding with same WPS for API 5L Gr X 60 to API 5L Gr X 60 if not we have to prepare new WPS for the mentioned material.
G.Murali krishnan
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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