Dear Mr.A V Rao.
QW-192 Stud-Weld Tests
QW-192.1 Procedure Qualification Specimens
QW-192.1.1 Required Tests. Ten stud-weld tests
are required to qualify each procedure. The equipment used
for stud welding shall be completely automatic except for
manual starting.
Every other welding stud (five joints) shall be tested
either by hammering over until one-fourth of its length is
flat on the test piece, or by bending the stud to an angle
of at least 15 deg and returning it to its original position
using a test jig and an adapter location dimension that are
in accordance with figure QW-466.4.
The remaining five welded stud joints shall be tested in
torque using a torque testing arrangement that is substantially
in accordance with figure QW-466.5. Alternatively,
where torquing is not feasible, tensile testing may be used,
and the fixture for tensile testing shall be similar to that
shown in figure QW-466.6, except that studs without heads
may be gripped on the unwelded end in the jaws of the
tensile testing machine.
Alternatively, where torquing to destruction is not feasible,
tensile testing may be used. For carbon and austenitic
stainless steel studs, the failure strength shall be not less
than 35,000 psi (240 MPa) and 30,000 psi (210 MPa),
respectively. For other metals, the failure strength shall
not be less than half of the minimum specified tensile
strength of the stud material. The failure strength shall be
based on the minor diameter of the threaded section of
externally threaded studs, except where the shank diameter
is less than the minor diameter, or on the original crosssectional
area where failure occurs in a nonthreaded, internally
threaded, or reduced-diameter stud.
Required Torque for Testing has been given in Sec IX QW 192.1.3
Torque test arrange ment as per Sec IX QW-466.5
With Best Regards
Nagarajan B
Materials Technology, QA/QC & Standards
Linde Engineering India Pvt. Ltd.
'Linde House'
Opp: VUDA Office,VIP Road, Karelibaug,Vadodara - 390018,India
Phone.: +91 265 3060235, Fax: +91 265 23335213, Mobile: +91 9099986027.
Nagarajan.Balaiah@linde-le.com, www.linde-india.com
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venkat rao ---20-01-2012 11:00:05---Dear friends we have to make PQR for stub welding ,according ASME-Sec-IX.i gone throw
From: venkat rao <hema.avrao@gmail.com>
To: materials-welding@googlegroups.com
Date: 20-01-2012 11:00
Subject: [MW:13518] Please help me to make PQR for Stud welding
Sent by: materials-welding@googlegroups.com
Dear friends
we have to make PQR for stub welding ,according ASME-Sec-IX.i gone throw sec IX i have some doubt regarding testing .
1.Stub-weld bend jig means ,how much angle we need to bend ??
2.Torque testing arrangement for stub welds,how much torque we have to apply??
3.Tensile test when it applicable ??
Regards
A V Rao.
QC inspector
PSCL.
Jubail.KSA.
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