Dear Vino
Your approach is very positive and highly appreciated.
When production welds are welded with unknown parameters by using various welders (about 50tanks welding is completed out of 100 tanks as per query) on which parameters PQR can be qualified?
With involvement & acceptance of client may be test coupon can be taken directly from production welds by considering each welding process & welder vise for the Mechanical testing as required for procedure qualification. Further test coupon removal areas shall be attached with the insert plate.
By doing so cannot be estimated the welding parameters but can be ensured integrity and mechanical properties of weld.
With my past experience none of client may accept any alternate proposal for such non-conformity, even none of ASME code specify any alternative proposal/exemptions for the same.
Regards
Sudhir Kumar
Dear Sudhir,I believe that we should always strive for positive approach without hampering the Integrity of product and delivers the final product as per service requirement.The best part is to get the Client fully involved and run a PQR with the same parameters and recommend that PQR qualification is carried by the same welder who welded the actual job.Yes..a non-conformance is required and attach a Corrective measure for Client further review.This is a very serious mistake and shall not be repeated in future.RegardsVino-Doha_____________________________________________________________________________________
On Wed, Nov 21, 2012 at 11:36 PM, Sudhir Kumar <sudhir18092@gmail.com> wrote:All welds shall be rejected. RT/UT & hydrostatic test are not substitute for such non-conformities. Any construction code for any type of welds, welding procedure is mandatory.
NDE does not confirm or guarantee the integrity of weld joints. Hydrostatic test does confirm the mechanical properties of Welds as hydro test pressure will be lesser than yield & tensile strength.
Regards--
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