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WPS PQR certificate is to be renewed every three year. If there is a change in any essential parameter, then the WPS PQR becomes invalid and has to be requalified.
No their is not any expairy for any WPS or any PQR
The validity of welding procedure depends on the requirements of the standard used for the qualification.
The following additional tests are required for a welding procedure qualified in accordance with EN ISO- for a period of one and three years, a suitable production welding test shall be carried out for HIGHER GRADE STEEL MATERIAL.
A PQR is a permanent record of variables used to qualify a welding procedure. there are no time limitation for both.
Definitely no expiration date as long the welding process meet the requirements, it can be implemented on any given projects.
WPS/PQR should be specific for any given project. finally there is no expiry date of WPS/PQR for structural welds.
yes there is any expiry date for WPS/PQR
WPS/PQR should be specific for any Given Project specification or in common as an example Welding of Structural steel WPS/PQR no expiry. only WQT can expire. Apart from this WPS/PQR can get amended by changing the Process of welding
