Entries by Cate

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The main differences between a PQR and a WPS

Further to our last article where we discussed what a PQR and WPS is: This week we wanted to delve a little deeper and discuss the main differences. In case you are wondering, a WPS stands for ‘welding procedure specification’ and a PQR is ‘procedure specification record’. A WPS and PQR are mandatory documents when […]

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WPS and PQR’s. WHAT ARE THEY!?

A welding procedure specification (WPS) is a written procedure or set of instructions prepared to provide welding parameters for the making of a defect free weld. It can be used on production only after successful qualification of the supporting PQR. A WPS can be supported by one or multiple PQRs. Basically, a WPS allows welders […]

Weld Testing – Background

Weldtest New Zealand has extensive experience in the application of Non-Destructive Testing methods including magnetic testing (MT), liquid penetrant testing (PT), visual Inspections and ultrasonic testing (UT). Weld testing can be destructive testing or non-destructive testing (NDT). NDT is a wide group of analysis techniques used to assess the properties of a material, component or system […]

Advantages of Ultrasonic Testing (UT)

Ultrasonic Testing (UT) is a volumetric test that uses high frequency sound energy to detect cracks and other possible welding defects in welds and materials where the internal validity is critical. This method of non destructive testing (NDT) can also be used to measure wall thickness of materials. High frequency sound waves are passed through […]