DIN EN ISO 17640:2019-02 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2018); German version EN ISO 17640:2018
2019DIN EN ISO 17640:2019-02 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2018); German version EN ISO 17640:2018
2019DIN EN ISO 17640:2019 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2018)
2017DIN EN ISO 17640:2018 Non-destructive testing of welded joints – Ultrasonic testing – Techniques, test classes and evaluation (ISO 17640:2017); German version EN ISO 17640:2017
2011DIN EN ISO 17640:2011 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment (ISO 17640:2010); German version EN ISO 17640:2010