DVS 2206-5-2010 Non-destructive testing of thermoplastic pipes Heating coils (HM) and heating element sockets (HD) Angular measurement of welded joints
2011DVS 2206-5-2011 Non-destructive tests on piping made of thermoplastics - Angle measurement on welded joints executed by means of sleeve welding with an incorporated heating element (HM) and heated tool sleeve welding (HD)
2010DVS 2206-5-2010 Non-destructive testing of thermoplastic pipes Heating coils (HM) and heating element sockets (HD) Angular measurement of welded joints