The names V1 and V2 are obsolete since 1993. The correct titles are calibration blocks no 1 (K1) and no 2 (K2):
Nondestructive testing - Ultrasonic examination - Specification for calibration block no 1 EN 12223:2000
Nondestructive testing - Ultrasonic testing - Specification for calibration block no 2 ISO 7963:2006 (identical to EN 27963)
The calibration block no 1 is bigger than the block no 2.
Best regards Udo Schlengermann GE Inspection Technologies GmbH, Huerth, Germany Convenor CEN/TC138/WG2 (UT) Chairman ISO/TC135/SC3 (UT)
----------- Start Original Message ----------- : Hello Dears, : Please, i want some answers of below questions; : Ultrasonc testing: : Which one is the big in size V1 or V2 and these belong to which standard. : What is beam divergence and how it is measured. : What is attenuation of sound beam and how it is calculated. : : : For CSWIP : : 1. What is lamellar tearing. : 2. What is weld decay : 3. What is the difference between Macrograph and micrograph. : API 510 : 1. CTOD is abbreviation of what. : 2. if the dia of vessel is 48then what is the grading distance for thickness measurement.\ : 3. if PHT is written on vessel name plate,what is the meaning of this. : Thanks for interest ------------ End Original Message ------------