Discussion on Design of Piping Calibration Block Based on ASME BPVC

Mandatory appendix Article 4 ASME BPVC Section V introduces the requirements of PAUT inspection, and the general requirement for its calibration block is referred back to Article 4 with some modification. In order to make it more efficient in PAUT system calibration, this article gives some recommendations on calibration block's configuration, reflector position and size under condition of fulfilling the requirement of ASME BPVC Section V.