HUATEC PAUT Piping Calibration Block NDT Calibration Block

HUATEC PAUT Piping Calibration Block NDT Calibration Block

These pipe calibration blocks are specially-designed to facilitate phased array UT (PAUT). The block design includes various modifications to the original ASME design, including extra axial and arc length, a rearranged notch layout, and a 10° angled cut on one end for blocks over 5 NPS. These modifications help to minimize unwanted noise from the back wall while performing DAC/TCG calibrations with phased array UT equipment.

A calibration block should be a section of pipe of the same nominal size, schedule, heat treatment, and material specification as the material being examined. HUATEC maintains a large inventory of raw material for the machining of these standards, and they can be made from customer-supplied material as well.Our Phased Array Pipe Calibration Blocks contain (4) EDM notches (axial and circumferential on both OD and ID) at a depth of 8-11% of nominal wall thickness x 1/4 max wide (most notches are approximately (0.030-0.040) wide x 1.000 min long. Blocks 5 NPS and smaller are left at 360°, while blocks over 5 are milled to a 180/120/90/60° arc section (depending on nominal pipe size). All blocks are 12 in axial length minimum, or 10T, whichever is greater. Made in accordance with ASME Section V Article 4 Figure T-434.3, with PH Tool modification for PAUT.