PDI Alternative ASME Ultrasonic Calibration Blocks

The new PDI Alternative ASME ultrasonic calibration blocks meet the requirements of the Performance Demonstration Initiative (PDI) Procedure No. PDI-UT-1, Rev. C, Fig. 4 (Ferritic) and PDI-UT-2, Rev. C, Fig. 4 (Austenitic). These cover the generic procedures for the ultrasonic examination of both ferritic and austenitic pipe welds. The blocks offer users an economical alternative to fabricating multiple curved cal blocks (pipe sections) in many diameters and wall thicknesses.

The blocks are normally supplied in sets of 3 individual blocks; one in A516 Grade 70 Steel, one in Type 304/304L Stainless Steel, and one in Type 316/316L Stainless Steel. Individual blocks of any one alloy are also offered.

Block design consists of steps (wall thicknesses) measuring 0.500", 1.000", 1.500", and 2.000". Each step contains an EDM slot machined to a depth of 10% of wall x .010" wide x 2.0" long. Overall block size is 2.00" wide x 2.25" tall x 10.00" long. The scanning and reflecting surfaces are intentionally machined to simulate pipe and plate surfaces of 250 Ra maximum finish. Each block is permanently machine-engraved on one edge to include the block description, serial no., alloy, heat no., and PH Tool™. The blocks are made from ultrasonically inspected, heat number-traceable material supplied by PH Tool.

A NIST-traceable Certification Report containing block and slot as-built dimensions is supplied. PH Tool Drawing No. 10052 and a certified material test report is also included in the data package.