PDI Alternative ASME Calibration Test Block (Metric Version) 4340 Steel

PDI Alternative ASME blocks are manufactured in accordance with 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 an economical alternative to fabricating multiple curved calibration blocks (pipe sections) in numerous diameters and wall thicknesses.

Overall block dimensions – 50mm wide x 57mm tall x 250mm long. 

Block design consists of steps simulating wall thicknesses measuring 12.5mm, 25mm, 38mm and 50mm. Each step contains a .25mm wide EDM notch, machined across the width of the step at a depth of 10% of wall thickness. Scanning surfaces and reflecting surfaces. Are machined to simulate pipe and plate surfaces of 250 Ra max finish. Each block is machine-engraved on one side with the Block description, Serial No., Alloy. All blocks are made from ultrasonically inspected.

Material: 4340 Steel