UT Blocks, Clibration Block for Ultrasonic flaw detector, DAC, V1, V2, IIW type1 blocks
Order Code | Shape (Not to Scale) | Type | Description /Application | Standard Made To | Material Size |
V1 | ![]() | A2 (BS) |
I.I.W Calibration Standard. Calibration of Shear and compression wave probes. Checking beam angle, emergent point and resolution. Calibration of time base and gain settings.
| B.S. 2704 DIN 54120 IIW (International Institute of Welding) | Steel 25x100x300mm |
V1/50 | ![]() | A2 (BS) |
Generally as V1. Thicker block minimises side wall echoes.
| BS 2704 | Steel 50x100x300mm |
V2 (Specify hole diameter) | ![]() | A4 (BS) |
Small calibration block for site checking of shear wave probes, time base and gain. 1.5mm or 5mm diameter hole target
| BS 2704 IOW (Institute of Welding) | Steel 12.5x43x75mm |
V2/20 (Specify hole diameter) | ![]() | A4 (BS) |
Generally as V2. Thicker block eliminates side wall echoes. 1.5mm or 5mm diameter hole target.
| BS 2704 | Steel 20x43x75mm |
BCB | ![]() | A5 (BS) |
Beam Calibration Block. Beam profile and resolution checks for shear wave probes. Sensitivity checks for shear and compression probes. 9 off 1.5mm holes.
| BS 2704 | Steel 50x75x305mm |
A6 | ![]() | A6 (BS) |
Evaluating dominant frequency, pulse, length, dead zone and resolving power for shear and compression probes as BS4331 part 3,1974.
| BS 2704 | Steel 25x50x150mm |
RTB | ![]() | A7 (BS) |
Checking shear wave probe resolution as BS4331 part 3, 1974. Steps of 2,3,4 and 5mm.
| BS 2704 | Steel 74mm radius |
LSW | ![]() | SPECIAL |
Ladder step wedge for timebase calibration with thickness measuring compression probes. 8 steps from 1mm to 8mm.
| Tolerance of +0.000mm- -0.040mm | Steel 8x15x120mm |
LSW/M | ![]() | SPECIAL |
Generally as LSW with 15mm diameter steel inserts mounted in plastic. 8 steps from 1mm to 8mm.
| Tolerance of +0.000mm- -0.040mm | Steel inserts 10x20x140mm |
CSW | ![]() | SPECIAL |
Curved Step wedge for timebase calibration of thickness measuring probes. 5 steps - 2,4,6,8 and 10mm.
| Tolerance of +0.000mm- -0.040mm | Steel 100mm long |
MU | ![]() | SPECIAL |
Metric Universal Block for general purpose checking as V1 block.
| Tolerance of 0.1mm | Steel 20x50x150mm |
TBR 2 125 (3) | ![]() | SPECIAL |
Radiused test block for calibration of boiler probes. 3 off 1.5mm holes.
| Tolerance of 0.004 inch | Steel 20x25x165mm |
TBR 2 125 (5) | ![]() | SPECIAL |
As TBR 2 125(3) - supplied with 5 off 1.5mm holes
| Tolerance of 0.004 inch | Steel 20x25x165mm |
A5 Blank Type B | ![]() | ESI |
Determination of signal curve and beam characteristics of single crystal probes (longer range). 1.6mm diameter hole.
| ESI 98-7 | Steel 50x75x305mm |
A5 Blank Type C | ![]() | ESI |
Determination of signal curve and beam characteristics of single crystal probes (longer range). 1.6mm diameter hole.
| ESI 98-7 | Steel 50x75x305mm |
ESI-BCB N-A5 | ![]() | ESI |
Checking twin crystal probes for sensitivity. Contains four additional 1.5mm diameter holes to A5 block.
| ESI 98-2 | Steel 50x75x305mm |
50 RAD | ![]() | ESI |
Checking pulse shape of shear wave probes.
| ESI 98-2 and ESI 98-8 | Steel 50x75x150mm |
ASME (Specify Thickness) | ![]() | ASME |
Setting sensitivity levels for weld testing. Sizes and locations of flaws are dependent on weld thickness.
| ASME Article 5 Fig T-546.1 | Steel Size dependent on weld thickness |
ASME/M (Specify Thickness) | ![]() | SPECIAL (ASME) |
Metric equivalent of ASME block.
| Tolerance of 0.1mm | Steel Size dependent on weld thickness |
DAC (Specify Thickness) | ![]() | SPECIAL |
Setting DAC characteristics for shear wave and compression wave probes. Flaws typically 1.5mm diameter holes at 20%, 40%, 60% and 80% of thickness.
| Tolerance of 0.0004 inch | Steel Size dependent on product thickness |
TAG: Ultrasonic Calibration Block UT calibration block V1 block