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Ultrasonic Flaw Detectors
Calibration Blocks
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
75mm thick
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
Plastic body
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
x 30mm I.D.
Quadrant
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
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