IRIS Probes

Thickness and Flaw Inspection Solutions

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IRIS probe components

The internal rotary inspection system (IRIS) probes are well suited for petrochemical and balance-of-plant (BOP) tube inspections. They use an ultrasonic beam to scan the internal surface of the tube in helicoidal patterns, ensuring that the full length of the tube is tested. The IRIS probes operate in pulse-echo mode to measure wall thickness, material loss, and defect orientation within the range of 0.5 in. to 3 in. ID.

Various components are necessary to "build" an IRIS probe. The components are interchangeable and must be chosen according to the tube dimensions.

To build an IRIS probe, the following components are necessary:

TUA -Turbine heads

Sonde_Tube_IRIS_TUA-170.psd

IRIS turbines are propelled by water pressure to make them rotate at approximately 40 r/s. They include a 45° angled mirror that deflects the ultrasonic beam towards the tube wall.

Part Number
Item Number
Description
TUA-120
U8780157
12 mm (0.47 in.) IRIS turbine
TUA-170
U8780158
17 mm (0.67 in.) IRIS turbine

TUB - Ultrasound transducers

Sonde_Tube_IRIS_TUB-254_01.psd

IRIS transducers are focused immersion transducers with an external diameter of 3/8 in. (9.53 mm) and an element diameter of 1/4 in. (6.35 mm). They are available in 3 different central frequencies and 2 focal lengths.

Part Number
Item Number
Description
TUB-254-10M
U8280001
1.0 in. (25.4 mm) focal length, 10 MHz
TUB-254-15M
U8280002
1.0 in. (25.4 mm) focal length, 15 MHz
TUB-254-20M
U8280003
1.0 in. (25.4 mm) focal length, 20 MHz
TUB-381-10M
U8280004
1.5 in. (38.1 mm) focal length, 10 MHz
TUB-381-15M
U8280005
1.5 in. (38.1 mm) focal length, 15 MHz
TUB-381-20M
U8280024
1.5 in. (38.1 mm) focal length, 20 MHz

TUC - Centering devices

Sonde_Tube_IRIS_TUX_XS_03.psd

Part Number
Item Number
Description
Extent (Tube ID)
TUC-XS
U8780162
Extra-small IRIS centering device
0.45 in. to 0.71 in. (11.4 mm to 18.0 mm)
TUC-SM
U8780161
Small IRIS centering device
0.71 in. to 1.0 in. (18.0 mm to 25.4 mm)
TUC-MD
U8780160
Medium IRIS centering device. The TUC-MD comes with an additional flexible rod that can be used in the centering device for boiler bend applications. See "IRIS-FLEXROD" accessory description on page 35.
0.96 in. to 1.65 in. (24.4 mm to 41.9 mm)
TUC-LG
U8780159
Large IRIS centering device. The TUC-LG comes with an additional flexible rod that can be used in the centering device for boiler bend applications. See "IRIS-FLEXROD" accessory description on page 35.
1.5 in. to 3.0 in. (38.1 mm to 76.2 mm)
TUC-MD-FLEX
U8280250
Medium IRIS centering device mounted on flexible rod.
TUC-LG-FLEX
U8280251
Large IRIS centering device mounted on flexible rod.

TUD - Probe cables

Sonde_Tube_IRIS_TUD-N_01.psd

IRIS probe cables have two functions: they supply the water pressure required by the turbine; and they carry the ultrasonic signal with the use of a small coaxial cable. The coaxial cable has a Microdot connector on the probe end and a BNC connector on the instrument / pump end. The water is supplied by the pump through a quick-connect 1/8 in. brass fitting.

Part Number
Item Number
Description
TUD-N20
U8800530
IRIS probe cable, 20 m (65 ft)
TUD-N30
U8800532
IRIS probe cable, 30 m (100 ft)
TUD-BNC
U8800529
BNC to BNC signal cable, 3.7 m (12 ft)
TUD-LEM
U8800511
BNC to LEMO signal cable, 3.0 m (10 ft)

IRIS probe accessories

Part Number
Item Number
Description
Comments / Specifications
IRIS-FLEXROD
U8780156
Flexible rod for centering devices TUC-MD and TUC-LG
45° maximum bend angle between rods. One IRIS-FLEXROD comes with the TUC-LG centering device.
IRIS-FLOOD
U8780145
IRIS flood tube adaptor
For 3/4 in. (19.05 mm) and 1 in. (25.4 mm) OD tubes
IRIS-FILTER
U8780144
Water filter unit and hose
Comes with one 1/2 in. hose, 25 ft length with 3/4 in. brass fittings
IRIS-WP110
U8780146
Water pump, submersible, 110 V, 60 Hz
Dimensions (L × ∅): 63,5 cm × 10 cm (25 in. × 4 in.)
Weight: 12.8 kg (28 lb)
Comes with one 1/2 in. hose, 25 ft length with 3/4 in. brass fittings
IRIS-WP220
U8780147
Water pump, submersible, 220 V, 50 Hz
Dimensions (L × ∅): 84 cm x 8 cm (33 in. × 3 in.)
Weight: 6 kg (13 lb)
Comes with one 1/2 in. hose, 25 ft length with 3/4 in. brass fittings