7/23/2019 High Temperature Probes.pdf

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UltrasonicsGE Inspection Technologies

Probes

for Ultrasonic Testing atHigh Temperatures

7/23/2019 High Temperature Probes.pdf

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GE Inspection Technologies   Ultrasonics

GEInspectionTechnologies.com

We reserve the right to technical modifications without prior notice. © 004 General Electric Company. All rights reserved.-

Hot Measurement

Always in demand requested

elay blocks made of heat-resistant

aterials have therefore already been

vailable for a long time. Placed on the

front face of conventional straight-beam

robes, they enable tests on hot materials

(fig. 1). At temperatures over about 100 °C,

the delay block can only be coupled to

the hot surface for a short period of time

nd must subsequently cool down, as

the temperature of the probe itself must

ot exceed approx. 60 °C. This might be

cceptable for thickness measurements,

but it sets considerable limits to flaw

etection. The short coupling period

oes not allow any echo peaking.

ow field-orientated

In cooperation with the German Federal

Institute of Material Testing (BAM), angle-

eam and T/R probes resistant to continuous

eating to 250 °C have now been developed

(fig. 2). It is not until the temperature

rises above 250 °C that the probe will have

to cool down after measurement. The ma-

imum permissible contact temperature of

ngle-beam probes is approx. 350 °C, as

there is a risk of decomposition of the de-

ay material at higher temperatures. On the

ther hand, the delay material of T/R probes

s resistant to max. contact temperatures of

pprox. . eren coupan s are ava -

able, depending on the temperature range:

GT up to 250 °C, and ZGM up to 550 °C. At

emperatures over 550 °C, measurements are

possible by means of glass powder. The special

esign of these probes also enables measure-

ments at low temperatures up to -197 °C.

Angle-beam probes for angle beaming

Type Order N . Frequency

MHz)

Angle of

incidence*)

°)

Transduce

size

mm x mm)

Near field

length in

steel (mm)

perating

range*)

mm)

Echo width

mm)

ontact face

mm x mm)

W45B2GV

W 6 B2 GV

W45B4GV

W 6 B4 GV

66586

66587

66589

66590

2

2

4

4

5

60

5

60

10 x 13

10 x 13

 x

10 x 13

10 x 13

 x

5

5

70

70

7-300

7-280

-

5-450

5-425

-

5

5

25 x 36

25 x 36

 x

25 x 36

25 x 36

 x

Accessories ro e ca e MPKL2-V, Order No.: 6 261

*) at 150°C. Angle dependence on temperature approx. 0.26 degrees/10°C at 45 degree and 0.5 degrees/10°C at 60 and 70 degree

Fig. 1

Fig. 2

Straight-beam TR-probes

Type Order N . Frequency

MHz)

Trasnducer

mm Ø

Fokal distance

mm)

perating range

mm)

Echo width

mm)

Contact face

(mm Ø)

S V 66 593 4 10 18 2-750 12

Accessories  2 x robe cable MPKL2-V   rder No.: 65 261