where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

MASHPROJECT LLC
Experts in hardness testing

1885 views
Technical Discussions
S KUNDU
S KUNDU
12:50 Oct-12-2015
EFFECTIVE HEIGHT OF PHASED PARRAY PROBE

Dear all ,

Please some one help me to understand that what is EFFECTIVE HEIGHT OF PHASED ARRAY PROBE.
(as per ASME SEC V Table V-421.)

Example: no of element-16
1st ele. h -- 11.2mm
wedge ang-- 36deg
pitch -- 0.6mm

    
 
 
Paul Holloway
Consultant, UT Level 3
Holloway NDT & Engineering Inc , Canada, Joined Apr 2010, 171

Paul Holloway

Consultant, UT Level 3
Holloway NDT & Engineering Inc ,
Canada,
Joined Apr 2010
171
23:01 Oct-12-2015
Re: EFFECTIVE HEIGHT OF PHASED PARRAY PROBE
In Reply to S KUNDU at 12:50 Oct-12-2015 (Opening).

# elements * pitch
16 x 0.6 = 9.6 mm

Pitch = element width + gap in between each one

    
 
 
S KUNDU
S KUNDU
13:06 Oct-20-2015
Re: EFFECTIVE HEIGHT OF PHASED PARRAY PROBE
In Reply to Paul Holloway at 23:01 Oct-12-2015 .

so effective Aperture and effective height is same ?

1    
 
 
Paul Holloway
Consultant, UT Level 3
Holloway NDT & Engineering Inc , Canada, Joined Apr 2010, 171

Paul Holloway

Consultant, UT Level 3
Holloway NDT & Engineering Inc ,
Canada,
Joined Apr 2010
171
21:58 Oct-20-2015
Re: EFFECTIVE HEIGHT OF PHASED PARRAY PROBE
In Reply to S KUNDU at 13:06 Oct-20-2015 .

Usually "aperture" is measured in the active direction and height is measured in the passive direction:

Imagine a 16 element probe, with a pitch of 0.6mm. With elements arranged like this:

||||||||||||||||

If you fired all 16 elements, the aperture would be 16 x 0.6 = 9.6mm (left to right dimension), and the height would be the height of each element (vertical dimension). Unfortunately, my ASCII graphics abilities have dwindled since the heyday of the 80's. You'll have to use your imagination that the above illustration is to scale.

1    
 
 
Anmol Birring
Consultant,
Birring NDE Center, Inc., USA, Joined Aug 2011, 702

Anmol Birring

Consultant,
Birring NDE Center, Inc.,
USA,
Joined Aug 2011
702
23:27 Oct-20-2015
Re: EFFECTIVE HEIGHT OF PHASED PARRAY PROBE
In Reply to S KUNDU at 13:06 Oct-20-2015 .

Usually height is the length of each crystal but ASME V, Art 4, Table V-421 defines height as the active aperture.

1    
 
 
Massimo Carminati
Consultant, AUT specialist
IMG Ultrasuoni Srl, Italy, Joined Apr 2007, 691

Massimo Carminati

Consultant, AUT specialist
IMG Ultrasuoni Srl,
Italy,
Joined Apr 2007
691
19:21 Nov-07-2015
Re: EFFECTIVE HEIGHT OF PHASED PARRAY PROBE
In Reply to Paul Holloway at 21:58 Oct-20-2015 .

It does not change a life, but the exact calculation for virtual aperture of a PA configuration is:
(Active elements-1)*pitch+e (element width). As an example, virtual aperture for 16 elements pitch 0,5 element size "e" 0,4 mm is:
15*0.6+0.4=9.4mm.
Please notice that "e" value is an essential variable according to ASME, but this value is not written in the PA probes data sheet (at least the old ones).

    
 
 

Product Spotlight

Magnetic X-Ray Pipeline Crawler

Zhong Yi brand pipeline crawler is magnetic/micro-video controlled crawler with DC X ray unit inst
...
alled for checking welding of pipeline. Move steadily inside the pipeline 6''-60''diameter with speed of up to 18m/min, Max. moving diatance 5 kilometers and provide the efficient inspection of the pipeline.
>

AIS229 - Multipurpose Real Time System

Latest standard & automatic real time system developed by Balteau. The AIS229 has been designed to
...
do series inspection in a wide variety of industry. Composed of a shielded cabinet, 5 axis manipulator, x-ray generator and tubehead from 160kV to 225kV, a fl at panel & much more, the AIS229 is most certainly one of the most multipurpose RTR system available on the market.
>

EKOSCAN Phased Array

In order to always fit your needs, EKOSCAN can manufacture any type of UT transducer, either convent
...
ional or Phased Array. As an ISO 9001: 2015 certified company, EKOSCAN is extremely careful as far a material selection and manufacturing processes are concerned. Our probes guarantee our customers the benefits of latest innovations regarding piezo-composite, backing, impedance adaptation layer, etc. Specific probes for hostile environment: high temperature, high pressure, corrosive environment,etc. Specific probes designed to fit your specific application: optimization of every parameter to guarantee you the best detection.
>

Swift & Scorpion2 - a state-of-the-art remote-control ultrasonic crawler

The Swift and Scorpion2 dry-coupled, remote-access ultrasonic crawler bring major efficiency and d
...
ata improvements to tank shell inspections and other structures such as vessels and offshore installations.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window