تست فیزره

Phased Array and Phased Array equipment selection guide

Summary:Choosing the right equipment for testing PHASED ARRAY is always one of the most important stages of testing and it is selected according to the manufacturing standard and technical details of the equipment to be tested. In this guide, the suggestions that are the result of exploiting the standards and experiences of experts based on the main Phased Array test equipment for the range of use can be seen.

تست فیزره

Phased Array and Phased Array equipment selection guide

Choosing the right equipment for the PHASED ARRAY test is always one of the important stages of the test and it is selected according to the manufacturing standard and technical details of the equipment to be tested, and in this guide, the suggestions that are the result of using the standards and experiences of the experts can be seen:

1 . Equipment:

The main equipment of Phased Array test is as follows

  • Phased Array device
  • Phased Array Probe
  • Sensitivity calibration blocks
  • Distance calibration blocks
  • scanner

2 . Application:

In this guide, the Phased Array test is reviewed for the scope of use in the following cases

 3. Equipment selection

3.1 Choosing an advanced ultrasonic device:

domain of usage
thickness
The number of two-channel pulses
Capabilities
welding test
For all application domains
Clause 2
up to 55 mm
At least 16 pulsers and 64 channels
Perform Phased Array and ToFD simultaneously
The possibility of connecting two PAUT probes at the same time
Has at least one pair of ToFD channels
Preparation of the output file that can be analyzed on the software
Ability to connect encoder
Ability to perform 4 scanning groups at the same time
55 to 130 mm
At least 32 pulsers and 64 channels
From 130 mm to more
At least 32 pulsers and 128 channels
Finding defects in equipment bodies and pipes caused by service to check the remaining life according to API 579 standard (other than welding)
up to 55 mm
At least 8 pulsers and 16 channels
Perform 2 Phased Array scans at the same time
Ability to save the image of the defect location
The ability to connect the encoder when preparing the corrosion map
55 to 100 mm
At least 16 pulsers and 64 channels
From 100 mm to more
At least 32 pulsers and 64 channels
3.2 Phased Array Probe Selection: (Also read: Probe Position Calculations)
thickness
Frequency
The number of elements
pitch
Thickness up to less than 6 mm
10 MHz
At least up to 16 elements
0.3 to 0.6 mm
Thickness 6 to 10 mm
7.5 to 10 MHz
At least up to 16 elements
0.3 to 0.6 mm
Thickness 10 to 16 mm
5 to 7.5 MHz
At least up to 16 elements
0.3 to 0.6 mm
Thickness 16 to 55 mm
5 MHz
At least up to 16 elements
0.5 to 0.8 mm
Thickness 55 to 85 mm
2.25 to 5 MHz
At least up to 32 elements
0.6 to 0.8 mm
Thickness 85 to 100 mm
2.25 to 5 MHz
At least up to 32 elements
0.8 to 1 mm
Thickness from 100 mm to higher
2.25 MHz
At least up to 32 elements
0.8 to 1.2 mm

3.3 Selection of Wedge Phased Array:

domain of usage
shoe material
Sound exit angle
Description
Phased Array welding test for all application domains of Clause 2
Rexolite
45 degrees of longitude
45 degree latitude
55 degrees latitude
60 degrees of longitude
60 degrees latitude
In the welding test of pipes up to less than 20 inches, the shoe should have an arc proportional to the diameter of the pipe
ToFD welding test for all domains of application Paragraph 2
Rexolite
45, 60, 65 and 70 degrees
The material of the shoe body is not a fundamental variable and the material of the center of the shoe must be observed
Finding defects in equipment bodies and pipes caused by service to check remaining life in accordance with API 579 standard (other than welding)
Prespex
or
Rexolite
zero degree
The maximum thickness that can be tested is about twice the thickness of the shoe
Rexolite shoe should be used for thickness above 60
   

3.4 TCG/DAC sensitivity block selection:

domain of usage
Weld thickness
Block thickness
SDH diameter
Description
Pressure vessel welding test
Designed according to the standard
ASME Sec VIII
up to 25 mm
± 25 %
Weld thickness
up to 2.5 mm parallel to the surface
The material of the block should be the same as the welding material.
The conditions of the block surface should be as similar as possible to the test piece
If there is a difference in the manufacturing process of the material of the block and the piece, the sound transmission coefficient should be calculated
It has 3 SDH in the depths of ¼, ½, ¾ thickness of the block
25 to 50 mm
± 25 %
Weld thickness
up to 3 mm parallel to the surface
50 to 100 mm
± 25 %
Weld thickness
up to 5 mm parallel to the surface
From 100 mm to more
± 25 %
Weld thickness
For every 50 mm increase in thickness up to 1.5 mm is added to the SDH size of the previous step.

To use the above blocks in tubular parts, if the surface of the block has an arc corresponding to the pipe under test, the use of the same block and reflectors is allowed.

3.5 Selecting the scanner block:

A piece of block of real material to be tested under the following conditions should be prepared by the employer and provided to the operators for daily checking of the system performance.

  • In the sheet welding test, this piece should be at least 50 cm long and with a thickness of ±25%.
  • In the pipe welding test of this part, at least half of the circumference of the circle, the thickness of the test weld should be ±25% and its diameter should be in the range of 0.9 to 1.5 times that of the main pipe under test.
  • The connection scheme should be similar to the part under test.
  • Defects are artificial or real, and the number, location and size of defects should be determined with the advice of PAUT level 3 expert.
  • The scanner block can be used to confirm the qualification of instructions and scan plan if approved by the level 3 expert
  • If the exact size and type of defects are known, the above block can be used as a block for preparing sizing instructions.

The recommended plan for preparing blocks with artificial defects is as follows:

    3.6 انتخاب اسکنر :

    domain of usage
    Scanner required
    Capabilities
    Testing of pressure vessel welds designed according to ASME Sec VIII standard
    Fully automatic scanner or semi-automatic scanner
    The possibility of installing at least two Phased Array probes
    Ability to install at least two ToFD probes
    The possibility of installing and connecting the encoder
    It has adhesive magnetic wheels or other mechanisms to connect to the tank
    Test of welds of storage tanks designed according to API 650 and API 620 standards
    Fully automatic scanner
    The possibility of installing at least two Phased Array probes
    Ability to install at least two ToFD probes
    The possibility of installing and connecting the encoder
    It has adhesive magnetic wheels or other mechanisms to connect to the tank
    Welding test of pressure pipes designed according to ASME B31.1 and ASME B31.3 standards
    Fully automatic scanner or semi-automatic scanner
    The possibility of installing up to two Phased Array probes
    Ability to install up to two ToFD probes
    The possibility of installing and connecting the encoder
    It has adhesive magnetic wheels or other mechanisms to connect to the tank
    Welding test of pipelines designed based on
    API 1104 standard
    Fully automatic scanner or semi-automatic scanner
    The possibility of installing up to two Phased Array probes
    Ability to install up to two ToFD probes
    The possibility of installing and connecting the encoder
    It has adhesive magnetic wheels or other mechanisms to connect to the tank
    Finding defects in equipment bodies and pipes caused by service to check remaining life in accordance with API 579 standard (other than welding)
    Fully automatic scanner or semi-automatic scanner
    or manual scanning
    The ability to connect and connect the encoder when preparing a corrosion map