Magnum NDT Phased Array Presentation

Your NDT Solutions Provider

PHASED ARRAY

TECHNOLOGY

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INTRO • Magnum is an NDT Solutions Provider, not just an X-ray company.

• We have conventional X-ray as well as an Advanced Technology Program.

• Today, we are here to talk to you about that Advanced Tech, particularly Phased Array Technology (PAUT), and how it is changing the way we approach safety and efficiency.

• Tommy Ellis: Director of Advanced Services

Upstream

Midstream

Downstream

FEATURES OF ULTRASONIC TESTING

THE PERIMETER DIFFERENCE

X-Ray Testing

Phased Array Ultrasonic Testing

RELATABLE POINTS OF REFERENCE RADIOGRAPHIC TESTING

PHASED ARRAY ULTRASONIC TESTING

IQI’S (IMAGE QUALITY INDICATORS)

REFERENCE STANDARDS

WELD FLAWS

CONVENTIONAL ULTRASONICS Choice of 45°, 60°, or 70° Surface Distance

T

OR

Depth

Skip Distance

T

OR

V Path

A-SCAN

AMPLITUDE

100%

50%

0% 1

2

3

4

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TIME AND DISTANCE

7

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10

PHASED ARRAY TRANSDUCER A phased array transducer can be compared to a large singleelement transducer whose active area has been subdivided into small segments or elements. When connected to a phased array instrument, the direction and focus of the sound beam can be changed on each pulse repetition by pulsing individual elements at slightly different times or in different order.

Software known as a focal law calculator establishes specific delay times for firing each group of elements in order to generate the desired beam shape through wave interaction, taking into account probe and wedge characteristics as well as the geometry and acoustical properties of the test material.

PHASED ARRAY EXAMPLE

Porosity: Gas trapped by solidified weld metal before the gas can rise to the surface and escape the weld metal.

Creating a void in the material.

The radiographic image shows circular spots darker than the surrounding area because they will have a higher radiographic density. (Individual, scattered and wormhole)

POROSITY

Slag Inclusions: Nonmetallic material entrapped in weld metal or between weld and base metal.

The radiographic image shows dark jagged asymmetrical shapes within the weld or along the weld joint

SLAG INCLUSIONS

Cracks: Cracks can only be detected when they have spread in a direction that produces a change in the weld thickness that is parallel to the x-ray beam.

The radiographic image shows indications that appear as jagged and often very faint irregular lines

CRACKS

Lack of penetration

Incomplete Penetration or Lack of Penetration: Incomplete filling of the weld root when the weld metal fails to penetrate the joint. High vulnerability to cracking.

The radiographic shows a dark area with well-defined, straight edges that follow the root face down the center of the weld.

INCOMPLETE PENETRATION

Incomplete Fusion: A subsurface imperfection between the fusion of the weld metal and the base metal.

The radiographic shows lines oriented in the direction of the weld seam along the weld preparation or joining area

SECTORIAL SCAN WITH WELD OVERLAY

Road Map to certification as a Phased Array Level II Trainee – On-the-job with certified UT Level II (Conventional) Classroom Theory training for Level I qualification – 40 Hours Additional OJT with certified UT Level II – Documentation of hours Classroom Theory training for UT Level II qualification – 40 Hours Additional Field work with certified UT Level II – Documentation of hours SNT-TC-1A Requirement of 840 Hours minimum in Method and 1600 Hours in NDT Certification to UT Level II after verification of logged hours and passing a Practical exam

DATA DELIVERY & QC PROCESS

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