Techshore Institute Blogs about Best Technical and Management Courses: Ultrasonic Testing

Showing posts with label Ultrasonic Testing. Show all posts

Monday, February 6, 2017

Techshore Inspection Services : Applications of Ultrasound testing methods.

Some of the applications for which ultrasonic testing may be employed include:

Flaw detection (cracks, inclusions, porosity, etc.)
Erosion & corrosion thickness gauging
Assessment of bond integrity in adhesively joined and brazed components
Estimation of void content in composites and plastics
Measurement of case hardening depth in steels
Estimation of grain size in metals

Real Life applications of Ultrasound Testing

Thickness Gauging:

Ultrasonic thickness gauging is routinely utilized in the petrochemical and utility industries to determine various degrees of corrosion/erosion.

Applications include piping systems, storage and containment facilities, and pressure vessels.

Flaw Detection - Delaminations

Contact, pulse-echo inspection for delaminations on 36” rolled beam.

Signal showing multiple back surface echoes in an unflawed area.

Additional echoes indicate delaminations in the member

Flaw Detection in Welds

One of the most widely used methods of inspecting weldments is ultrasonic inspection.

Full penetration groove welds lend themselves readily to angle beam shear wave examination.

References:

https://www.nde-ed.org/EducationResources/HighSchool/Sound/immersion.htm

http://www.asnt.org

https://en.wikipedia.org/wiki/Ultrasonic_testing

Best Oil And Gas Institute In Kerala
Best Oil And Gas Institute In Kochi
Best Oil And Gas Institute In Kaloor
Best Oil And Gas Institute In Kollam
Best Oil And Gas Institute In Calicut
Best Oil And Gas Institute In Trivandrum
Best Oil And Gas Institute In Karnataka
Best Oil And Gas Institute In Pathanamthitta
Best Oil And Gas Institute In Mannar
Best Oil And Gas Institute In Kottayam
Best Oil And Gas Institute In Perumbavoor
Best Oil And Gas Institute In Telangana
Best Oil And Gas Institute In Tamilnadu
Best Oil And Gas Institute In Mumbai
Best Oil And Gas Institute In Bahrain
Best Qa/Qc Institute In Kerala
Best Qa/Qc Institute In Kochi
Best Qa/Qc Institute In Kaloor
Best Qa/Qc Institute In Kollam
Best Qa/Qc Institute In Calicut
Best Qa/Qc Institute In Trivandrum
Best Qa/Qc Institute In Karnataka
Best Qa/Qc Institute In Pathanamthitta
Best Qa/Qc Institute In Mannar
Best Qa/Qc Institute In Kottayam
Best Qa/Qc Institute In Perumbavoor
Best Qa/Qc Institute In Telangana
Best Qa/Qc Institute In Tamilnadu
Best Qa/Qc Institute In Mumbai
Best Qa/Qc Institute In Bahrain
Best Mep Institute In Kerala
Best Mep Institute In Kochi
Best Mep Institute In Kaloor
Best Mep Institute In Kollam
Best Mep Institute In Calicut
Best Mep Institute In Trivandrum
Best Mep Institute In Karnataka
Best Mep Institute In Pathanamthitta
Best Mep Institute In Mannar
Best Mep Institute In Kottayam
Best Mep Institute In Perumbavoor
Best Mep Institute In Telangana
Best Mep Institute In Tamilnadu
Best Mep Institute In Mumbai
Best Mep Institute In Bahrain
Best Instrumentation Institute In Kerala
Best Instrumentation Institute In Kochi
Best Instrumentation Institute In Kaloor
Best Instrumentation Institute In Kollam
Best Instrumentation Institute In Calicut
Best Instrumentation Institute In Trivandrum
Best Instrumentation Institute In Karnataka
Best Instrumentation Institute In Pathanamthitta
Best Instrumentation Institute In Mannar
Best Instrumentation Institute In Kottayam
Best Instrumentation Institute In Perumbavoor
Best Instrumentation Institute In Telangana
Best Instrumentation Institute In Tamilnadu
Best Instrumentation Institute In Mumbai
Best Instrumentation Institute In Bahrain
Best Fire And Safety Institute In Kerala
Best Fire And Safety Institute In Kochi
Best Fire And Safety Institute In Kaloor
Best Fire And Safety Institute In Kollam
Best Fire And Safety Institute In Calicut
Best Fire And Safety Institute In Trivandrum
Best Fire And Safety Institute In Karnataka
Best Fire And Safety Institute In Pathanamthitta
Best Fire And Safety Institute In Mannar
Best Fire And Safety Institute In Kottayam
Best Fire And Safety Institute In Perumbavoor
Best Fire And Safety Institute In Telangana
Best Fire And Safety Institute In Tamilnadu
Best Fire And Safety Institute In Mumbai
Best Fire And Safety Institute In Bahrain
Best Hvac Institute In Kerala
Best Hvac Institute In Kochi
Best Hvac Institute In Kaloor
Best Hvac Institute In Kollam
Best Hvac Institute In Calicut
Best Hvac Institute In Trivandrum
Best Hvac Institute In Karnataka
Best Hvac Institute In Pathanamthitta
Best Hvac Institute In Mannar
Best Hvac Institute In Kottayam
Best Hvac Institute In Perumbavoor
Best Hvac Institute In Telangana
Best Hvac Institute In Tamilnadu
Best Hvac Institute In Mumbai
Best Hvac Institute In Bahrain
Best Logistics Institute In Kerala
Best Logistics Institute In Kochi
Best Logistics Institute In Kaloor
Best Logistics Institute In Kollam
Best Logistics Institute In Calicut
Best Logistics Institute In Trivandrum
Best Logistics Institute In Karnataka
Best Logistics Institute In Pathanamthitta
Best Logistics Institute In Mannar
Best Logistics Institute In Kottayam
Best Logistics Institute In Perumbavoor
Best Logistics Institute In Telangana
Best Logistics Institute In Tamilnadu
Best Logistics Institute In Mumbai
Best Logistics Institute In Bahrain
Best Ndt Institute In Kerala
Best Ndt Institute In Kochi
Best Ndt Institute In Kaloor
Best Ndt Institute In Kollam
Best Ndt Institute In Calicut
Best Ndt Institute In Trivandrum
Best Ndt Institute In Karnataka
Best Ndt Institute In Pathanamthitta
Best Ndt Institute In Mannar
Best Ndt Institute In Kottayam
Best Ndt Institute In Perumbavoor
Best Ndt Institute In Telangana
Best Ndt Institute In Tamilnadu
Best Ndt Institute In Mumbai
Best Ndt Institute In Bahrain
Best Automation Institute In Kerala
Best Automation Institute In Kochi
Best Automation Institute In Kaloor
Best Automation Institute In Kollam
Best Automation Institute In Calicut
Best Automation Institute In Trivandrum
Best Automation Institute In Karnataka
Best Automation Institute In Pathanamthitta
Best Automation Institute In Mannar
Best Automation Institute In Kottayam
Best Automation Institute In Perumbavoor
Best Automation Institute In Telangana
Best Automation Institute In Tamilnadu
Best Automation Institute In Mumbai
Best Automation Institute In Bahrain
Best Concrete Ndt Institute In Kerala
Best Concrete Ndt Institute In Kochi
Best Concrete Ndt Institute In Kaloor
Best Concrete Ndt Institute In Kollam
Best Concrete Ndt Institute In Calicut
Best Concrete Ndt Institute In Trivandrum
Best Concrete Ndt Institute In Karnataka
Best Concrete Ndt Institute In Pathanamthitta
Best Concrete Ndt Institute In Mannar
Best Concrete Ndt Institute In Kottayam
Best Concrete Ndt Institute In Perumbavoor
Best Concrete Ndt Institute In Telangana
Best Concrete Ndt Institute In Tamilnadu
Best Concrete Ndt Institute In Mumbai
Best Concrete Ndt Institute In Bahrain
Best Electrical Qc Institute In Kerala
Best Electrical Qc Institute In Kochi
Best Electrical Qc Institute In Kaloor
Best Electrical Qc Institute In Kollam
Best Electrical Qc Institute In Calicut
Best Electrical Qc Institute In Trivandrum
Best Electrical Qc Institute In Karnataka
Best Electrical Qc Institute In Pathanamthitta
Best Electrical Qc Institute In Mannar
Best Electrical Qc Institute In Kottayam
Best Electrical Qc Institute In Perumbavoor
Best Electrical Qc Institute In Telangana
Best Electrical Qc Institute In Tamilnadu
Best Electrical Qc Institute In Mumbai
Best Electrical Qc Institute In Bahrain,

Techshore Inspection Services : Ultrasound Testing Techniques – Normal and Angle Beam

While straight beam techniques can be highly effective at finding laminar flaws, they are not effective when testing many common welds, where discontinuities are typically not oriented parallel to the surface of the part. The combination of weld geometry, the orientation of flaws, and the presence of the weld crown or bead require inspection from the side of the weld using a beam generated at an angle.
Angle beam testing is by far the most commonly used technique in ultrasonic flaw detection.

Angle beam probes consist of a transducer and a wedge, which may be separate parts or built into a single housing. They use the principle of refraction and mode conversion at a boundary to produce refracted shear or longitudinal waves in a test piece as shown below.

Most commonly used angle beam probes generate a refracted shear wave at standardized angles of 45, 60, or 70 degrees in the test material. The incident angle necessary to produce a desired refracted angle is based on material sound velocities and is calculated from Snell’s Law through the equation below.

In the typical case of a plastic or epoxy wedge coupled to steel, low incident angles will generate both longitudinal and shear wave beam components, and specialized longitudinal wave angle beam wedges do exist. However at commonly used inspection angles only a primary shear wave will be generated, since the L-wave solution to the equation would exceed 90 degrees, which is not possible.

In typical inspections the sound beam will travel at the generated angle down to the bottom of the test piece and then reflect upward at the same angle. Moving the probe back and forth causes the sound beam to sweep across the full height of a weld. This scanning motion enables inspection of the entire weld volume and detection of discontinuities both at the fusion lines and within the weld body.

As in the case of straight beam testing, in angle beam testing the operator looks for reflections corresponding to discontinuities. During initial setup the operator must note any echoes that originate from weld bead or other geometric structures. Additional echoes appearing within the zone representing the weld would correspond to a lack of fusion, cracking, porosity, or other discontinuities whose type, depth, and size can be determined through further analysis.

In the example below, the sound beam passes through a good weld without reflecting back, and no significant indications are seen on the screen. A discontinuity within the weld zone, however, causes a strong reflection with the zone of interest marked by the red gate.

Sunday, October 9, 2016

Introduction to NDT (Non Destructive Testing)

NDT means Non Destructive Testing. Normally we may use two different types of testing methods such as destructive testing as well as non destructive testing for a test material. Destructive testing means we must destroy that particular test material and detect whether some defect is there or not. In this case we cannot use that material afterwards. So we are going for NDT. Here we are not doing any harm to the test material so that we may reuse it. NDT mainly follows two different standards.

· American Standards (ASNT)

· British Standards.

In NDT we are mainly dealing four different types of testing methods.

Ø Ultrasonic Testing (UT)

Ø Liquid Penetrant Testing (LPT)

Ø Magnetic Particle Testing (MPT)

Ø Radiographic Testing (RT)

Ultrasonic Testing (UT)

We are mainly using the Ultrasonic sounds waves for the testing. This method is commonly used for finding out the internal discontinuities present inside a test material. The sound waves will passes through the test materials and produce an echo.

Liquid Penetrant Testing (LPT)

LPT is the technique used for finding out surface discontinuity by applying a Penetrant on the surface of the test specimen.

Magnetic Particle Testing (MPT)

MPT also used for finding out surface discontinuity by utilizing the test specimens magnetizing property.

Radiographic Testing (RT)

RT is used for finding out internal discontinuity such as porous, cracks, voids. etc. This is done by making use of electromagnetic waves. And an image will be produced on the radiographic film. By analyzing the film we are able to find out the defect.

Techshore explains an Ultra Sound Beam

An Ultrasonic Beam produced by piexo electric crystal. Electricity is used to excite the crystal hence forth making it vibrate , the vibrational(mechanical) energy

is converted to waves which are used in the testing process.

An ultrasound beam consist of three zones

Dead Zone
Its is referred distance travelled by wave during as crystal ringing time / crystal vibration time. Every probe has independent crystal ringing time . No defects will be captured during this time.
Near Zone
Near zone is adjacent to Dead zone. In Near Zone the intensity of sound is varying and does not have any consistence. Hence the defects detected in this zone is either magnified or diminished once when compared with the actual defect due to varying sound intensity
Far Zone
Far zone is the ideal zone for observing the defects. Here the intensity of sound decreases gradually / periodically, which means there exist a consistency for sound waves in the Far Zone.

Video :

Additional references :

Friday, September 23, 2016

Pipeline inspection: crack detection technologies

Piping inspection: Crack Detection Technology

High pressure oil and gas pipelines are susceptible to develop crack defect regardless of coating. Crack Inspection Technology for liquid pipelines is ULTRASCAN.

Phased Array Technique is the most advanced Ultrasonic Technique. Used for thickness measurement as well as Crack detection and sizing.

It consists of multiple UT elements within a common sensor with simultaneously firing modes. Controlled focus and direction of UT waves will helps in identifying maximum resolution of wall thinning and corrosion. We are also able to detect complex crack features by adjustable firing modes and angles form the same sensor.

Electromagnetic Acoustic Transduction

Electromagnetic pulses generate ultrasonic guided waves within a pipe wall. This will provide a highly accurate crack detection, sizing and discrimination. And the sensors are also designed in such a way that the signal to noise ratio must be maximized. Sensor signals are then aligned and correlated.

Saturday, September 17, 2016

Techshore - NDT(Non Destructive Testing) Introduction 01

· American Standards (ASNT)

· British Standards.

In NDT we are mainly dealing four different types of testing methods.

Ø Ultrasonic Testing (UT)

Ø Liquid Penetrant Testing (LPT)

Ø Magnetic Particle Testing (MPT)

Ø Radiographic Testing (RT)

Ultrasonic Testing (UT)

Liquid Penetrant Testing (LPT)

LPT is the technique used for finding out surface discontinuity by applying a Penetrant on the surface of the test specimen.

Magnetic Particle Testing (MPT)

MPT also used for finding out surface discontinuity by utilizing the test specimens magnetizing property.

Radiographic Testing (RT)

Wednesday, September 7, 2016

Techshore Inspection Services Explains Ultrasonic Sound Testing.

Ultrasonic Sound Testing (USD)

Ultrasonic Testing (UT) uses high frequency sound energy to conduct examinations and make measurements. Ultrasonic inspection can be used for flaw detection/evaluation, dimensional measurements, material characterization, and more. To illustrate the general inspection principle, a typical pulse/echo inspection configuration as illustrated below will be used.

A typical UT inspection system consists of several functional units, such as the pulser/receiver, transducer, and display devices. A pulser/receiver is an electronic device that can produce high voltage electrical pulses. Driven by the pulser, the transducer generates high frequency ultrasonic energy. The sound energy is introduced and propagates through the materials in the form of waves. When there is a discontinuity (such as a crack) in the wave path, part of the energy will be reflected back from the flaw surface.

The reflected wave signal is transformed into an electrical signal by the transducer and is displayed on a screen. In the applet below, the reflected signal strength is displayed versus the time from signal generation to when a echo was received. Signal travel time can be directly related to the distance that the signal traveled. From the signal, information about the reflector location, size, orientation and other features can sometimes be gained.

Ultrasonic Inspection is a very useful and versatile NDT method. Some of the advantages of ultrasonic inspection that are often cited include

It is sensitive to both surface and subsurface discontinuities.
The depth of penetration for flaw detection or measurement is superior to other NDT methods.
Only single-sided access is needed when the pulse-echo technique is used.
It is highly accurate in determining reflector position and estimating size and shape.
Minimal part preparation is required.
Electronic equipment provides instantaneous results.
Detailed images can be produced with automated systems.
It has other uses, such as thickness measurement, in addition to flaw detection.

As with all NDT methods, ultrasonic inspection also has its limitations, which include.

Surface must be accessible to transmit ultrasound.
Skill and training is more extensive than with some other methods.
It normally requires a coupling medium to promote the transfer of sound energy into the test specimen.
Materials that are rough, irregular in shape, very small, exceptionally thin or not homogeneous are difficult to inspect.
Cast iron and other coarse grained materials are difficult to inspect due to low sound transmission and high signal noise.
Linear defects oriented parallel to the sound beam may go undetected.
Reference standards are required for both equipment calibration and the characterization of flaws.

The above introduction provides a simplified introduction to the NDT method of ultrasonic testing. However, to effectively perform an inspection using ultrasonics, much more about the method needs to be known.

Techshore Institute Blogs about Best Technical and Management Courses

Monday, February 6, 2017

Techshore Inspection Services : Applications of Ultrasound testing methods.

Real Life applications of Ultrasound Testing

Thickness Gauging:

Flaw Detection - Delaminations

Flaw Detection in Welds

Techshore Inspection Services : Ultrasound Testing Techniques – Normal and Angle Beam

Sunday, October 9, 2016

Introduction to NDT (Non Destructive Testing)

Techshore explains an Ultra Sound Beam

Friday, September 23, 2016

Pipeline inspection: crack detection technologies

Saturday, September 17, 2016

Techshore - NDT(Non Destructive Testing) Introduction 01

Wednesday, September 7, 2016

Techshore Inspection Services Explains Ultrasonic Sound Testing.

Ultrasonic Sound Testing (USD)

Top Reasons to Choose a Logistics & Supply Chain Management Course in Kollam, Pathanamthitta, Mannar, and Calicut

Search This Blog