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Ultrasonic Flaw Detector Machine

Ultrasonic nondestructive testing, also known as ultrasonic NDT or simply UT, is a method of characterizing the thickness or internal structure of a test piece through the use of high-frequency sound waves. Ultrasonic flaw detectors are one of the most common non-destructive testing technologies. The ultrasonic testing device generates waves with very short frequencies (0.1 - 15 MHz) and transmits them into the material being tested through a transducer probe and a thin film of couplant.

Modern ultrasonic inspection equipment is small, portable, microprocessor-based instruments suitable for both shop and field use. They generate and display an ultrasonic waveform that is interpreted by a trained operator, often with the aid of analysis software, to locate and categorize flaws in test pieces. The ultrasonic flaw detector for sale will typically include an ultrasonic pulser/receiver, hardware, and software for signal capture and analysis, a waveform display, and a data-logging module. Although some analog-based flaw detectors are still manufactured, most contemporary instruments use digital signal processing for improved stability and precision.

DSS, as the top 3 ultrasonic flaw detector manufacturers and ultrasonic flaw detector supplier in China, stocks a range of ultrasonic flaw detection equipment which provide unmatched capabilities for quickly and accurately detecting, locating and sizing defects in industrial applications such as corrosion, cracks, delamination, bonding irregularities and other discontinuities which may be hidden deep in the material. These versatile ultrasonic flaw detector machines combine excellent inspection performance and usability for a wide variety of applications including welds, forgings, turbines and other structural components. 

As the professional ultrasonic flaw detector manufacturers and ultrasonic flaw detector supplier in China, DSS's comprehensive range of portable ultrasonic flaw detectors provide the end-user with unrivalled flexibility and performance in the field of non-destructive flaw detection. All ultrasonic instruments are field upgradable, reducing your downtime and increasing your working flexibility, rising to the challenge of your application. DSS is proud to offer some of the most powerful and rugged ultrasonic flaw detector machines on the market and our product development always focussed on the operator and end-user requirements.

Browse our range of ultrasonic testing device below.

  • HY-30 Digital Ultrasonic Flaw Detector
    This instrument can detect internal defects (such as cracks, inclusions, air holes, etc.), and can automatically locate, assess and diagnose. Widely used in the laboratory, the special inspection institute, shipbuilding, oil and gas equipment, aerospace, military, chemical, electric power, steel, metallurgy, railway, automobile, machinery, boilers and pressure vessels, special equipment.Each flaw channel can set the password independently. The customer can save the data and can not modify it.
  • HY-350 Ultrasonic Flaw Detector for Sale
    HY-350 Digital Ultrasonic Flaw Detector has Chinese touch keyboard, intuitive and easy to remember, full Chinese tip and graphics display of operating process, can be mastered after simple training.
    Instrument and probe performance of HY350 type digital ultrasonic flaw detector are automatic measurement, instrument calibration is automatic, thickness and material sound velocity can be measured, suitable for manual detection of irregular parts such as stamping parts, forging, and die.
  • HY-580 Ultrasonic Weld Inspection Equipment
    The instrument can detect internal defects (such as cracks, inclusions, porosity, etc.) and can automatically conduct location, assessment and diagnosis. This instrument is widely used in the laboratory, Special Equipment Inspection and Research Institute, shipbuilding, oil and gas equipment, aerospace, military industry, chemical industry, electric power, Iron and steel, metallurgy, railway, automobile manufacturing, machinery, boiler pressure vessels, special equipment, oil pipes, construction, mold manufacturing and other industries. We have rich experience in flaw detection of forging, casting, sheet, pipe, bar, steel alloy parts; customers are distributed all over the country, such as the national Special Equipment Inspection and Research Institute, National Steel Structure Inspection Center, Shanghai Petroleum Machinery Manufacturing Company, Shanghai Wind Power Company, BYD Auto Manufacturers in Zhejiang, China Railway Bureau, Xinjiang Petroleum Equipment Manufacturers, etc.

The Principle Of Ultrasonic Flaw Detector Machine

Ultrasonic Testing (UT) uses high-frequency sound energy to conduct examinations and make measurements. Sound waves are simply organized mechanical vibrations traveling through a medium, which may be a solid, a liquid, or a gas. These waves will travel through a given medium at a specific speed or velocity, in a predictable direction, and when they encounter a boundary with a different medium they will be reflected or transmitted according to simple rules. This is the principle of physics that underlies ultrasonic flaw detection machine. 

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. 

There are two methods of receiving the ultrasound waveform, reflection, and attenuation.

In reflection (or pulse-echo) mode, the transducer performs both the sending and the receiving of the pulsed waves as the "sound" is reflected back to the device. Reflected ultrasound comes from an interface, such as the back wall of the object or from an imperfection within the object. The diagnostic machine displays these results in the form of a signal with an amplitude representing the intensity of the reflection and the distance, representing the arrival time of the reflection.

In attenuation (or through-transmission) mode, a transmitter sends ultrasound through one surface, and a separate receiver detects the amount that has reached it on another surface after traveling through the medium. Imperfections or other conditions in the space between the transmitter and receiver reduce the amount of sound transmitted, thus revealing their presence. Using the couplant increases the efficiency of the process by reducing the losses in the ultrasonic wave energy due to separation between the surfaces.


Main Features of Ultrasonic Flaw Detector Machine


• Lightweight, a small volume, easy to use and to carry.

• Peak memory, envelope function, more easily for searching the highest waveform.
• Voice alarm for low voltage, automatic shutdown protection.
• Real-time display of flaw echoes (horizontal, vertical, distance, dB equivalent value), and weld profile display.
• The automatic instrument, automatic probe performance measurement, and automatic instrument calibration, which can measure the thickness and material sound velocity.

The Advantages of Ultrasonic Flaw Detector Machine

● Easy to portable.
● Minimal part preparation is required.
● High sensitivity, permitting the detection of extremely small flaws.
● High penetrating power, which allows the detection of flaws deep in the part.
● Only single-sided access is needed when the pulse-echo technique is used.
● ultrasonic inspection equipment has other uses, such as thickness measurement, in addition to flaw detection.
● Non-hazardous to operations or to nearby personnel and has no effect on equipment and materials in the vicinity.
● Electronic equipment provides instantaneous results, and the detailed images can be produced with automated systems.
Ultrasonic testing device is highly accurate in determining the reflector position and estimating size and shape.
● Greater accuracy than other nondestructive methods in determining the depth of internal flaws and the thickness of parts with parallel surfaces.

The Disadvantages of Ultrasonic Flaw Detector Machine

● Materials that are rough, irregular in shape, very small or thin, or not homogeneous are difficult to inspect.
● Linear defects oriented parallel to the sound beam may go undetected.
● Ultrasonic flaw detection machine requires an experienced operator who can set up a test with the aid of appropriate reference standards and properly interpret the results. 
● The ultrasonic inspection equipment normally requires a coupling medium to promote the transfer of sound energy into the test specimen.


The Applications of Ultrasonic Flaw Detector Machine

The ultrasonic flaw detector for sale can be widely used in the manufacturing industry, iron and steel metallurgy industry, metal processing industry, chemical industry and other areas requiring defect detection and quality control, and also widely used in aerospace, railway transportation, boiler and pressure vessel and other fields of in-service safety inspection and life assessment. It is a must in the nondestructive testing industry. Moreover, the ultrasonic testing device can also be used on concrete, wood, ceramics, and other solid composite materials, though lower resolution results will be obtained.

Some common applications include:

● Weld inspection -- by far the most important market for ultrasonic flaw detection machine.
● Primary metals -- beams, billets, bars, ingots, forgings, tubular stock
● Infrastructure -- bridge beams, bridge pins, railroad rails, metal structures.
● Petrochemical -- pipelines, tanks, support structures.
● In-service testing -- railroad wheels and axles, aircraft landing gears and engine mounts, crane booms, driveshafts, tanks, and pressure vessels, bolt testing.
● Manufacturing -- spot welds, braze joints, castings, bond testing.
● Composites -- aerospace parts, wind turbines, automotive composites, marine fiberglass.



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