Non-destructive inspection (NDI)/non-destructive testing (NDT) is a method for detecting defects inside materials and minute surface flaws (cracks and cavities) without physically destroying the object being inspected. Methods are broadly divided into two types: methods that detect internal flaws by injecting radiation or ultrasonic waves from the outside of the material into the material, and methods that detect surface flaws by passing electric current or magnetic flux through the material surface.
We provide unparalleled non-destructive inspection services and accurate data by utilizing the technology we have cultivated as doctors of buildings and plants, as well as our own unique technology evolved through digital transformation.
We have achieved the digitalization of field notebooks for visual inspections in SDM construction (regular maintenance construction) at petrochemical and refining plants. We provide high-value-added technology and services that solve problems with the aim of "reducing overtime hours for inspectors, allocating the right number of teams, and quickly submitting reports."
With the digital transformation of visual inspections, inspectors who visually inspect open equipment at plant sites input inspection data into tablet devices and send it to a cloud server. Reports are created in real time from the inspection record data, providing inspection results quickly. This contributes to a significant reduction in the time it takes to create daily inspection records and a reduction in overtime hours.
By using drones to inspect large structures, we can improve the safety and efficiency of the inspection work and reduce costs. In addition to visual inspection using a drone-mounted camera, we also support inspection using UT (ultrasonic inspection) drones.
We provide inspection services using various customized drones, including non-destructive inspectors and UT drones for ultrasonic inspection, which meets a variety of inspection needs while also helping to reduce incidental costs associated with inspections.
In order to meet a variety of inspection conditions and requirements, we provide non-destructive inspection services using specialized inspection technologies such as scale checkers, eddy current arrays, fluorescent X-rays, live video X-rays, heat exchanger tube extreme value analysis, and AC magnetics.
Understanding the current state of plant equipment, such as clogged pipes, scale buildup, and red rust, is essential for predicting failures, planning maintenance, and improving operational conditions. Our proprietary special non-destructive inspection device, the "Scale Checker," uses minute amounts of radioisotopes (not subject to legal restrictions) to measure and make visible foreign matter adhering to the inside of pipes.
In addition, it is possible to diagnose blockages inside pipes by measuring and visualizing internal foreign objects even under the following conditions.
Eddy current array is a special non-destructive inspection technique that uses multiple coils (32 coils, coil diameter 3mm) to maintain high detection capability over the entire length of the probe for the defect range being inspected. In addition, the results are displayed and recorded in easy-to-understand color images.
Eddy current array inspection offers the following advantages:
It can non-destructively identify the components of metal materials and has the following features and specifications.
In order to maintain the reliability of heat exchanger equipment and ensure safe operation, we perform tube removal inspections of heat exchanger tubes. This system combines a wall thickness measurement system and an extreme value analysis system, and estimates the remaining life of the entire heat exchanger tube from the measurement results.
The MDK Sensor is a special non-destructive technology that generates an AC magnetic flux in a coil, which passes through the test piece and returns to the sensor. This means that there is no attenuation of the magnetic flux as seen in eddy current testing, and it can reveal information about the outside and inside of the test piece.
The following are examples of flaws:
FRP tanks and other items deteriorate due to ultraviolet rays and the corrosive nature of the contents. Deterioration can be detected by UT diagnosis (ultrasonic diagnosis) using a "phased array*3." We also inspect CFRP products used in aircraft and automobile parts for internal defects and delamination.
For FRP (Fiber Reinforced Plastics) used in plants, etc., and CFRP (Carbon Fiber Reinforced Plastics) used in aircraft and automobile parts, detailed inspections are carried out to quantitatively check for deterioration, defects, and delamination using UT (ultrasonic diagnosis) using a "phased array*3."
*3 Phased array is said to be an advanced version of currently used ultrasonic flaw detection technology, and is equipped with multiple transducers (arrays) on one probe. These multiple arrays are controlled by electrical properties to set the angle, focal length, and focal point to create an ultrasonic beam. This allows the angle of the scanning beam to be changed quickly without moving the probe, enabling flaw detection with excellent detection capabilities.
This is a water immersion UT inspection (ultrasonic inspection) using our original internal ultrasonic flaw detection system IRIS. A water immersion UT tool is inserted into the heat transfer tube of a heat exchanger in a plant facility, etc., and ultrasonic waves are transmitted while the mirror at the tip of the probe rotates 360 degrees by water pressure, and a full surface inspection (wall thickness measurement) is performed.
Water immersion UT inspection, which utilizes our proprietary non-destructive inspection technology, the internal ultrasonic flaw detection system IRIS (Internal Rotary Inspection System), has the following features:
We provide non-destructive inspection services for overseas industrial plants. With the testing technology we have developed in Japan, we aim to contribute to solving global issues and are working on business overseas.
In Indonesia, many industrial infrastructure projects, such as refineries and chemical plants that were built in the 1990s, are reaching the time for large-scale maintenance. As the oil and gas business is the country's main export industry, there is a need to ensure the maintenance and safety of related plants.
Since 2016, we have been working with PT SUCOFINDO, an Indonesian state-owned comprehensive inspection company, to provide non-destructive inspection services (visual inspection, piping scale checker, boiler scale measurement, IRIS, etc.) for major chemical plants. In addition, since July 2021, we have been receiving orders every year from PT Asahimas Chemical Indonesia for open equipment visual inspection, eddy current inspection, and IRIS inspection during regular plant repairs.
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