The safety of railway operations across the globe relies significantly on the quality and integrity of the railway tracks. Tracks in good condition serve as the foundation for safe and reliable transportation, reducing the likelihood of accidents and ensuring smooth operations. Achieving and maintaining such safety standards in the most efficient and cost-effective manner involves the implementation of Risk-Based Engineering principles. These principles provide a structured framework for assessing and mitigating potential risks associated with railway tracks.

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The safety of movement on any railway track in the world depends on the quality of the railway track. The most cost effective solution is following the Risk Based Engineering principles which requires correct and up-to-date information about all rails in the railway tracks. Detection and further monitoring of the technical state of rails with operational defects allow their timely replacement. One of the main components of the rails defects detection approaches is ultrasonic rail inspection, which allows detection of both surface and inner defects in the whole rail cross section (except for the rail base wings).

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Manual rail inspection on the track is used in two scenarios:

• As a confirmatory inspection of defects detected during continuous rail inspection using single-rail and double-rail flaw detectors or, in some cases, high-speed ultrasonic rail inspection systems.
• As an acceptance inspection of aluminothermic welded rail joints.

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Significant dynamic loads on aircraft wheel rims during takeoff and landing have compelled aircraft wheel manufacturers to introduce mandatory non-destructive testing of aircraft wheels for maintenance and repair companies.

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The middle link in the rail track quality management system (in the part of ultrasonic rail inspection) is the rails ultrasonic testing using hand-pushed ultrasonic rail inspection trolleys, also known as ultrasonic single-rail and dual-rail flaw detectors. This is the most widespread class of equipment used on all railways in the world.

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The control of corrosion and erosion damages is one of the essential engineering tasks solving of which ensures the long performance of the objects and constructions. Moreover, despite all the measures taken to increase the corrosion resistance of materials, control and monitoring of appearance and development of corrosion and erosion damages remains one of the most important elements of the Risk Based Engineering. These tasks are relevant for almost all major industries: nuclear, thermal and hydropower, chemical and petrochemical industries, oil and gas, piping, naval, railway and automotive transport, and others.

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The systems of OKOSCAN-73HS family can be mounted on different chassis depending on end user`s requirements. A railway car or a hi-rail truck with truck bed will allow using large monitors and comfortable conditions for operators` work which is essential during continuous inspection of large railway track areas. Usage of hi-rail trucks is the most universal option because it allows to start and finish inspection at any rail/road crossing. This helps to plan inspection in the areas with busy train traffic.

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Rails are one of the most important and, at the same time, most stressed elements of the railroad transport and metropolitan, since they are particularly exposed to the loading caused by the rolling stock as well as the dynamic loading. Due to the increased speed of the trains for the last years, and the increment loading of the freight cars, the development of service, fatigue-type defects in the place of contact of the train wheel with the rail head surface may occur. These are so-called “Rolling contact fatigue” (RCF) defects.

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