What is EN ISO 9934-4:2017?

EN ISO 9934-4:2017, also known as "Non-destructive testing – Magnetic particle testing – Part 4: Equipment," is an international standard that provides guidelines and requirements for equipment used in magnetic particle testing. This method is commonly used in industries such as manufacturing, automotive, aviation, and construction to detect surface and subsurface defects in ferromagnetic materials.

of Magnetic Particle Testing

Magnetic Particle Testing (MPT) is a non-destructive testing technique used to locate and identify surface and near-surface cracks, seams, and other discontinuities in ferromagnetic materials. It works based on the principle of magnetism, where magnetic field lines are used to visualize defects.

In MPT, a magnetic field is induced either by permanent magnets or by electromagnetic yokes. The test specimen is then covered with a magnetic paint or liquid suspension containing iron particles. When the magnetic field interacts with a defect, it causes magnetic flux leakage, attracting and accumulating the iron particles, thus forming visible indications.

Requirements for Equipment

The EN ISO 9934-4:2017 standard specifies various requirements for the equipment used in magnetic particle testing. These requirements ensure the reliability and accuracy of the inspection process, allowing professionals to effectively detect and assess defects.

Some of the essential requirements include the strength and quality of the magnetic field, proper control and calibration of the equipment, suitable illumination, and the provision of appropriate power supply and safety mechanisms.

The standard also covers specific guidelines for the design, construction, operation, and maintenance of both portable and stationary magnetic particle testing equipment.

Benefits and Applications

Magnetic particle testing offers several advantages over other non-destructive testing methods. It is relatively simple to perform, cost-effective, and provides immediate results. Furthermore, it can detect both surface and near-surface defects, making it suitable for various applications.

Common applications of magnetic particle testing include inspecting welds, castings, forgings, pipelines, and structural components. It helps ensure the integrity and safety of critical structures, prevent failures, and comply with industry regulations and standards.

In conclusion, EN ISO 9934-4:2017 defines the requirements for equipment used in magnetic particle testing. This standard plays a crucial role in maintaining the quality and reliability of non-destructive testing processes, contributing to the overall safety and efficiency of various industries.