Nondestructive tests (NDT) allow to detect the presence of defects in a product without affecting its operative performance or its properties. The nondestructive methods can be superficial or volumetric. Sider Test can carry out nondestructive examinations according to the below listed techniques, both at its headquarters or where components to be inspected are placed or installed. Apart from these methods, nondestructive testing includes also the execution and interpretation of metallographic replicas, the application of strain gauges and the hardness test made by mean of portable hardness testers.

All the methods listed below are performed by Sider Test by level 2 and level 3 certified personnel according to ISO 9712 and NT-TC-1A standards.

Main Test Methods

  • ASME V (2017) art. 4 (0 and III categories) – Weldings (accredited)
  • ASME V (2017) art. 5 (0 and III categories) – Materials (accredited)
  • ISO 17640:2010
  • EN ISO 16810:2014

Ultrasonic testing is a volumetric nondestructive technique. It is based on sound waves propagation into the product to be tested and on the related analysis and interpretation of the signals reflected or diffracted by the presence of internal defects. An ultrasound probe connected to the test equipment transmits short pulses of high-frequency sound waves into the item being inspected while passing over its surface by the mean of a couplant. Discontinuities and other defects cause some of the energy to be reflected according to the laws regulating the waves propagation. Sound pulses are viewed on a screen and technicians evaluate them to determine the presence and kind of the  defects. Ultrasonic testing is also used to measure the residual thickness of industrial equipment, like boilers, piping and tanks.

Visual test performed by a qualified technician allows to evaluate the superficial quality of the product and to identify defects or nonconformities. Visual inspection may be performed by naked eye or by mean of optical aids, like endoscopies or microcameras.

Main Test Methods

  • ASME V (2017) art. 9
  • ISO 17637:2003

Magnetic particle inspection, also known as Magnaflux testing, allows to detect and locate superficial and sub-superficial defects. This technique can be used only for ferromagnetic materials. The pieces to be inspected are magnetized, then a wet suspension or a dry powder containing fine iron oxide particles with high magnetic permeability are spread on their surfaces. Discontinuities distort the magnetic field and magnetic particles are attracted in these areas. Final inspection may be performed under natural light, if visible dry method has been applied, or in a dark environment, under the Wood’s lamp, in case of fluorescent magnetic particles.

Main Test Methods

  • ASME V (2017) artt. 7-25
  • ISO 17638 (2003)
  • ISO 9934-1:2015

Liquid penetrant testing can detect and locate superficial defects, like discontinuities, cracks and lacks of fusion. After the cleaning and preparation of the surfaces of the product being inspected, red visible or fluorescent dye penetrant is applied. The capillary action cause the penetrant to seep into the superficial defects. Then the excess liquid is removed from the surface and a developer, a powder or a liquid, is applied in order to draw the penetrant and make it visible showing the defects’ positions. Fluorescent liquids are highlighted by the ultraviolet light.

Main Test Methods

  • ASME V (2017) art. 6 (0 and III categories, accredited)
  • ASME V (2017) art. 24 SE-165 (0 and III categories, accredited)
  • ASME IX QW-453 (2017) (0 and III categories, accredited)
  • ISO 3452-1:2013

X-ray examination is a volumetric technique that is extremely valuable for the evaluation and troubleshooting of industrial parts and components. It is based on the variations characterizing the ionizing electromagnetic waves (like X or gamma rays) after penetrating the material being inspected. The radiographic film, after processing, provides an image reproducing the density, thickness, shape and structure of product under examination and highlights defects like internal discontinuities, porosity, blow holes and lack of penetration in welds.

Sider Test can provide also the restoration of defected materials through welding performed by qualified operators.

Main Test Methods

  • ASME V (2017) art. 2 (accredited)
  • ISO 17636-1 (2013) (accredited)
  • Three up-to-date facilities

  •  80 kinds of accredited tests

  • Fast response time

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