QIS Non-Destructive Testing Services Limited

Ultrasonic testing (UT) is used to detect discontinuities in materials and welds. The most harmful discontinuities such as cracks, lack of fusion and lack of penetration are suitably detected by UT. Ultrasonic testing is a useful meaning for assessing the integrity of the welds in T, Y, K configurations and the heavy wall thickness welds during fabrication and in-service inspection. Our UT inspectors are well trained and qualified in accordance with worldwide recognized standards such as PCN, CSWIP, ASNT and SNT-TC-1A for categories of weld configurations from butt weld in plates, nozzle welds to tubular variable configuration node weld. The UT inspectors are familiar with inspection activities concerning with new fabrication and inservice inspection of Jacket platforms, topside structures, piping systems and pressure vessels.

Magnetic particle testing (MT) is used to detect the surface breaking and slightly subsurface discontinuities in ferromagnetic materials. These discontinuities may be linked to new fabrication processes or in-service of objects. The typical discontinuities can be found are cracks, voids, porosity, inclusions, seams, laps and fatigue cracks. Our inspectors are experienced, well trained and qualified in accordance with recognized worldwide standards such as PCN, CSWIP, ASNT and SNT-TC-1A.

Dye Penetrant testing (PT) is used to detect surface-breaking discontinuities in non-porous materials. These discontinuities may be linked to new fabrication processes or in-service of objects. The typical discontinuities that can be found are cracks, voids, porosity, inclusions, seams, laps, and fatigue cracks. In oil & gas, power generation, and chemical industries, PT is used to reveal the discontinuities of welds in stainless steels, double plex, bronze, aluminum, and other suitable materials during new fabrication and in-service inspections. Our inspectors are experienced, well-trained, and qualified by recognized worldwide standards such as PCN, CSWIP, ASNT, and SNT-TC-1A.

Radiographic testing (RT) is widely used to detect discontinuities in materials and welds. This method is most sensitive to volumetric discontinuities. It is currently used as one of the main NDT methods to provide QAQC reliability for new fabrications in oil & gas, power generation, chemical, and shipbuilding industries.

Our radiographic interpreters are experienced, well-trained, and qualified by worldwide recognized standards such as PCN, CSWIP, ASNT, and SNT-TC-1A for different categories of weld materials. The interpreters are familiar with the standards applied for fabrication and in-service inspection of Jacket platforms, topside structures, piping systems, and pressure vessels.

All our radiographers are trained and licensed by local government authorities for undertaking radiation works.

Periodical internal training in radiation safety and dummy runs in radiation emergency which are being undertaken has resulted in a noted zero accidents, and well protection of the public community and environment from radiation hazards in our past ten years of operations.

Eddy Current testing (ET) is widely used in industries for examining various properties of conductive materials. Among these, the detection of the in-service cracks in steel welds of crane pedestals and jackets of platforms is widely used during periodic maintenance inspections. The advantage of ET to magnetic particle testing (MT) is that surface discontinuities, like cracks, can be detected through the coating layers.

Our ET inspectors are experienced, well-trained, and qualified by worldwide recognized standards such as PCN, CSWIP, ASNT, and SNT-TC-1A.

Visual inspection is a common method of quality control,  data acquisition, and data analysis. Visual Inspection, used in the maintenance of facilities, means inspection of equipment and structures using either or all of the raw human senses such as vision, hearing, touch, and smell and/or any non-specialized inspection equipment. Inspections require Ultrasonic, X-ray equipment, Infrared, etc. are not typically considered Visual Inspection as these Inspection methodologies require specialized equipment, training, and certification.