Gulfnde Industrial Services India Pvt. Ltd. Ahmedabad, Gujarat

Dye penetrant inspection (DPI), also called liquid penetrant inspection (LPI) or penetrant testing (PT), is a widely applied and low-cost inspection method used to locate surface-breaking defects in all non-porous materials (metals, plastics, or ceramics). The penetrant may be applied to all non-ferrous materials and ferrous materials, although for ferrous components magnetic-particle inspection is often used instead for its subsurface detection capability. LPI is used to detect casting, forging and welding surface defects such as hairline cracks, surface porosity, leaks in new products, and fatigue cracks on in-service components.

Magnetic particle Inspection (MPI) is a non-destructive testing (NDT) process for detecting surface and slightly subsurface discontinuities in ferromagnetic materials such as iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part. The piece can be magnetized by direct or indirect magnetization. Direct magnetization occurs when the electric current is passed through the test object and a magnetic field is formed in the material. Indirect magnetization occurs when no electric current is passed through the test object, but a magnetic field is applied from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current, which may be either alternating current (AC) or some form of direct current (DC) (rectified AC). A technician performs MPI on a pipeline to check for stress corrosion cracking using what is known as the "black and white" method. No indications of cracking appear in this picture; the only marks are the "footprints" of the magnetic yoke and drip marks. A close-up of the surface of a (different) pipeline showing indications of stress corrosion cracking (two clusters of small black lines) revealed by magnetic particle inspection. Cracks that would normally have been invisible are detectable due to the magnetic particles clustering at the crack openings. The scale at the bottom is numbered in centimetres.

Gulfnde Institute of NDT Technology is organizing and conducting world class NDT level 1, 2, Welding inspector and other materials testing, inspection technology training and certification courses. The institute is recognized internationally for most experienced ASNT NDT Level III trainers, welding inspectors. Explore our training, certification and professional development offerings and discover a wealth of resources to help you to reach the quality targets. We conduct ndt training courses in Ahmedabad, Vadodara (Baroda), Rajkot, Bhavnagar, Surat, Gandhinagar, Bhavnagar, Nadiad, Anand, Ankleswar, Jamnagar, Morbi periodically. We conduct ndt courses in Various GIDC like Chhatral, Narol, Naroda, Odhav, Ramol, Bajwa, Makarpura, Por-ramangamdi, Ajwa, Metoda, Shapar – Veraval, Aji, Savli, Halol, Kalol, Kathwada, Changodar, Lodhika, Hazira, Kadi, Nandesari, Panoli, Ranoli, Sachin, Vapi.