Nondestructive Testing service providers

  Material testing Mechanical testing  have been designed to test several weld properties.Few other material testing techniques are Charpy V-Notch Toughness: Notch toughness is the capacity that a material possesses to  absorb energy  in the  presence of a flaw , such as a notch or crack. The material will likely exhibit a lower level of toughness. When a flaw is present in a material, loading induces a triaxial tension stres s state adjacent to the flaw. The material  develops plastic strains  as the yield stress is exceeded, near the crack tip. Notch-toughness is  measured with a variety of specimens  such as the  Charpy V-notch impact  specimen or the dynamic tear test specimen. As with regular impact testing the tests are often repeated numerous times with specimens tested at a different temperature. With these specimens and by varying the loading speed and the temperature, it is possible to  generate curves such as those s...

  NDT Course fees depends on the type of NDT Course Selected, such a number of methods and the International standard chosen for the certification The Average course fees for General NDT course will be Rs.17500, This course fees Rs.17500 is for ASNT Level II Certification course of 5 NDT methods including – Ultrasonic Testing & Ultrasonic Thickness Testing, Radiography Testing & RT Film Interpretation, Visual Testing, Liquid Penetrant Testing, Magnetic Particle Testing, The split out the course fees are as follows Ultrasonic Testing – Rs.5000 Radiography Testing and RTFI – Rs.5000 Liquid Penetrant Testing – Rs2500 Magnetic Particle Testing- Rs.2500 Visual Testing – Rs. 2500 Few Institutes similar to Advanced Quality Centre  https://aqcinspection.com/  offer additional or bonus courses like Ultrasonic Thickness Gauging, Positive Material Identification PMI, Destructive Tests / Mechanical tests, etc. at free of cost. The Course for Mechanical QA QC Course shall be R...

Here are some rarely used  NDT – Few Other Methods 1.   Eddy Current Testing – ET: Eddy-current inspection uses  electromagnetic induction  to detect flaws in  conductive  materials. A circular coil carrying current is placed in proximity to the test specimen (electrically conductive). The alternating current in the coil generates changing magnetic field which interacts with test specimen and generates eddy current. The  term eddy current  (also called Foucault currents) comes from analogous currents seen in   water  where localized areas of turbulence  known as eddies  give rise to persistent vortices. When alternating current is applied to the conductor, such as copper wire, a magnetic field develops in and around the conductor. Variations in the electrical conductivity or magnetic permeability of the test object, or the presence of any flaws, will cause a change in eddy current. A corresponding change in the phase ...

  Non destructive Testing (NDT)- Common Methods are: Visual Inspection – VT Liquid Penetrant Testing – LT Magnetic Particle Testing – MT Radiographic Testing – RT Ultrasonic Testing – UT 1.   Visual Inspection – VT: Visual inspection after welding is very useful in evaluating quality, even if other testing methods are to be employed. As welding progresses, surface flaws such as cracks, porosity, and unfilled craters can be detected only by Visual Inspections, leading to repairs or rejection of the work. Welds must be cleaned from slag to make inspection for surface flaws possible. A  10x magnifying glass  is helpful in detecting fine cracks and other faults. As indicated before, a  borescope and dental mirrors , are useful for inspection inside vessels, pipe, or confined areas. Visual inspection  is the most popular and the most widely used of the non-destructive inspection techniques. Completed welds should be checked according to the plans and the sp...

  Equipments and materials for NDT lab set up Radiography Testing: 1) X-Ray tube head -450 kV capacity ( only if construction of a exposure room with approval from government is possible) 2) RT Films (D4 ) 3) lead screen 0.125mm, 0.25 mm 4) Film casettes 5) set of IQI -wire type and hole type, ASTM standards and ISO standard, 6) Lead letters , alphabets and numbers 7) RT weld Film viewers (with intensity control ) 8) Set of developed films 9) Film Densitometer 10 ) Dark room set up for developing, with seperate tenks for Developer, Stoper, Fixer & Rinsing ( only if required) Computed Radiography: Phosphor plate with lead screens and casette CR Scanner and Computer Digital Radiography: Requires a Fixed Digital Radiography Machine Inbuilt X-Ray tube of capacity 150kV upto 400 kV Inbuilt sample positioning system Flat panel detector External control console Computer. ( There are local manufacturers for Digital XRay machine ) Magnetic Particle Testing (MPI): 1) MPI Electromagnetic ...

 ›Penetrant Testing is one of the effective method for detecting surface flaws,. ›It can be used on Metals, non-metals, plastics, ceramics & Glass. ›Not suitable for Porous materials such as wood, bricks, concrete, & other non graded castings, sponge Qualification of Examination Personel ›Able to read a Jaeger Type No. 2 Standard Chart at a distance of not less than 12 in. (300 mm), ›Should be capable of distinguishing and differentiating contrast between colors used. ›These requirements shall be checked annually. ›Should clear the Examinations with percentage stated in ASNT SNT-TC-1A Basic Principle ›Capillary Action – Low surface tension fluid( dye) penetrates in to clean and dry defects open to the surface. Advantages of PT ›High sensitivity to small surface discontinuities. ›Vast application -metallic and nonmetallic, magnetic and nonmagnetic, and conductive and nonconductive materials may be inspected. ›Large areas and large volumes of parts/materia...

 Non Destructive Testing , NDT , is industrial method for analyzing the characteristics of material or finding the discontinuities in the material & Weld joints, without damaging the material. NDT is otherwise called as, Non Destructive Evaluation –NDE, Non Destructive Inspection (NDI) and it a quantitative analysis method. Whereas Destructive Testing is a Qualitative analysis method, to find the quality of the material such as Tensile strength, Elongation property, hardness value, Impact toughness, etc The above mentioned qualitative properties cannot be found using NDT methods. This is  because in order to find the mechanical properties, it is required to apply load on the material. The load deforms the material  making them not usable. But NDT Methods are used in such a manner, that the material can be reused after the testing. This area answer some of the FAQ Frequently asked Questions What is NDT? What is the use of NDT? What is Difference betw...

  Non Destructive Testing  (NDT): NDT is industrial method for analyzing the characteristics of material or finding the discontinuities in the material & Weld joints, without damaging the material. NDT is otherwise called as, Non Destructive Evaluation –NDE. Non Destructive Inspection (NDI) and it a quantitative analysis method.   Destructive Testing : Destructive Testing is a Qualitative analysis method, to find the quality of the material such as Tensile strength, Elongation property, hardness value, Impact toughness, etc. The above mentioned qualitative properties cannot be found using NDT methods. Because in order to find the mechanical properties, it is required to apply load on the material. The load deforms the material making them not usable. But NDT Methods are used in such a manner, that the material can be reused after the testing. Few of the NDT Methods which are used in industries for Defect detection in materials are given below: Ultra...

  Ultrasonic Testing Ultrasonic Testing utilizes high frequency sound waves which are not audible to human ears. The Ultrasonic sound waves are used for measurements of thickness of any material. General frequency used in ultrasonic thickness measurements probe is 5 Mega Hertz and above. The probe is placed over the material surface with a liquid or gel spread over the surface. The liquid may be water, oil or gel, which acts as couplant and the couplant eliminates air gap between probe and material. Sound from the probe travels throughout the material and reflects back when it meets the end of the material.  When it meets another material with a different acoustic property, by having the time taken by sound to travel to end and return back the machine calculates accurately the thickness of the material. The technology is very useful to measure thickness of complex profiles and hollow sections, where there is no access on the inner side of the sec...