NDTS India was established in 2006 with a motive to build a professionally managed enterprise dedicated to the challenging field of Non-Destructive Testing (NDT) & Evaluation. Today, we are an ISO 9001:2015 certified company offering 24/7 on-site Advance NDT Services by deploying world-class equipment’s with trained manpower as per various affiliations (ASNT, ISNT, ISO etc.).
At NDTS India, we constantly endeavor to fulfil our customer’s varied inspection needs and are deeply committed towards surpassing their expectations. We value and cherish their valuable suggestions and assistance. By virtue of our focus, core competence, a committed team of professionals and our unrelenting quest for excellence, we are fully geared to meet current and future challenges.
1a. Weld Inspection by Advance Ultrasonic (PAUT & TOFD)
2b. Tube Inspection by ECT, RFET, NFT, ECA, MFL, IRIS
3c. In-Service High Temperature (up to 600⁰C) Thickness Measurement by EMAT
4d. Boiler Water Wall Tube Inspection by EMAT
5e. Corrosion Mapping / Defect Detection of Field Pipelines (4”, 6” & 8”) by Intelligent Pigging
6f. Remote Visual Inspection (RVI) by specialized Cameras
7g. Wire Rope Testing by Magnetic Flux Leakage
8h. Corrosion Under Insulation by Pulsed Eddy Current (PEC)
619 & 620, The Great Eastern Galleria Plot No. 20, Sector 4, Navi Mumbai, Nerul, India
We have experience in planning, managing and carrying out PAUT & TOFD Services. We advise and develop PAUT & TOFD procedures and have specialist scanning equipment for carrying out inspections. We also provide PAUT & TOFD inspection simultaneously which increases the probability of defect detection and measurement of length and height of the defect to a high precision. This helps in detecting and discriminating the fatigue cracks which leads to catastrophic failures.
PAUT is an advanced method of ultrasonic testing. Instead of a single element and beam, phased array uses multiple ultrasonic elements and electronic time delays to create beams by constructive and destructive interference. PAUT offers significant technical advantages for weld testing over conventional ultrasonic as the phased array beams can be steered, scanned, swept and focused electronically from a fixed probe position. Beam steering permits the selected beam angles to be optimized ultrasonically by orienting or focusing them perpendicular to the predicted discontinuities.
Source :- https://www.ndts.co.in/weld-inspection-by-advance-ultrasonic-paut-tofd/
Eddy Current Testing (ECT) works on the principle of electromagnetic induction. In ECT a probe is excited with sinusoidal alternating current to induce eddy current in an electrically conducting material such as stainless steel, aluminium etc. The change in coil impedance that arises due to distortion at regions of discontinuities and associated magnetic flux leakage is measured. This is a surface technique and can readily detect very shallow surface defect and sub-surface defects. ECT is a simple, high-speed, high sensitive, versatile and reliable NDT technique and is popularly used in many engineering industries.
Remote Field Testing (RFT) is one of the several electromagnetic testing methods commonly employed in the field of non-destructive testing. RFT may also referred to as RFEC (Remote Field Eddy Current) or RFET (Remote Field Electromagnetic Technique). RFT is primarily used to inspect ferromagnetic tubing since conventional ECT have difficulty in inspecting the full thickness of the tube wall due to the strong skin effect in ferromagnetic materials.
Near Field Testing (NFT) technology is a rapid and cost-effective solution intended specifically for fin-fan carbon-steel tubing inspection. This technology relies on a simple driver-pickup eddy current probe design providing very simple signal analysis. NFT is specifically suited to the detection of internal corrosion, erosion or pitting in carbon steel tubing. The NFT probes measure lift-off or ‘fill factor’ and convert it to amplitude-based signals. Because eddy-current penetration is limited to the inner surface of the tube, NFT probes are not affected by the fin geometry on the outside of the tube.
The conventional ECT faces major limitations with respect to detection & sizing of circumferential cracking and extent of volumetric flaws in tubular. Rotating probes is a solution but it reduces the inspection speed. Therefore Eddy Current Array (ECA) along with bobbin probe technology is the solution to perform high speed inspection in a single pass.
Magnetic Flux Leakage (MFL) uses a powerful magnets to magnetize the conductive material under test where a magnetic field is created around defects like corrosion or material loss. The magnetic field induced in the part saturates it until it can no longer hold any more flux. The flux overflows and leaks out of the pipe wall and strategically placed sensors can accurately measure the three-dimensional vector of the leakage field. Because magnetic flux leakage is a vector and that a sensor can only measure one direction, any given probe must have three sensors to accurately measure the axial, radial, and circumferential components of an MFL signal.
Internal Rotary Inspection System (IRIS) is an ultrasonic method for testing of pipes and tubes. The ultrasonic beam allows detection of metal loss from the inside and outside of the tube wall. It is a fairly sensitive technique. The sensitivity achieved will depend on tube dimensions and tube cleanliness. Both ferromagnetic and non-ferromagnetic tubes can be inspected. A three dimensional picture of the defect is obtained, thus the defect profile and its depth is provided. Interpretation of results is easier than in the other techniques
Thickness measurement at elevated temperature is a special category. Standard transducers are not designed to withstand elevated temperatures and will get damaged/destroyed due to varying thermal expansion coefficients of the materials used to construct them. Variation in material temperature affects sound velocity and accuracy of thickness measurements. We use Electro Magnetic Acoustic Transducer (EMAT) equipment without couplant to accompany this task.
We offer this service using temate TG-IS (B) which is a redesigned FST-GAGE or Fast Scanning Thickness Gage, first introduced in 1994. FST-GAGE was developed by Electric Power Research Institute (EPRI) and Babcock & Wilcox (B&W) specifically to scan boiler tubes and provide a continuous measurement of tube wall thickness.
The system works on Electro Magnetic Acoustic Transducer (EMAT) technique providing accurate thickness (with accuracy of +/- 0.127mm) readings with none or minimal tube surface preparation. The probe with integrated encoder and light indicators (for fast visual alert to the operator) is manually scanned along the boiler tube while the system records the thickness & alarms if the tube is below a pre-programmed threshold or other defect conditions are triggered. The system saves a complete record of each tube & the whole boiler for later post analysis & tracking.
Apart from detecting wall loss the system is capable of detecting hydrogen damage, pitting & caustic gouging (by measuring signal attenuation) which is not detected with conventional means. It works on carbon steel and clad tubes. Tube thickness ranges from 3.8mm to 12.7mm & the minimum tube diameter requirement is 22.2mm, the tube surface can be oxidized, rough or pitted (scale-free). The technique permits 100% inspection of the boiler instead of spot checking at up to 15cm/s of scanning speed. The boiler mapping tool permits easy visualization of boiler walls with results of inspection for fast analysis and interpretation.
We offer ultrasonic pigging (by using In-line inspection tool EasyPig™ UT) and MFL Pigging (by using In-line inspection tool EasyPig TM) services for small diameter (4”, 6” & 8”) field pipelines with the help of M/s. Intron VTD, Russia
RVI(boroscopy/Videoscopy) is used to visually inspect plant components for surface defects, general condition, degradation, blockages & foreign materials. It can be used as standalone inspection or as a complement to other NDE techniques, such as eddy current, ultrasonic or x-ray, in order to qualify unclear signals or pinpoint where a more thorough inspection is needed.
We offer a turnkey inspection solutions, whether it is inspecting high energy piping, performing a loose part retrieval or diagnosing an operational problem, we bring the right equipment to visually inspect (or retrieve) it, record it, and report it back to you.
Remote Visual Inspection (RVI) of large surface areas requires an industrial Pan, Tilt, and Zoom (PTZ) camera. The PTZ camera requires openings of 5-inches or more. It can also be submerged underwater up to 100-feet. The auxiliary lamp module provides extra lighting for extremely dark inspection environments.
We use steerable crawler to inspect pipes ranging from 8” to 48”. These crawlers are well suited for carrying out inspections on pipe systems, especially those that have a lot of bends and pipe branches. The remote pendant easily steers the crawler around multiple elbows & solid obstructions and controls the crawler’s focus, lighting, speed and pan & tilt functions. This is the most common inspection technique to inspect sewer, drain, water, electrical conduit and process lines in various industries.
Large number of ferrous steel wire ropes is in use in different industries. Premature discard and replacement with the new rope involves in unreasonable costs, while operating the rope, which already reached discard criteria, is dangerous. Visual inspection is obvious, but only visual examination is not sufficient due to specific rope design. Non-destructive magnetic inspection of ropes enables to gather comprehensive data for making reasoned decision. Magnetic flux leakage (MFL) equipment with strong magnetization can inspect ropes reliably, and smart software facilitates data interpretation.
Our rope inspection services comprise inspection of the new ropes either during production run or delivered to the customer, and on-site inspection onshore, offshore, above ground and underground. Inspection is carried in accordance with national / international standards and norms. This enables large cost savings as wire ropes can be used safely for a longer period of time.
PEC is an advance electromagnetic inspection technology which majorly detect remaining wall thickness under insulation in ferrous material. It uses square pulse signal to induced eddy current which can penetrate more deeply in magnetic material than conventional Eddy Currents. PEC can measure thickness through all insulation materials, coatings, fixed chicken wire, concrete, re-bars, corrosion product, stainless steel sheeting, aluminium sheeting, water marine growth, blistering scabs, through metallic mesh.
Mr Mukesh Arora
Managing Director & CEO
Mrs Shilpa Arora
Mr Pratik Chinchmalatpure
Mr Swanand Hatimkar
Engg. - Business Development & Marketing