Non-Destructive Testing & Inspection Services in Chennai
Comprehensive quality verification, defect detection, and structural integrity assessment for welded fabrications, castings, forgings, pressure vessels, and in-service piping.
Conventional Non-Destructive Testing Methods
Field-tested testing methods deployed by ASNT Level II certified inspectors across Chennai and Tamil Nadu fabrication facilities.
Ultrasonic Testing
Ultrasonic Testing & Thickness Gauging (UT)
High-frequency acoustic wave inspection for detecting internal volumetric flaws, laminar discontinuities, and accurate residual wall thickness measurement in Chennai.
- Full-penetration welded joints in structural steel, piping, and pressure vessels
- Boiler tube thickness surveys and oxide scale evaluation
- Steel forgings, shafts, gears, and heavy machinery castings
- Plate lamination checks and structural raw material verification
- In-service wall loss mapping and corrosion screening for pipelines
Magnetic Particle Testing
Magnetic Particle Testing (MPT/MPI)
Fast, sensitive surface and near-surface flaw detection in ferromagnetic materials using visible black and fluorescent magnetic media in Chennai.
- Full-penetration welded seams & heat-affected zones (HAZ)
- Forged crankshafts, gears, turbine components & connecting rods
- Machined high-tensile fasteners, bolts & structural pins
- In-service crane hooks, lifting lugs & mobile equipment shackles
- Steel foundry castings for shrinkage cracks, tears & inclusions
Liquid Penetrant Testing
Liquid / Dye Penetrant Testing (DPT/LPT)
Highly sensitive capillary method for revealing surface-breaking cracks, porosity, and laps in non-porous metals and alloys in Chennai.
- Austenitic stainless steel, duplex steel & titanium welded joints
- Aluminum, copper & bronze alloy castings and machinings
- High-pressure valve bodies, flanges & pump casings
- In-service clad piping, chemical reactor tanks & heat exchangers
- Precision machined threads, seals & bearing surfaces
Radiography Testing
Industrial Radiography Testing (RT)
Volumetric internal inspection using X-ray or gamma radiation to produce permanent radiographic film records of weld integrity and internal structure in Chennai.
- High-pressure steam piping & cross-country pipeline girth welds
- Boiler drum longitudinal & circumferential seams
- Heavy alloy castings for internal shrinkage, tears & core gas voids
- Pressure vessel nozzle attachments & manifold headers
Visual Testing
Visual Inspection & Examination (VT)
Primary baseline inspection evaluating weld dimensions, surface condition, alignment, fit-up, and mechanical damage in Chennai.
- Structural steel fabrication, truss assemblies & PEB columns
- Pipe joint fit-up, root pass & completed weld profiles
- Pressure vessel nozzle attachments, flange bolting & gasket seating
- In-service storage tank corrosion, distortion & paint condition audits
Positive Material Identification
Positive Material Identification (PMI / XRF)
Rapid, on-site alloy grade verification and elemental chemical screening using handheld X-ray Fluorescence (XRF) analyzers in Chennai.
- Stainless steel grades: 304/304L, 316/316L, 317L, 321, 347, 904L
- Duplex & Super Duplex alloys: UNS S31803 / S32205 / S32750
- Nickel alloys: Inconel 625, 825, Monel 400, Hastelloy C276
- Low alloy steels: P11, P22, P91, P92 creep-resistant grades
Eddy Current Testing
Eddy Current Testing (ECT / ET)
Electromagnetic induction testing for surface and sub-surface flaw detection, conductivity measurement, and metal sorting in conductive materials in Chennai.
- Surface crack detection through paint and coatings on welded structures
- Condenser, chiller, and heat exchanger non-ferrous tubing inspection
- Aircraft structural bolt holes, fastener locations, and turbine blade roots
- Alloy grade segregation and electrical conductivity sorting (% IACS)
- Automotive component hardness and heat-treatment validation
Advanced NDT Inspection Methods
Computerized multi-beam scanning, high-precision diffraction flaw sizing, and long-range guided wave screening.
Phased Array Ultrasonic Testing
Phased Array Ultrasonic Testing (PAUT)
Advanced multi-element ultrasonic inspection capable of electronic beam steering, sectorial scanning, and high-resolution flaw imaging in Chennai.
- Heavy-wall pressure vessel longitudinal & girth welds
- Clad overlay bonding & stainless weld overlay thickness
- Turbine rotor shafts, generator retaining rings & blade attachments
- High-pressure steam piping & structural offshore jacket nodes
Time of Flight Diffraction
Time of Flight Diffraction (TOFD)
Accurate diffraction-based ultrasonic method for precise vertical flaw sizing and rapid volumetric weld screening in Chennai.
- Thick plate & pressure vessel circumferential and longitudinal seams
- In-service crack growth monitoring & remaining life assessments
- Rapid plant shutdown weld verification & turnaround screening
- Pre-service baseline scanning of critical heavy engineering hardware
Tube Inspection Techniques
Heat Exchanger & Boiler Tube Inspection
Specialized electromagnetic and acoustic internal tube inspection for condensers, heat exchangers, chillers, and boiler tubing in Chennai.
- Power plant steam surface condensers & chiller bundles
- Refinery shell-and-tube heat exchangers & reboilers
- Thermal boiler water-wall, economizer & superheater tubes
- Chemical plant jacketed reaction tubes & condensers
Long Range Ultrasonic Testing
Long Range Ultrasonic Testing (LRUT / Guided Waves)
Screening long pipeline sections from a single test point using low-frequency guided ultrasonic waves to identify corrosion under insulation in Chennai.
- Insulated steam and hydrocarbon process lines prone to CUI
- Underground road, railway, and river crossing pipe sections
- Offshore marine platform risers & jetty piping networks
- Soil-to-air transition interfaces & pipe support touch points
Remote Visual Inspection
Remote Visual Inspection & Videoscopy (RVI)
High-definition articulating videoscopic inspection of inaccessible internal piping, turbine interiors, valves, and enclosed cavities in Chennai.
- Internal boiler headers, superheater tubes & steam lines
- Gas turbine combustors, compressor stages & generator internals
- High-purity pharmaceutical stainless orbital weld roots
- Nuclear reactor vessel internals & control rod drive housings
Rapid On-Site Mobilization for Plant Shutdowns & OEM Projects
Our certified ASNT Level II and Level III inspectors mobilize across Tamil Nadu with calibrated digital flaw detectors, yokes, and safety induction clearance for heavy industrial turnarounds, wind farms, and fabrication yards.
Components & Systems We Inspect
From raw stock verification to in-service turnaround monitoring, our inspectors mobilize with calibrated digital instruments.
Welded Fabrication
Full-penetration butt welds, fillet joints, structural connections, and nozzle attachment welds.
Forgings & Castings
Turbine rotors, heavy gear blanks, valve castings, and machined shafts examined for internal shrinkage and bursts.
Boilers & Vessels
Boiler tube thickness mapping, oxide scale measurement, pressure vessel longitudinal seams, and tank floor MFL.
Pipelines & Tubes
Heat exchanger tube bundles, insulated cross-country lines, and alloy piping alloy verification.
NDT Testing FAQs
Frequently asked technical questions regarding testing procedures, technician qualifications, and mobilization in Chennai.
NP Technical Services Pvt. Ltd. provides comprehensive Non-Destructive Testing services across Chennai and our operational branches in Madurai, Coimbatore, and Hosur including Conventional NDT (Visual Testing, Liquid Penetrant Testing, Magnetic Particle Testing, Ultrasonic Testing, Radiography Testing, PMI, Eddy Current Testing, Portable Hardness Testing, and In-Situ Metallography) and Advanced NDT (PAUT, TOFD, Tube Inspection, LRUT, Tank Floor MFL, and Remote Visual Inspection).
The conventional NDT methods provided in Chennai include Visual Testing (VT), Dye / Liquid Penetrant Testing (DPT/LPT), Magnetic Particle Testing (MPT), Ultrasonic Testing (UT), Radiography Testing (RT), Positive Material Identification (PMI), Eddy Current Testing (ECT), Portable Hardness Testing, and In-Situ Metallography.
NP Tech supports advanced non-destructive inspection methods in Chennai including Phased Array Ultrasonic Testing (PAUT), Time of Flight Diffraction (TOFD), Heat Exchanger Tube Inspection Techniques, Long Range Ultrasonic Testing (LRUT / Guided Waves), Tank Floor Magnetic Flux Leakage (MFL), and Remote Visual Inspection (RVI / Videoscope).
Yes. NP Tech operates material testing capabilities in Chennai including Microstructure analysis, Ferrite content measurement, Grain size determination, Inclusion rating, Macrostructure examination, Hardness testing (Brinell, Rockwell & Vickers Microhardness), Tensile testing, Impact testing, Chemical analysis, Failure analysis, and SEM/EDAX examination.
Schedule an NDT Inspection in Chennai
Submit component drawings or testing requirements. Our certified Level II/III inspectors can mobilize to your project site or fabrication shop.