Ultrasonic Thickness Gauging Service in Bangalore | NABL Lab

Ultrasonic Thickness Gauging Services. NABL Accredited Lab.

NDT Level II Certified Technicians. In-house ASNT Level III Ultrasonic Experts.

Ultrasonic Thickness Testing for Corrosion. Chimneys, Pipelines, Tanks, Boiler Parts.

Ultrasonic Thickness Gauging Service in Bangalore. NABL Accredited Lab. Onsite Corrosion mapping of pipelines, chimneys, boiler tubes.

When a boiler pipe fails without warning, the cost isn’t just the repair — it’s the unplanned shutdown, the lost production hours, and the safety incident investigation that follows. At Trinity NDT, we prevent that situation.

We are Bangalore’s most established NABL-accredited NDT lab for ultrasonic thickness gauging — measuring the remaining wall thickness of your pipes, chimneys, pressure vessels, and tanks before corrosion reaches a critical level. Our ASNT Level III certified experts use Olympus 39DL Plus digital gauges that measure to an accuracy of 0.001mm, and we bring the equipment directly to your plant site across Bangalore, Hosur, and Mysore. With prior information, we can serve anywhere in India.

Since 2001, over 1,500+ clients — including GAIL India, HAL, BEL, Siemens, and GE — have trusted us to keep their critical infrastructure safe and compliant.

Experience our award winning Ultrasonic thickness testing services today. Just a phone call/WhatsApp call to connect with us.

Chimney Wall Thickness Testing — Corrosion Monitoring for Power Plants

An industrial chimney standing 100 metres above a power plant looks solid from the outside. Inside, the story is very different. Every time hot exhaust gases and combustion byproducts travel up the flue, they deposit acidic salts and moisture on the inner wall. Over months and years, that acidic environment attacks the steel or concrete shell from within — and because it’s happening on the inside surface of a sealed structure, the only way to catch it before it becomes dangerous is with ultrasonic wall thickness measurement.

Trinity NDT has carried out chimney inspection projects for power plants, cement plants, and process industries across Karnataka. Here’s what the process looks like:

Our team identifies inspection zones based on the chimney’s operating history and previous inspection records
We mark specific measurement grid points on the outer wall surface
Each point is surface-prepped (light cleaning) to ensure acoustic coupling
The Olympus gauge takes a reading, which is recorded and referenced against the original design thickness
Areas showing significant thinning are flagged for priority maintenance or repair
The final report maps remaining thickness across the entire inspection grid, giving your team a clear picture of residual service life

The client arranges scaffolding or rope access to the inspection elevations — our team manages everything from that point. We can work during planned maintenance shutdowns or, in many cases, while the chimney continues to operate.

Why Bangalore's Leading Industries Choose Trinity NDT for UTG

There’s no shortage of NDT vendors in Bangalore. What separates Trinity NDT is the combination of credentials, equipment, and genuine engineering depth that most labs simply can’t match:

NABL ISO/IEC 17025 Accreditation: Our UTG services are covered under formal NABL accreditation — every report we issue is government-recognised and acceptable to statutory authorities and insurance bodies.
ASNT Level III In-House Expert: Every inspection result is reviewed by an in-house ASNT Level III specialist before the final report is issued. This isn’t outsourced oversight — it happens right here in our Peenya lab.
Olympus USA Make Equipment: We use the Olympus 39DL Plus — the industry benchmark for through-coat thickness measurement. Our probe range covers everything from standard steel pipes to high-temperature boiler components to composites.
On-Site or In-Lab, Your Choice: Bring your components to our Peenya facility, or we come to you. For fixed installations, chimneys, and large pipelines, our mobile team reaches you across Bangalore, Hosur, and Mysore.
Quotation in 2 Hours: Send us your job details on WhatsApp and we’ll have a detailed written quote back to you before the end of your working day. No chasing, no delays.

Boiler Tube Wall Thinning — Before a Small Leak Becomes a Forced Shutdown

A single leaking boiler tube stops a plant. The repair itself might take hours — but if the tube failure wasn’t anticipated, the unplanned shutdown could cost days of lost production while teams scramble to diagnose the cause, source replacement parts, and complete a safe re-start sequence. That’s an entirely avoidable situation.

Boiler tubes operate in an exceptionally harsh environment — constant exposure to high-pressure steam, hot combustion gases on the fire side, and moisture-laden air. Wall thinning is gradual and invisible until it isn’t. With UTG, we can inspect every tube in a boiler bank, not just a random sample, and produce a thickness map that shows exactly which tubes are approaching their minimum allowable wall thickness.

Our technicians calibrate the UTG equipment onsite at the start of every inspection session. We use reference blocks that fall within the expected thickness range of your components, ensuring measurements stay within the ASTM E797 tolerance of ±0.254mm. Every reading is recorded and dated, so you build a corrosion rate trend over successive inspection cycles — giving your engineering team the data they need for remaining life calculations and risk-based inspection planning.

We inspect boiler tubes, headers, drums, pressure vessels, heat exchangers, and all pressure-retaining components. If your plant operates under IBR (Indian Boiler Regulations) or ASME requirements, our inspection reports are prepared to meet those documentation standards.

Pipeline Corrosion Mapping — Protecting Your Oil, Gas, and Process Lines

Pipelines corrode from the outside due to soil conditions and weather, and from the inside due to the products they carry. Either way, the wall gets thinner — and a thin pipe wall that fails under pressure doesn’t leak slowly. For oil and gas lines, process chemical pipelines, and cooling water systems, planned thickness monitoring is the foundation of any responsible asset integrity programme.

Trinity NDT provides corrosion mapping services ranging from simple spot-check measurements at pre-defined monitoring points to comprehensive C-scan corrosion mapping that produces a colour-coded thickness map of large surface areas. Our service includes:

Spot measurement: Thickness readings at specific locations — ideal for routine monitoring programmes and trend tracking
Grid scanning: Systematic measurements across a defined area to identify corrosion hot spots
B-scan imaging: A cross-sectional view of the pipe wall that reveals thickness profiles along a scan line
C-scan corrosion mapping: A full 2D thickness map of large areas, ideal for storage tank floors, vessel shells, and long pipeline sections where uniform coverage is required

All scanning is performed with equipment and techniques covered under our NABL accreditation scope, so every report carries the same regulatory weight as an accredited laboratory test certificate.

State-of-the-Art Equipment at Our Peenya, Bangalore Facility

The quality of a UTG inspection is only as good as the equipment and the person operating it. At Trinity NDT, we’ve invested in both.

Our primary thickness gauge is the Olympus 39DL Plus — a professional-grade instrument trusted by aerospace, oil and gas, and power generation industries worldwide. Its through-coat measurement capability means we can measure accurate wall thickness without stripping paint or protective coating, saving you significant preparation time and cost. The instrument’s internal data logger records every reading with location reference, date, and calibration data — all of which flows directly into our inspection reports.

Our probe inventory covers the full range of inspection requirements:

Standard contact probes for general-purpose pipe and plate inspection
High-temperature probes rated for surfaces up to 500°C — no shutdown required for many in-service inspections
Delay-line transducers for thin-wall and precision measurement applications
Paint-brush probes for high-speed scanning over large flat areas
Small-diameter probes for measuring inside curved pipe bends and restricted geometries

We maintain calibration records for all equipment and reference standards as required by ISO/IEC 17025. Equipment calibration certificates are available on request and are routinely included with inspection reports for our regulated-industry clients.

Calibration, Reference Blocks for UTG

To ensure precise measurements, equipment need calibration. One or more reference blocks with known velocities needed to perform. Block thicknesses accurately measured, ideally falling within the range to be measured. We aim for ’round number’ thickness values rather than using miscellaneous odd values. A reference block with a thickness near the maximum of the desired range and one at minimum thickness can enhance measurement accuracy.

As a minimum, two reference standards required. One 50 – 90% of the nominal thickness to be measured. Other 110 – 150% of the nominal thickness.Standard needs to measurement mechanically or optically. NDT procedures state that the maximum tolerance for these measurements shall be one-half the tolerance permitted. Test part needs to be tested within a tolerance of +0.254mm. The thickness of the reference standards tolerance allowed +0.127mm.

If the part measurement tolerance is not specified in the NDT procedure, the reference standards should be measured within +0.127mm or one-half the instrument tolerance, whichever is greater. A test part can be used as reference standard if it meets the surface finish requirements. Two or more ares on the test part can be measured mechanically or optically.

International Standards

Every Trinity NDT ultrasonic thickness gauging inspection is performed in compliance with recognised international standards. We don’t pick the easiest standard — we follow the one most appropriate for your industry and application:

ASTM E797: Standard Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method — the benchmark US standard for manual UTG
ISO 16809:2017: Non-Destructive Testing — Ultrasonic Thickness Measurement — the international standard accepted in Europe and Asia
IBR: Indian Boiler Regulations — for boiler and pressure vessel inspections requiring statutory compliance in India
ASME: American Society of Mechanical Engineers codes, applicable to ASME-designed pressure vessels and piping systems

Our personnel qualification complies with ANSI/ASNT CP-189 and SNT-TC-1A written practices approved by our in-house ASNT Level III specialist. All technicians performing UTG inspections hold valid Level I or Level II certification. Also, ISO 9712 certification is available for our technicians serving clients who require European standard documentation.

Personnel Qualification, Certification on UTG as per ASNT SNT TC 1A Level I, II

Personnel conducting Ultrasonic thickness test shall possess qualifications aligned with nationally or internationally recognized standards.

Our technicians are qualified, certified. As per written practice approved by ASNT Level III as per ANSI/ASNT CP-189, SNT-TC-1A. ‘Trinity Institute of NDT Technology‘ offers limited certification on Ultrasonic Thickness Gauging Level II for technicians.

Materials for Ultrasonic thickness testing, Applications

Majority of engineering materials can be tested using ultrasonic thickness gauging (UTG). Metals, plastics, glass, ceramics, epoxies and composites.

Number of other applications include:

-Verifying component thickness when access to the other side is impossible

-Inspecting material loss due to wear or corrosion

-Testing material thickness with an accuracy of +0.001mm

To summarise, any material that passes ultrasonic waves can be effectively tested using digital thickness gauging machines.

Get Your Ultrasonic Thickness Gauging Quote in 2 Hours

Tell us what you need and we’ll respond the same day. Our technical manager handles every initial enquiry personally — you won’t be passed between departments or wait days for a callback.

To speed up your quotation, send us:

The type of component or structure to be inspected (boiler tube, chimney, pipeline, pressure vessel)
Approximate number of measurement points or the scan area size
Location of inspection — our lab in Peenya, or on-site at your facility
Any specific standards, codes, or documentation requirements
Your preferred inspection date or maintenance window

WhatsApp, call, or email us. We’re at Peenya Industrial Area, Bangalore — and our teams cover Hosur, Mysore, and beyond.