Pillar 8 of 8 · Ultrasound Inspection Methodology
Ultrasonic Tightness Testing in Kazakhstan
📸 Photo: an inspector scanning a pipework flange joint or vessel housing from the outside with an ultrasonic sensor, while an ultrasonic signal source is placed inside
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Ultrasonic tightness testing — the eighth and final pillar of the ultrasound inspection methodology — checks the tightness of seals, vessels, and pipework in 2 minutes with no water, soap solution, or change to the working medium. The method works on a simple principle: an ultrasonic source (transmitter) generates a 40 kHz signal on one side of the joint, while a detector outside instantly responds to any breach in tightness.
The dedicated TightChecker kit from SDT includes an ultrasonic transmitter and an ultrasonic detector. It is a fully self-contained solution for testing the tightness of flanges, hatches, gearbox housings, vessels, and heat exchangers. Leak location accuracy is 1–2 cm — no need to visually inspect the entire joint.
KEG TRK is the official SDT Ultrasound Solutions distributor in Kazakhstan. We supply TightChecker and complete tightness testing solutions to oil, gas, chemical, and food industry plants across the country. Training on the ultrasonic tightness testing methodology is included with every delivery.
Applications of Ultrasonic Tightness Testing
A single TightChecker kit covers tightness control across an entire plant.
Seal and gasket inspection
Checking the tightness of flange joints, hatches, and pump mechanical seals. An ultrasonic source on one side and a detector on the other give an unambiguous result with no disassembly.
Industrial vessel testing
Checking the tightness of tanks, reactors, and heat exchangers after installation or repair. The ultrasonic method is an alternative to water or gas pressure testing for media-restricted assets.
Inspection without disassembly
Checking gearbox housings, crankcases, and protective covers right on the equipment — no need to remove or strip down assemblies to verify their tightness.
Quality control in production
Outgoing inspection of assemblies: valve seals, gearbox housings, pipework joints. A fast check of every unit on the production line without slowing the pace.
How to Perform Ultrasonic Tightness Testing
Three steps from the signal source to the inspection report.
Place the ultrasonic source
Place the ultrasonic transmitter inside the vessel, housing, or behind the flange joint. The source emits a signal at 40 kHz, which passes through any breach in tightness.
Scan with the detector outside
Slowly move the detector along the seam, gasket, or seal from the outside. A tightness breach shows up instantly as a sharp rise in the signal — both audible and numerical.
Log the location and build a report
Pinpoint the breach location and save the measurement data. The instrument automatically generates a tightness inspection report with the object, date, and result.
Benefits of Ultrasonic Tightness Testing
Speed, accuracy, and versatility for plants in Kazakhstan.
No water, soap, or tracer gas
Traditional methods (soap solution, helium pressure testing) require special preparation and are unavailable for many media. The ultrasonic method works everywhere — just a sensor and an ultrasonic source.
Testing in 2 minutes
The ultrasonic source creates a signal inside the vessel, the outside detector checks tightness around the perimeter. A full flange or housing inspection takes 2 minutes versus 30 minutes with traditional methods.
Precise leak location
The detector responds immediately to the breach point — no need to inspect the entire joint. The source of the problem is pinpointed to a specific section of the seam or gasket.
Testing in hard-to-reach places
The ultrasonic sensor is compact with a flexible probe. Flanges in tight spaces, inside structures, or in confined conditions can be checked without special scaffolding.
No restrictions on the working medium
The method works regardless of what is inside the vessel: air, gas, liquid, or vacuum. No need to change the working medium or introduce additional indicator gases.
Results documentation
Test results are stored on the instrument with a timestamp, asset ID, and operator. A tightness inspection report is generated automatically for handover and acceptance.
Need to test the tightness of your equipment?
KEG TRK specialists will help you choose the right kit for your asset types and testing conditions.
Request a consultationSDT Instruments for Tightness Testing
From the dedicated TightChecker to the professional SDT340.
TightChecker
DedicatedA dedicated tightness testing kit: detector + ultrasonic transmitter. Simple and reliable.
Recommended for: Tightness testing, no UT experience
SDT340
ProfessionalA multi-sensor platform with ultrasound and an air sensor. Comprehensive tightness testing.
Recommended for: Critical assets, documentation
SDT270
Data & trendsAn advanced detector with data logging for a tightness control program.
Recommended for: Incoming / outgoing inspection programs
SDT200
For beginnersAn entry-level detector with a transmitter to kick off a tightness control program.
Recommended for: First step, simple assets
Explore the Other Pillars of Ultrasonic Testing
The methodology covers 8 areas — one instrument handles every task.
Frequently Asked Questions About Ultrasonic Tightness Testing
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