Professional Helium Leak Testing Services in the UAE
Helium leak testing is a highly sensitive method that detects extremely small leaks which conventional pressure tests cannot find. Because helium has a very small molecular size, it escapes through microscopic defects, allowing leaks to be located and quantified before commissioning.
As a provider of helium leak testing services in the UAE, Tensor delivers helium and nitrogen-helium (N2/He) leak detection for oil and gas, marine, and industrial clients. This guide explains how it works, the methods used, and where it fits in pre-commissioning.
What Is Helium Leak Testing?
Helium leak testing introduces helium (often as a 1% trace in nitrogen) into or around a system and uses a helium mass spectrometer to detect helium escaping through leak paths. It is far more sensitive than bubble or pressure-drop testing and can both find the location of a leak and measure its rate, giving a quantifiable result that confirms system tightness.
Why Use Helium for Leak Detection?
Helium is inert, non-toxic, and present in air at only a trace level, so any helium detected by the instrument indicates a genuine leak. Its small atomic size lets it pass through defects too small for other test gases, enabling early detection of leaks before they become safety or production problems. Detecting and repairing leaks before start-up improves safety and integrity and avoids costly downtime during commissioning.
What Are the Main Helium Leak Testing Methods?
| Method | How it works |
|---|---|
| N2/He pressure test | System pressurised with ~99% nitrogen and ~1% helium; flanges taped and probed to detect and quantify leaks. |
| Sniffer (spray) probe | System pressurised with helium; a probe scans joints to locate escaping helium. |
| Vacuum method | System evacuated and helium applied externally; the spectrometer detects helium drawn in through leaks. |
In the nitrogen-helium method, all potential leak paths such as flanges and seals are taped so escaping gas is captured, then the tape is probed with the mass spectrometer to identify and measure each leak.
Where Is Helium Leak Testing Used?
- Final tightness testing of process and hydrocarbon piping before start-up.
- Skids, packaged systems, valves, and pressure equipment.
- Systems where water cannot be used for testing.
- Critical refinery and gas-processing lines requiring high integrity.
How Does Helium Leak Testing Fit Pre-Commissioning?
Helium leak testing is part of the mechanical completion process and is performed after strength testing and reinstatement. It simulates near-live conditions to confirm the system is leak-tight before hydrocarbons are introduced. It complements, rather than replaces, high pressure testing, which proves strength, and it is distinct from nitrogen purging, which makes a system inert and dry.
Helium Leak Testing Services in the UAE
Tensor provides helium and nitrogen-helium leak testing across the UAE using calibrated mass-spectrometer equipment, ISO-compliant procedures, and full reporting of detected and quantified leaks. As part of a complete pre-commissioning package, we combine leak testing with cleaning, flushing, purging, and pressure testing through a single provider.
Request a quote for helium leak testing, or explore our full Pre-Commissioning Services.
FAQs
Helium leak testing is a highly sensitive method that uses helium and a mass spectrometer to detect very small leaks that conventional pressure tests miss. Helium’s small molecular size lets it escape through microscopic defects, allowing leaks to be located and quantified.
Helium is inert, non-toxic, and present in air only as a trace, so any detected helium indicates a real leak. Its small atomic size lets it pass through tiny defects, making it far more sensitive than bubble or pressure-drop testing.
N2/He leak testing pressurises a system with a mixture of about 99% nitrogen and 1% helium. Flanges and joints are taped and then probed with a mass spectrometer so leaks can be both detected and quantified under near-live conditions.
No. High pressure testing proves a system’s strength and finds gross leaks, while helium leak testing detects and quantifies microscopic leaks. They are complementary steps performed at different stages of mechanical completion.
It is performed during pre-commissioning, after strength testing and reinstatement, as a final confirmation that the system is leak-tight before hydrocarbons are introduced at start-up.
Tensor provides helium and nitrogen-helium leak testing across the UAE using calibrated mass-spectrometer equipment and full reporting, as part of a complete pre-commissioning package.
