Testing Services

N2 Pressure Testing Services

Nitrogen is an effective pressure testing medium due to its inert properties. With no extensive drying requirements like hydrotesting, nitrogen pressure testing is often more time-efficient to implement. Many operators also opt for nitrogen testing due to economic reasons, as it is less expensive than hydrostatic testing for smaller systems.  

• ASME B31.3 outlines requirements for process piping systems, including booster stations, compressor stations, and pump stations. These guidelines define acceptable test methods, minimum pressures, and safety protocols to minimize stored energy risks.  
• For transmission pipelines, ASME B31.8 establishes critical parameters for pressure verification and material strength testing and is widely referenced by PHMSA. Nitrogen pressure testing provides a safe, efficient, and compliant solution for integrity verification.  

Leveraging best-in-class equipment, regulatory know-how, and experienced crews, N2 Solutions ensures accurate, rapid testing that keeps operations on schedule and assets performing reliably. 

Testing of Post-Installation Instruments

Nitrogen/helium mixtures are used to verify the accuracy and functionality of newly installed instrumentation. This mixture performs well for several key reasons:  

• Helium’s unique properties allow for highly sensitive tracing, making it possible to detect even the smallest leaks or irregularities that could compromise measurement accuracy.  
• Nitrogen provides stability that enables operators to confirm that instruments such as pressure sensors, flow meters, and control valves are performing exactly as intended.  

N2 Solutions’ nitrogen/helium mixtures enable operators to easily verify that all components are operating within acceptable parameters. 

Leak Testing

Leak detection is performed during commissioning, maintenance, or post-repair validation to identify and locate unintended system leaks before startup or return to service. 

Using a nitrogen/helium mixture allows operators to detect even the smallest leaks present in pipelines, process piping, and facilities. Helium’s unique properties make it an ideal tracer gas, allowing for precision leak detection that other methods cannot match. When combined with nitrogen's safe pressurization properties, this approach ensures accurate results without introducing moisture into the pressure vessel. 

N2 Solutions uses precisely calibrated equipment to perform leak testing during commissioning or maintenance activities, providing operators with peace of mind during critical maintenance periods. 

Tightness Testing

Tightness testing is a formal verification process typically required during new construction—especially in LNG facilities—where systems must meet stringent containment standards prior to introducing hydrocarbons or cryogenic LNG.

Unlike general leak testing, tightness testing confirms that installed piping, vessels, and critical components meet specified allowable leak rate thresholds defined by industry codes such as ASME Section V, ASME Section VIII, and NFPA 59A.

For LNG systems operating near −260°F (−162°C), even microscopic leaks can present a significant risk. High-sensitivity helium testing is commonly specified to verify the integrity of cryogenic containment before commissioning.

N2 Solutions performs controlled, standards-aligned tightness testing to support safe startup, protect equipment, and help facilities meet required code compliance benchmarks.