Our nitrogen lines inspection and monitoring program

Inside the GFE Division, which is operating in the environmental inspections field, we have developed a nitrogen loss control program finalized to reduce uncontrolled loss costs.

For every identified line, we realize a photographic census. It allows us to organize every single source and to identify it with a numeral tag on its picture.

NitroSave - Component identification code
In the picture, you can also find the device references. We relate images to source data records (diameter, fluid composition, and characterization, phase) to create a complete sources archive.

Analyzed components are:

  • Mixers (Capacity seal)
  • Compressors (capacity seal)
  • Connectors (threaded type)
  • Thin line
  • Flanges
  • Tanks
  • Valves
  • Safety valves.

After identifying, characterizing and organizing every source, our specialized technicians do the inspections. They use portable instruments to identify possible nitrogen losses.

We can identify every kind of loss:

  • Accessible components Outside loss
  • inaccessible components outside loss (border lines, on rack, etc..)
  • pulmonary system tank loss
  • intercept through valve inner leaks loss.

BAT: we use the best technologies on the market to identify every loss.

External accessible sources losses

We examine all the accessible sources through portable TCD. This instrument can find ppmv (parts per million) losses. The inspection is made according to EPA 21 protocol.

External accessible sources losses
Inorganic monitoring instruments, like H2, SO2: portable TCD (Thermal Conductivity Detector) with a 0-800.000 ppmv range.
Strumento TCD - Ispezioni Azoto

External inaccessible sources losses

In case of inaccessible sources, we inspect using ultrasound detector with directional parabolic microphone. It can detect losses with extreme precision from a safe distance.

Pulmonary tanks system losses

The primary Nitrogen use, in the petrochemical field, is originated by fixed roof pulmonary tanks system. These tanks represent a possible loss source, and they need to be carefully monitored.

Our program includes a complete characterization and inspection that starts with remote monitoring, using OGI technology and ultrasounds.

We pay particular attention to breathing valves and their operations.

Termocamera ispezione linee d'azoto

When we identify a breathing pipe loss, we examine and find loss origin and entity. We use the best technologies on the market.

Internal through valve leaks loss

Trafilamenti delle vavole - Ispezioni linee di azoto

Another possible loss source is represented by internal through-valve-leaks that constantly consume Nitrogen.

Thanks to proper instruments and ultrasound, we evaluate the through valve leaks range. It usually originates between seat and plug.

More than 40 years of Ved experience in onsite maintenance and Nitrosave service let us provide a 360° support to industrial plants.

Here are some of our services:

  • on site valves revision
  • off site valves revision
  • on site valves repacking
  • safety valves in site calibration
  • on pressure line intervention: line stop implementation.

Our NSS dedicated software has been developed and thought for an automatic management of the inspection program. It helps you to interact with all the data and processes involved and gives you a powerful instrument to optimize maintenance. Thanks to this software, you can do more easily and quickly, different operations:

  • quick sources research– through the use of multiple filters, a punctual sources research is possible.
  • critical sources – with this dedicated window you can do a quick key sources research
  • archive – It is possible to visualize and extract the archive of every maintenance operation and monitoring.
  • Emission trend
  • Pdf and Excel data exportation.

Software di gestione dati - NitroSave Ispezione linee di azoto

We report every program stage.

We create daily report for every program stage. 

Census: photo book containing all the sources and the recorded info

Loss detection: off limit report in pdf and excel format

Tanks inspection: inspection report according to NTA 8399_2015

Monitoring campaign: eventual loss evaluation report.

NitroSave - Report - Ispezione linee di Azoto


Nitrogen is a clean, dry and inert gas used to remove oxygen from products or processes in a significant industrial sector.

In the oil industry, nitrogen is used to create a low oxygen level environment, to prevent fires and explosions.

This gas can be used in several processes, such as:

  • Seal clean up of Inflammable gas compressor
  • Pipes clean up
  • Tanks Inerting and conditioning
  • Flaring system cleansing
  • Pressurization well mouths
  • Catalytic reactor clean up.


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