Non-Intrusive/On Stream Inspection Program (NII/OSI)

Seeing Beyond the Surface

Non-Intrusive/On Stream Inspection Program (NII/OSI)

Non-Intrusive/On Stream Inspection Program (NII/OSI) is a crucial technique used in non-destructive testing (NDT) to assess the integrity of industrial equipment, structures, and components without the need for disassembly or interruption of regular operations. This approach is highly valuable in various industries where safety, reliability, and efficiency are paramount.


  • Minimized Downtime: NII/OSI reduces or eliminates the need to shut down operations for inspections, leading to increased productivity and cost savings.
  • Enhanced Safety: By avoiding the need for equipment disassembly, NII/OSI reduces the risk to personnel working in hazardous environments.
  • Early Defect Detection: The continuous or periodic monitoring provided by NII/OSI allows for the early detection of defects or deterioration, preventing catastrophic failures.
  • Improved Asset Management: Regular inspections can extend the lifespan of equipment, helping organizations optimize asset management and reduce replacement costs.
  • Data-Driven Decision-Making: NII/OSI generates valuable data for predictive maintenance, enabling informed decisions about when to perform maintenance or repairs.


  • Oil and Gas: NII/OSI plays a critical role in the inspection of pipelines, offshore platforms, and refineries, ensuring the safety and reliability of these systems.
  • Power Generation: In the energy sector, NII/OSI is applied to inspect power plant components, such as boilers, turbines, and heat exchangers.
  • Aerospace: It is used to assess the structural integrity of aircraft components, including engines, wings, and landing gear.
  • Chemical and Petrochemical: NII/OSI is vital for maintaining the integrity of chemical reactors, storage tanks, and processing equipment.

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