Optical Inspection Technologies Optical inspection technologies are characterized by non-contact operation and high precision, encompassing machine vision, laser scanning, and distributed fiber optic sensing (DFOS). As an independent third party, it can support in advising and verifying these technologies according to international standards and guidelines. DNV is a leader in verifying distributed. designs for use in outdoor applications. In North America, the American National Standards Institute (ANSI) and the Insulated Cable Engineers Association (ICEA) have jointly published multiple standards that defi optical cable performance requirements. The ANSI/ICEA S-87-640 “Standard for Optical. Pipeline transportation is a cost-effective and secure method for transporting flammable and explosive oil and gas over long distances, with low initial investment and transportation costs, as well as environmental benefits. According to the National Development and Reform Commission's plan, the. This paper systematically reviews the domestic and international research status of pipeline in-line inspection (ILI) technologies, with a focus on four major technological systems: electromagnetic, acoustic, optical, and robotic technologies. The operational principles, application scenarios. The United Stated Environmental Protection Agency (US EPA) defines pipe condition assessment as, “The collection of data and information through direct inspection, observation and investigation and in-direct monitoring and reporting, and the analysis of the data and information to make a. Distributed Acoustic Sensing (DAS) technologies, Distributed Temperature Sensing (DTS) and Distributed Temperature & Strain Sensing (DTSS) provide pipeline operators with a monitoring solution to reduce downtimes, enhance safety, achieve regulatory compliance, and protect valuable assets.