For more than fifty years CCTV inspection has been used to inspect the internal condition of culverts, pipelines and drains. Pipe line inspection, using a CCTV camera system, is limited in its ability to measure size, defects, anomalies, and deformation. The release of ASTM F3080-14 provides engineers, inspectors and authorities with an internationally accepted procedure for the measurement and/or confirming of installed pipe size and/or shape deformation.
F3080 ““ 14 Standard incorporates a 360 degree, non-rotating laser light ring projected onto the interior surface of a pipe or drainage structure. The narrow laser ring of light conforms to the true and existing internal shape, regardless of that shape. Each laser Image is captured and recorded using a CCTV color pipeline inspection system with video recorder as the CCTV camera with laser projector, moves through the line.
The recorded inspection image data is moved to a computer were proven, highly accurate machine vision programs and algorithms are used to process each video image (30 frames per second NTSC, 25 frames per second PAL). The processing software generates the center of each video image, performs and stores 1080 radial measurements per image. Using this radial data, multiple reports can be generated, viewed and printed. Reports can include Ovality, True Diameter, X-Y Diameter, Capacity, and 3D Modeling. Manual measurements can also be performed on any individual image. Manual measurements may include water level, debris level, joint gap, deformation etc. To confirm accuracy, a match to reference image is provided on each survey. The “match to reference image” is generated from two independent data files. Image one is generated solely from the alpha numeric insertion of pipe shape and diameter. Image two is generated solely from the software processed laser measurement data. The images must match and overlay each other for “accuracy of survey” confirmation.
About ASTM International:
Headquartered in West Conshohocken, PA, ASTM was founded in 1898 as the American Section of the International Association for Testing and Materials, predating other standards-making societies Including BSI (1901), DIN (1917, ANSI (1918) and AFNOR (1926). Today, ASTM is an International Standards Organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems and services, and has emerged as the dominant rule-making society among standards developers, and represents the largest developer of standards in the world.
