2006-12-24 22:57:37 · 3 answers · asked by Jaber A 1 in Science & Mathematics ➔ Engineering
When a pipeline is built, inspection personnel may use visual, X-ray, magnetic particle, ultrasonic and other inspection methods to evaluate the welds and ensure that they are of high quality.
Engineers have developed devices, called pigs, that are sent through the buried pipe to perform inspections and clean the pipe. If you're standing near a pipeline, vibrations can be felt as these pigs move through the pipeline. The pigs are about the same diameter of the pipe so they range in size from small to huge. The pigs are carried through the pipe by the flow of the liquid or gas and can travel and perform inspections over very large distances. They may be put into the pipe line on one end and taken out at the other. The pigs carry a small computer to collect, store and transmit the data for analysis. In 1997, a pig set a world record when it completed a continuous inspection of the Trans Alaska crude oil pipeline, covering a distance of 1,055 km in one run.
On some pipelines it is easier to use remote visual inspection equipment to assess the condition of the pipe. Robotic crawlers of all shapes and sizes have been developed to navigate the pipe. The video signal is typically fed to a truck where an operator reviews the images and controls the robot.
2006-12-24 23:29:51 · answer #1 · answered by Som™ 6 · 0⤊ 0⤋
Main inspection is leakage and etc.
2006-12-24 23:25:06 · answer #2 · answered by M.R.Palaniappa 2 · 0⤊ 0⤋
NDT AS UT ,RT AND MT
2014-10-26 09:31:35 · answer #3 · answered by rwanm 1 · 0⤊ 0⤋