Why Conventional Mechanical Leak Detection Methods are Ineffective\r\n\r\nDespite ongoing improvements in construction, welding, coating, and corrosion protection technology. Pipelines can still develop leaks. Although over thirty different techniques are available for use in detecting leaks, many of them have distinct handicaps in their application under field conditions. While "smart pigs" are useful for finding leaks in large diameter pipelines, they are unsuitable for small diameter lines or pipelines with varying diameter or turns.\r\n