The crawler is essentially a battery powered, remotely controlled mobile radiographic machine
designed to produce single wall, single image (SWSI) radiographs of circumferential welds in pipelines.
Global X-Ray & Testing Corporation offers three different models of internal pipeline
crawlers to suit different sizes of pipelines. The Model 6-14 is suitable on pipelines with internal diameters from 5.5 inches to 14 inches. The Model 10-60 is suitable on pipelines from 10 to 60 inches in diameter. The Model 22-60 can be utilized on pipelines from 22 to 72 inches in diameter.
Pipeline crawlers designed and manufactured by JME Ltd. follow the concept of modular construction to provide safe, efficient, and cost effective field units, easy to operate and maintain.
Modules are quickly and easily interchanged. All crawlers are constructed using the
highest grade materials to provide good finish, easy servicing, and extended service life. Electronics utilize military specification components, thus ensuring reliability in the harsh environments encountered
Although these crawlers are a product of the latest microprocessor technology, they are
extremely simple to operate and maintain in the field. Crawler functions may be preset to suit each particular pipeline, with full remote control being achieved from the outside of the pipeline by means of a
low powered (usually 20 millicuries Caesium) signalling isotope.
The crawlers are adjustable throughout their recommended size range by means of wheel spacers
specifically designed for use with each crawler type.