979 CRAWLER HEAD
The Model 979 crawler head is exclusively designed for use with gamma radiography crawlers containing a Selenium-75 source. It is compatible with (gamma crawler specific) mechanical and electromechanical actuators.
Self propelled pipeline crawlers are inserted into pipelines with inner diameters of 3 in (7.62 cm) or greater to perform panoramic radiography of circumferential welds and the adjacent heat affected areas.
The exposure device consists of a welded stainless steel housing which contains a tungsten shield. It also serves as the Type A storage and transport packaging for the radioactive source. The beam port contains lead to shape the emergent primary beam when the source assembly is in the exposure mode.
- Key-lockable storage cover
- Stainless steel housing
- Panoramic beam with a variable width of 5° to 90°