Pipe crawling welding device having rotatable coupled welding module, method of welding pipes with such pipe crawling device

摘要

The pipe crawl welding device has a crawler module having a propulsion unit for controllably driving the device in a longitudinal direction through a pipe. The apparatus further comprises a welding module rotatably coupled to the crawler module, the welding module having a welding head mounted thereon, wherein the welding module is configured to maintain the angular position of the welding head. With respect to the direction and the rotational speed of, it rotates automatically in the opposite direction and the same rotational speed.