Pipeline treatment apparatus

摘要: Apparatus for treating the internal wall of a pipeline by scraping, cleaning, painting or like, including an elongated pig, mounting assembly connected to trailing end rollers movably supported on rotational movement around longitudinal axis radial relative and canting in which each roller can be selectively skewed with respect chord diametric cross-section apparatus is located, pig coinciding pipeline. Resilient biasing means provided constantly urging radially outwardly pig. A plurality spaced surface elements are rotatably carried rotation about