Method for cleaning and sanitizing the interior of pipelines.

摘要

Pipeline interiors are treated by passing through said pipeline an aqueous gelled pig containing an aqueous, cross-linked gelled galactomannan gum, or derivative thereof. A bactericide may optionally be included in the gelled pig to sanitize the interior of the pipe. The interior surface of a pipeline may optionally be dried by sequentially passing through the pipeline an aqueous cross-linked gelled pig, a fluid mobility buffer comprising a non-cross-linked gelled alkanol of from one to three carbon atoms, and a dessicating amount of a liquid alkanol from one to three carbon atoms.