A device for cleaning and doping (lubrication) equipment for threads of the type used to join pipes to a pipe string, especially in connection with petroleum production, where cleaning fluid and dope (lubricant) are sprayed at the threads at relatively high pressure from at least one nozzle mounted in the rotatable make-up section of a power tong, and where at least one injection pump arranged to supply cleaning fluid or dope to the at least one nozzle is located in the rotatable make-up section.
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