Pig and method for cleaning tubes

Details Pig and method for cleaning tubes Pig and method for cleaning tubes

B - Operations, Transporting

08

B

B08B 9/043 (2006.01) B08B 13/00 (2006.01) F16L 55/40 (2006.01) F16L 55/44 (2006.01) F16L 55/46 (2006.01) F28G 1/12 (2006.01) F28G 15/04 (2006.01)

Patent

CA 2587094

A method of cleaning tubing in an operating heater, in which the tubing has an inlet and an outlet. While the heater is in operation, a hollow, metallic and/or tubular mesh pig is run through the tubing from the inlet to the outlet. Cleaning should be done before contaminant has hardened. An improved pipe pig, preferably hollow, metallic and/or made from tubular mesh, has scraping edges made from longitudinal edges of a wire. The tubular mesh may be a knit, weave or may be knotted. The pig is preferably radially expandable up to twice its fully compressed radius, and may have an expander to force it radially outward. The pipe pig is preferably made of a resilient wire having a polygonal cross-section.

Méthode de nettoyage de tubes dans un appareil de chauffage en fonctionnement, où le tubage comporte un orifice d'entrée et un orifice de sortie. Lorsque l'appareil de chauffage fonctionne, un racleur métallique creux et/ou tubulaire traverse le tubage de l'orifice d'entrée à l'orifice de sortie. Le nettoyage devrait être effectué avant qu'un agent contaminant ait durci. Un racleur de tubes métallique, préférablement creux et/ou fabriqué de toile métallique tubulaire, comporte des grattoirs fabriqués de bouts longitudinaux d'un fil d'acier. La toile métallique peut être maillée, tissée ou nouée. Le racleur est, de préférence, expansible de manière radiale, allant jusqu'à un rayon correspondant ou double de son rayon lorsqu'il est entièrement comprimé, et peut être muni d'un agrandisseur de diamètre pour l'agrandir de manière radiale. Le racleur de tubes est de préférence fabriqué d'un fil d'acier résistant à coupe polygonale.

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