Patent ID: 7270847
Filing Date: 2007-09-18
Classification: B05C,B05D,F16L,Y10S

Abstract:
1. A method of coating an inner surface of a tube, comprising: providing a coating material in the tube; positioning a single pig device in the tube, sized and orientated to disperse the coating material along the inner service of the tube, said single pig including: a main body portion having a first end and a second end; a coating applicator disposed at said first end, said coating applicator having a plurality of longitudinally extending spaced apart ribs enabling the passage of the coating material beyond said applicator; and an end flange disposed at said second end, said end flange wiping the coating material to form a single layer coating, and motivating the pig device through the tube to apply the coating material to form said single layer coating on the inner surface of the tube.