| 摘要 |
<p>PURPOSE:To line the internal surface of a bent duct having large undulation, by running a pipe drawn-in wire which has pigs and contains paint between pigs through the pipe. CONSTITUTION:A paint charge opening 11 is provided tone end of a pipe 1 whose internal surface is to be lined. Then, a pipe drawn-in wire 2 having pigs 31, 32, and 33 at prescribed intervals is run through the pipe 1. Then, said pigs 31, 32, and 33 are moved from one end of the pipe to the other end. In the beginning of the movement, paint 4 is supplied from the opening 11 to between pigs, and the internal surface of the pipe 1 is coated with paint 4 between pigs through the movement of the pigs 31, 32, and 33. This method excellently lines the internal surface of a bent duct having large undulation.</p> |
