| 摘要 |
<p>PURPOSE:To efficiently form a uniform lining film over the entire length of a long pipe, in the liquid-phase lining method for the inner surface of a pipe, by dividing an objective pipe to which lining is to be executed into a plurality of parts along its axial direction, and performing lining to these divided pipes through a pig from opposite sides to each other. CONSTITUTION:When an objective pipe P to which lining is to be executed is long, said pipe P is divided into parts P1, P2 at a graduation point S. A liquid sealing agent 1 in an amount sufficient for lining is sent into the divided pipe P1 at first, a pig 2 comprising two-throw balls having an outer diameter slightly smaller than the inner diameter of the pipe P connected with each other by a flexible string 2a is inserted, and fluid pressure such as air pressure is supplied to transfer the pig 2 along the axial direction of the pipe P. Hence, the sealing agent 1 is pushed along the arrow to form a cylindrical seal lining film 3a on the inner surface of the divided pipe P1 up to a position slightly exceeding the graduation point S. Thereafter, a liquid sealing agent 1 is sent into the remainder divided pipe P2, while leaving the pig 2 inside the pipe P. The same operation is performed along the opposite direction to form another cylindrical lining film 3b.</p> |
