| 摘要 |
<p>PURPOSE:To provide a silencing pipe previously processed so as to suppress flow noise of water even when water is flowed through the pipe. CONSTITUTION:A silencing pipe is constructed with at least three layers, an inner layer consisting of a hard resin tube 1, a middle layer consisting of a resin sheet 2 containing inorganic powder and an outer layer consisting of a metallic pipe 3, and the metallic pipe is manufactured by drawing process to unite the three layers. Or, an air layer, a foamed resin layer or a glass wool layer may be inserted between the inner layer and the middle layer or the middle layer and the outer layer together with rings.</p> |
