发明名称 |
PROCESS FOR MANUFACTURING COMPOSITE PIPES |
摘要 |
<p>Improved composite pipes are proposed which comprise an outer pipe made of plastic and a thin lead layer on the inner wall of the outer pipe. The lead layer is formed by arranging a lead pipe in the outer pipe and expanding it by use of pressure medium into close contact with the inner wall of the outer pipe. The outer pipe may be circular or square or double-path. A process for producing the composite pipes is also proposed.</p> |
申请公布号 |
DE3666620(D1) |
申请公布日期 |
1989.11.30 |
申请号 |
DE19863666620 |
申请日期 |
1986.02.21 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES LIMITED |
发明人 |
HATA, RYOSUKE C/O OSAKA WORKS OF SUMITOMO |
分类号 |
B32B15/08;B21D49/00;B32B15/10;F16L9/14;F16L58/10;(IPC1-7):F16L9/14;F16L9/18;B29D23/00;F16L59/14;F16L58/02 |
主分类号 |
B32B15/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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