发明名称 |
New method for production of steel pipe with three layers |
摘要 |
The tube has an outer electroseamed pipe (1), an intermediate duplex-wound or electroseamed pip (3) and an inner seamless pipe (2). The pipes are lapped by drawing them together and integrated by soldering the individual lapped faces. A copper plating is applied to one or both sides of the lapped faces for use as the soldering material.
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申请公布号 |
DE19909436(A1) |
申请公布日期 |
1999.09.09 |
申请号 |
DE19991009436 |
申请日期 |
1999.03.04 |
申请人 |
USUI KOKUSAI SANGYO KAISHA LTD. |
发明人 |
USUI, MASAYOSHI |
分类号 |
F16L9/02;F02M55/02;F16L9/04;(IPC1-7):F16L9/02;F16L9/14;F16L9/18 |
主分类号 |
F16L9/02 |
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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