发明名称 |
Hochdruckmetallrohr mit Anschlusskopf, Verfahren zur Bildung des Kopfes und einer Anschlussscheibe für den Anschlusskopf |
摘要 |
A connection head at a connection end of a thick wall steel pipe has an outer end face formed as a truncated cone or a truncated sphere. A lower neck portion is formed at the rear of the connection head and has a cylindrical outer surface and a taper to the outer surface of the pipe. A connection washer covers the lower neck portion of the connection head. A shallow gently sloping annular groove is produced inside the connection head as a result of a press forming. The above structure can prevent fatigue fracture due to stress concentration at the annular groove inside the head and sticking of a nut to the washer due to excessive tightening torque. |
申请公布号 |
DE10125865(B4) |
申请公布日期 |
2007.06.06 |
申请号 |
DE2001125865 |
申请日期 |
2001.05.25 |
申请人 |
USUI KOKUSAI SANGYO KAISHA LTD. |
发明人 |
KUSANAGI, RYUICHI |
分类号 |
F16L41/08;B21K21/12;F02M55/02;F16L19/025;F16L19/04 |
主分类号 |
F16L41/08 |
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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