Title:
鋼管の品質特性および品質特異性を圧力検査により検査するための方法
Document Type and Number:
Japanese Patent JP4404905
Kind Code:
B2
Abstract:
In a process to modify the characteristics of a steel pipe (1) subsequently used for a gas pipeline, the pipe is subjected to a water pressure test in which it is simultaneously subject to limited flexing action. During the test, an additional volume of water (12) is introduced in addition to that specified in accordance with DIN EN 10208 Part 2. The supplementary water volume is introduced progressively for a period of from 2 to 3 minutes, causing the pipe to expand by 0.2 to 0.3 percent. The treated pipe is subsequently used for the production of a spirally welded pipe.
Inventors:
Tomara Siegfried
Schmek Franz Josef
Deracamp Hans Joachim
Schmek Franz Josef
Deracamp Hans Joachim
Application Number:
JP2006535957A
Publication Date:
January 27, 2010
Filing Date:
August 13, 2004
Export Citation:
Assignee:
Eisen und Metalwerke Ferndorf Game Behr
International Classes:
G01N3/12; B21D3/14; B21D26/02; G01M3/28
Domestic Patent References:
| JP9089739A | ||||
| JP58151913A | ||||
| JP61227126A | ||||
| JP61017323A |
Attorney, Agent or Firm:
Fujita Akira