EP0375784A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Flexible fluid transport pipe
Assignee: Furukawa Electric Co Ltd
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Filing: 1989-04-27
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Granted: —
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Expires: 2009-04-27
Abstract
Abstract High-strength steel having excellent hydrogen-induced crack resistance, particularly in an environment of wet hydrogen sulfide and wires made thereof and their assembly, steel pipes, steel bands and shielding wires for marine cable are disclosed. This steel contains 0.40 to 0.70 % of C, 0.1 to 1 % of Si, 0.2 to 1 % of Mn, up to 0.025 % of P and up to 0.010 % of S, and further, if necessary, 0.008 to 0.050 % of AI and the balance of Fe and unavoidable impurities, and has a spheroidized structure. In addition, a flexible sour fluid transport pipe made of the high-strength steel band having the above- described composition and a tensile strength of 50 to 80 kg/mm 2 is also disclosed
Inventors
- 👤 Ikuo Ochiai
- 👤 Hideaki Omori
- 👤 Manjiro Sato
- 👤 Masatsugu Murao
- 👤 Kazuhiko Murao
- 👤 Hideo Chiba
- 👤 Tsuneo Okamoto
- 👤 Tadashi Fuku
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 18:44
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/04; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4439; G02B6/4459
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A high-strength steel having excellent hydrogen-induced cracking resistance, characterized in that it contains :C : 0.40 - 0.70 %, Si: 0.1 - 1 %, Mn: 0.20 - 1 %, P: Up to 0.025 %, S: Up to 0.010 %, and further, if necessary, Al: 0.008 - 0.050 % and the balance of Fe and unavoidable impurities, and has a speroidized structure.
Claim 2
Dependent Claim
61 words
A high-strength steel having excellent hydrogen-induced cracking resistance, characterized in that it contains :C : 0.40 - 0.70 %, Si: 0.1 - 1 %, Mn: 0.20 - 1 %, P: Up to 0.025 %, S: Up to 0.010 %, and further, if necessary, Al: 0.008 - 0.050 % and the balance of Fe and unavoidable impurities, and has a speroidized structure.
Claim 3
Dependent Claim
23 words
A high-strength steel wire and the assembly thereof having excellent hydrogen-induced cracking resistance made of the high-strength steel as defined in Claim (1).
Claim 4
Dependent Claim
19 words
A high-strength steel tube having excellent hydrogen-induced cracking resistance made of the high-strength steel as defined in Claim (1).
Claim 5
Dependent Claim
19 words
A high-strength steel strip having excellent hydrogen-induced cracking resistance made of the high-strength steel as defined in Claim (1).
Claim 6
Dependent Claim
22 words
A high-strength shielding wire for marine cable having excellent hydrogen-induced cracking resistance made of the high-strength steel as defined in Claim (1).
Claim 7
Dependent Claim
117 words
A flexible sour fluid transport pipe characterized in that, in the flexible fluid transport pipe comprising an inner pipe made of rubber or plastic, a metal reinforcing layer provided on said inner pipe and a plastic shell provided on said metal reinforcing layer, said metal reinforcing layer is formed from a high-strength steel strip with a tensile strength of 50 kg/mm 2 to 80 kg/mm 2 , wherein it contains C: 0.40 - 0.70 %, Si: 0.1 - 1 %, Mn: 0.2 - 1 %, P: Up to 0.025 %, S: 0.0 - 0.010 %, . and further, if necessary, Al: 0.008 - 0.050% and the balance of Fe and unavoidable impurities, and has a spheroidized structure.
Claim 8
Dependent Claim
117 words
A flexible sour fluid transport pipe characterized in that, in the flexible fluid transport pipe comprising an inner pipe made of rubber or plastic, a metal reinforcing layer provided on said inner pipe and a plastic shell provided on said metal reinforcing layer, said metal reinforcing layer is formed from a high-strength steel strip with a tensile strength of 50 kg/mm 2 to 80 kg/mm 2 , wherein it contains C: 0.40 - 0.70 %, Si: 0.1 - 1 %, Mn: 0.2 - 1 %, P: Up to 0.025 %, S: 0.0 - 0.010 %, . and further, if necessary, Al: 0.008 - 0.050% and the balance of Fe and unavoidable impurities, and has a spheroidized structure.
References Cited (Backward Citations)
No citation records indexed.
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