EP 0303840 B1 19911106 - VALVE BUSHING FOR THE RECEIPT OF THE GAS BOTTLE VALVE OF A PRESSURISED-GAS CONTAINER MADE FROM HIGHLY ALLOYED CHROMIUM-NICKEL STEELS
Title (en)
VALVE BUSHING FOR THE RECEIPT OF THE GAS BOTTLE VALVE OF A PRESSURISED-GAS CONTAINER MADE FROM HIGHLY ALLOYED CHROMIUM-NICKEL STEELS
Publication
Application
Priority
DE 3727326 A 19870817
Abstract (en)
[origin: EP0303840A2] Pressurised-gas containers made of high-alloy chromium-nickel steels for the storage of ultra-pure gases are cryogenically worked and electrolytically polished to improve the strength properties. The only means of access for the cleaning and the electrolytic polishing of the interior of the container is the narrow threaded opening of the valve bushing, welded in the top end (3) of the pressurised-gas container, for the gas-bottle valve (8). In order to facilitate the means of access, the valve bushing is formed from a cylindrical neck piece (6) welded into the top end and an insert (7) which is connected to the neck piece in a gas-tight and detachable manner and contains the threaded opening. Here, the inside diameter of the neck piece is greater than the diameter of the threaded opening. <IMAGE>
IPC 1-7
IPC 8 full level
F17C 13/08 (2006.01); F17C 13/00 (2006.01); F17C 13/04 (2006.01)
CPC (source: EP US)
F17C 13/002 (2013.01 - EP US); F17C 2205/0308 (2013.01 - EP US); Y10T 137/7062 (2015.04 - EP US)
Citation (examination)
US 3384133 A 19680521 - GORDON WILLIAM E
Designated contracting state (EPC)
AT FR GB IT
DOCDB simple family (publication)
EP 0303840 A2 19890222; EP 0303840 A3 19890809; EP 0303840 B1 19911106; AT E69298 T1 19911115; DE 3727326 A1 19890302; DE 3727326 C2 19911114; DE 8717878 U1 19901213; JP S6465400 A 19890310; US 4895345 A 19900123
DOCDB simple family (application)
EP 88111639 A 19880720; AT 88111639 T 19880720; DE 3727326 A 19870817; DE 8717878 U 19870817; JP 20031588 A 19880812; US 23049588 A 19880810