B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
B23P 15/00 (2006.01) C25F 3/24 (2006.01) F17C 1/10 (2006.01)
Patent
CA 2054103
METHOD FOR PROVIDING CONTAMINANT FREE GAS Abstract of the Invention The present invention is directed to a method for providing substantially particulate free gases by dispensing a highly pressurized gas from a carbon steel cylinder. The carbon steel cylinder is made by a process comprising the steps of forming an open ended cylinder from a billet, blank or tube of carbon steel. The side walls of the cylinder are made thicker than the desired final thickness of the cylinder side wall. One end of the cylinder is closed. The interior of the cylinder side walls is then honed to remove at least some of the excess side wall thickness. A tapered neck is then formed and tapped in the open end of the cylinder. The interior surface of the cylinder is then electropolished with a chromium rich electroplating solution to provide a surface layer with reduced iron and increased carbon and chromium on the interior surface wall of the cylinder. The cylinder may then be vacuum baked to reduce adsorbed contamination.
Bellafiore Francis V.
Farber Scott Alan
Liquid Carbonic Corporation
Macrae & Co.
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