PURPOSE: To provide a method for treating a carbon steel cylinder so that gas practically not including fine particles is supplied in distributing highly pressurized gas.
CONSTITUTION: This method includes a step of forming an open ended cylinder from a steel piece, raw material or tube of carbon steel. The side wall of the cylinder mentioned above is made thicker than the finally required thickness of the side wall of the cylinder. 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 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 absorbed contamination.
FURANSHISU BUI BERAFUIOORU