LARGE-SIZE PIPE OF QUARTS GLASS, LARGE-SIZE STOCK OF QUARTS GLASS, MANUFACTURE OF PIPE AND STOCK, OPTICAL FIBER OF QUARTS GLASS Russian patent published in 1997 - IPC

FIELD: manufacture of glass products. SUBSTANCE: quartz glass pipe is manufactured by mechanically processing pipe stock of natural or synthetic quartz glass, outside diameter of pipe being 50-300 mm, outside to inside diameter ratio 1.1 to 7, wall thickness at least 10 mm, and wall thickness deviation no more than 2%. Quartz glass stock combines large-size pipe and incorporated glass rod in pipe core serving for optical fiber. Stock is manufactured via high-precision machining. Pipe diameter is controlled by heating, hot dragging, or pressure heat dragging. EFFECT: facilitated manufacturing pipe. 6 cl, 7 dwg , 5 tbl