A visual inspection system for evaluating the interior surface of valve stems on material storage container tops
Description:
A nondestructive inspection for evaluating the interior surface of the small diameter valve stems on material storage container tops was mandated. The specifications required that the interior surface of the valve stem have a surface finish of {number sign}16 or better. Conventional methods which utilizes mechanical stylus-type''surface analyzing equipment could not extend into the narrow 0.312 inch diameter by 1.5 inch deep hole (of the valve stem). A visual inspection system which exploits th…
more
Date:
December 1, 1990
Creator:
Pickett, C.A.
Item Type:
Refine your search to only
Article
Partner:
UNT Libraries Government Documents Department