This notice proposes deleting references to certain voluntary design and construction standards concerning cast iron, ductile iron, wrought steel, and wrought iron pipe; electric resistance welded coiled steel tubing; copper pipe and tubing; well casing, tubing and drill pipe; bronze flanges; and other materials, The references are no longer needed for safety because the materials have minimal or no usage in new gas and hazardous liquid pipelines. Deletion of references to these standards would not prevent the use of these materials in new pipelines or as replacement parts in existing pipelines if the materials meet applicable general safety requirements. This action would significantly reduce the number of voluntary standards that are now incorporated by reference in Parts 192 and 195 and the burden of keeping these references up-to-date.