Document wg8koN5ROJ26kY011xp1NKVd4

J. A. SMITH PITTSBURGH OFFICE - WPH 4 . . HS' Industrial Hygjg PLAINTIFFS , EXHIBIT AL-629 E. E. RUMBERG PITTSBURGH OFFICE - AB 749 1979 September 11 RE: ASBESTOS In reference to your letter of August 27, there are several areas of asbestos used in electrical work which are not covered. One application is high temperature wire and cable for use on smelting pots and on furnaces. We will use silicone rubber with either glass braid or a new product Rockhide for these applications. The attached memorandum and lit erature was sent to smelting electrical peopled ` -- ------------ Another application is flamemastic fireproofing material for cables in ladder. <-<} ALCOA SF<4S3 in the world of high temperature cables, there's a third reason for Rockbestos. 1918 - Rockbestos Company was formed to produce the first truly high temperature wire insulated with asbestos utilizingjhe patents of J. Allen Heaney. 1938- Rockbestos develops first high tempera ture glass fiber outer braids for smaller diameter and lighter weight coverings. 1978-Now-"Rockhides,'"a tough, outstanding, ......... abrasion resistant braiding material developed as a third choice for wire and . cable design engineers. "Rockhide" braids are an excellent alternate choice to asbestos and glass for applications up to 200= C. r v i FftOlfr \A R. L. WHITE TO MEMORANDUM PITTSBURGH OFFICE - WPH 4 * '1979 AUGUST 29 RE: HIGH TEMPERATURE CABLE FOR EXPOSED POT SUPERSTRUCTURE WIRING I have attached some sales literature and a sample of a newly developed wire and cable covering which appears to be well suited for the captioned application. Of particular Interest are the qualities of high abrasion resistance, high temperature rating, anA asbestos free construction. There has been a requirement for asbestos free pot wiring on the last two new potllne designs. At the moment, Rockbestos seems to have the only product that meets all requirements. If you happen to be contemplating new construction or rewiring of superstructures, this' information may be useful. This is still a very new product so I cannot offer any experience on delivery or quality control. Should you decide to try the Rockhide we would be very interested in the results. Cable construction is not limited to those listed on the brochure and ran actually be supplied in about any configuration desired. R. L. White RLW:stf cc: L. C. Drapela/J. A. Smith/File - Pgh., WP 4 (Without Sample) , L. F. Snroat - Pgh.. WP 4 .. .. P. R. Atkins - Pgh., AB i J. R. Archlbald/R. R. Corley - Pgh** AB 7 T. I. S. Boak, Jr. - Pgh., AB 14 C. L. Pittman - Pgh., WP 4 B. P. Wilkerson - ATC R. W. Wrenn - Pgh., AB 23 T. J. Sherman - Pgh., AB 20 A. N. McLean - Pt. Henry R. D. Wilkins - Badin Works J. C. Webb - Pocos De Caldas, Brazil J. M. Shaw -- Massena Rene Ortlz/Rafael Arrendondo B. - Veracruz, Mexico J. Lemlzls - Pt. Comfort R. L. Hartley - Palestine W. B. Howell -- Rockdale T. I. Rustwijk -- Suriname W. E. Woodward - Tennessee I. R. Schmidt -- Vancouver._ J. K. "Deshazef*- Warriok" P. H. Gomulklewlcz - Wenatchee r v 22 ALCOA. F49S (REV