Document 5D83ER1n69DEKRdqoaeeDQw7e

FILE NAME Manville JMA DATE 1966-1967 DOC JMA391 DOCUMENT DESCRIPTION Brake Wear Tests & Issues Brake lining lining + A. C. Smith Research and Engineering Center December 13 1966 environmental Problems Status Report November 1966 1. Packings and Friction Materials Division Study of wear products from friction materials J. Dec During the period October | through November 30 1966 the wear dust collected from the special dynamometer enclosure was analyzed in detail The results were unexpected in that asbestos fiber could be detected only by the electron microscope which indicated a maximum of 1.4 per cent by weight fibrous debris This is in contrast to about 70 per cent by weight chrysotile fiber in the original friction material David Sinclair has accounted for the difference in fiber content that high surface temperatures and severe abrasion by suggest- ing fiber into an convert the asbestos amorphous mineral He further demonstrates mathematically that the very high temperatures 2000F required to break down fiber to this extent could be generated at the contact surface of a friction material even during mild braking in which the apparent temperature does not exceed 200F This derives from the fact that the true area of contact in the friction couple is about one per cent of the apparent area From this work it would appear that the fear of large quantities of asbestos fiber being introduced into the atmosphere as part of the wear dust of friction materials is unfounded However the tests to determine the bio- logical effects of such dust regardless of its fiber and we are therefore not in position to draw final content are not complete , conclusions 2. Pipe Division A. An inexpensive inner coating for TRANSITE pipe J. H. Swensen A development program Project 22 is under way to develop an Improved Soft Water Coating for Potable Water Pipe The present coating based on asphalt has become more and more due to taste and odor problems unacceptable Efforts are being directed toward a clear coating which will not affect water quality Polyterpene- type coatings have looked promising although their UV resistance now appears to be this program will less have than satisfactory A coating developed within to be inexpensive and may fill the needs for a general TRANSITE pipe coating It is hoped that the improved sofr water coating can be commercialized in the first quarter of 1967 B. Effect of water flow through TRANSITE pipe A layout of a system for studying the effects of flow and water composition on TRANSITE pipe has been prepared and an assignment has been placed on the Engineering Department Probably this system will not be operational until the second quarter of 1967 PRODUCED JM - 83 A. C. Smith -2- December 13 1966 Fiber Glass Insulations Residue from flow of air through fiber glass ducts etc. J. Hannes Initial tests run by the Kettering Institute with Corning Fiberglas duct indicated no measurable release of fiber into the air stream Much more extensive tests are under way now in the C laboratories under the supervision of the Kettering Institute Manville duct liners and duct board are part of these tests which will include a variety of air flow conditions Complete data will not be available until about March 1 1967 4. Building Products Division A. Degradation products of asbestos felt built roofs J. Q. Trice The Instrument Development Company of Reston Virginia a division of Resources Research Inc. is preparing a preliminary engineering drawing and specifications for equipment which they propose for the actual weathering and collection of materials Briefly the environmental chamber will consist of four components a the mechanical chamber b the radiation system c the air handling system and d the liquid handling system Detailed information will be available from the Instrument Development Company by December 15 We now believe that the actual samples for weathering will have to be prepared outside the environmental chamber because of the high concentration of material thrown from the hot asphalt and from working with the roofing felts After the samples have been prepared one will be exposed in the environmental chamber and a second exposed on the roof of the Research laboratory so that at least visual observations can be made comparing the performance of the two samples Materials produced or released during the weathering process will into three categories fall a b c particulate - soluble which will be collected on membrane filters - which will be picked up by the wash water which must also be put through a membrane filter in order to collect solids which are removed by washing vaporized materials - which will be collected at the low temperature traps in the air circulating system 8. Degradation products of asbestos materials A program for sampling and testing materials has been drawn up The test program will include an examination of exposed material which has been in service for many years as well as laboratory exposure of products In the case of exposed products since shingles are partially exposed and partially covered in use it is possible for us to obtain good reference samples and analyze the changes that have occurred to the exposed surface A preliminary examination after long exposure shows of some vertically the following exposed normal PRODUCED JM - 83 products A. C. Smith -3- 6 December 13 1966 Source of Samples JM office building Manville New Jersey JM plant Nashua New Hampshire JM plant Nashua New Hampshire JM plant Nashua New Hampshire Products Dry process shingles Dry process shingles Flat TRANSITE Corrugated TRANSITE Exposure Period 1918-1964 1926-1966 1921-1966 1924-1966 Thickness decrease during exposure inches 0.003 to 0.020 0.001 0.006 0.012 The small amount of weathering exhibited by these up the need for very precise measurements in this products points test program 5. Flooring Division Wear products from flooring materials J. Q. Trice Experimental work has not yet been started in this program General Company Research Organic material in asbestos fibers F. L. Pundsack Cape $ Blue packed in paper bags and in jute bags was obtained from the Manville Pipe Plant and the organic content extracted The blue fiber will packed in jute bags contained up to sixty 60 times as much organic mate- rial as did the fiber packed in paper bags Jeffrey chrysotile packed in paper bags and in jute bags is being analyzed in the same way and data will be available soon We are working with a company named Analtech to develop methods of ing all the trace organic substances present in asbestos identify- identify- It may be of interest to note that in 1965 ately five 5 times as much pyrene in the United States approxim- was released in the form of cigarette smoke as was contained in for all purposes in the same year all the asbestos used in this country Incidentally more than half the pyrene associated with asbestos was contained in the approximately 40,000 tons of imported blue fiber F. L. Pundsack ae CC Le F. J. Solon - GHQ K. W. Smith -GHQ PRODUCED JM - 83 COPY FORK 4-162 4-162 4-162 SEGMENT NO NOTES brable tests 1966-67 1966-67 INITIALS < PARTY Beastly 12 1550 A. C. Smith Research and Engineering Center December 13 1966 environmental Problems Status Report November 1966 Packings and Friction Materials Division Study of wear products from friction materials J. Dec During the period October 1 through November 30 1966 the wear dust collected ' from the special dynamometer enclosure was analyzed in detail The results were unexpected in that asbestos fiber could be detected only by the electron microscope which indicated a maximum of 1.4 per cent by weight fibrous debris This is in contrast to about 70 per cent by weight chrysotile fiber in the original friction material David Sinclair has accounted for the difference in fiber content by suggest- ing that high surface temperatures and severe abrasion convert the asbestos fiber into an amorphous mineral He further demonstrates mathematically : that the very high temperatures 2000F required to break down fiber to this extent could be generated at the contact surface of a friction material even : during mild braking in which the apparent temperature does not exceed 200F ' This derives from the fact that the true area of contact in the friction couplies about one per cent of the apparent area From this work it would appear that the fear of large quantities of asbestos fiber being Introduced into the atmosphere as part of the wear dust of friction materials is unfounded However the tests to determine the bio- dust logical effects of such and we are therefore not in a regardless of its fiber content are position to draw final conclusions not complete complete Pipe Division A. An Inexpensive inner coating for TRANSITE pipe J. H. Swensen A development program Project 22 is under way to develop an Improved Soft Water Coating for Potable Water Pipe The present coating based on asphalt has become more and more unacceptable due to taste and odor problems Efforts are being directed toward a clear coating which will not affect water quality Polyterpenetype coatings have looked promising although their UV resistance now appears to be less than satisfactory A coating developed within this program will have to be inexpensive and may fill the needs for a general TRANSITE pipe coating It is hoped that the improved soft water coating can be commercialized in the first quarter of 1967 B. Effect of water flow through TRANSITE pipe A layout of a system for studying the effects of flow and water composition on TRANSITE pipe has been prepared and an assignment has been placed on the Engineering Department Probably this system will not be operational until the second quarter of 1967 PRODUCED 7-63  * A. C. Smith -2- December 13 1966 3. Fiber Glass Insulations Residue from flow of air through fiber glass ducts etc. J. Hannes Initial tests run by the Kettering Institute with Corning Fiberglas duct indicated no measurable release of fiber into the air stream Much more extensive tests are under way now in the C laboratories under the supervision of the Kettering Institute Manville duct liners and duct board are part of these tests which will include a variety of air flow conditions Complete data will not be available until about March , 1967 4 Building Products Division A. Degradation products of asbestos felt built roofs J. Q. Trice The Instrument Development Company of Reston Virginia a division of Resources Research Inc. is preparing a preliminary engineering drawing and specifications for equipment which they propose for the actual weathering and collection of materials Briefly the environmental chamber will consist of four components a the mechanical chamber b the radiation system c the air handling system and d the liquid handling system Detailed information will be available from the Instrument Development Company by December 15 We now believe that the actual samples weathering will have to be prepared outside the environmental chamber because of the high concentration of material thrown from the hot asphalt and from working with the roofing felts After the samples have been prepared one will be exposed in the environmental chamber and a second exposed on the roof of the Research laboratory so that at least visual observations can be made comparing the performance of the two samples Materials produced or released during the weathering process will Into three categories fall a b c particulate - which will be collected on membrane filters soluble - which will be picked up by the wash water which must also be put through a membrane filter in . vaporized order materials - to collect solids which are removed by washing which will be collected at the low temperature traps in the air circulating system B. Degradation products of asbestos materials A program for sampling and testing materials has been drawn up The test program will include an examination of exposed material which has been in service for many years as well as laboratory exposure of products In the case of exposed products since shingles are partially exposed and partially us to obtain good reference samples occurred to the exposed surface surface covered in use and analyze the it is possible for changes that have A preliminary examination after long exposure shows of some vertically the following following exposed normal products bg rg JMJM - 3 A. C. Smith Research & Engineering Center January 25 1967 , ASBESTOS - ENVIRONMENTAL PROBLEMS STATUS REPORT - JANUARY 24 1967 1 PACKINGS AND FRICTION MATERIALS DIVISION A. Study of Wear Products from Friction Materials Dec As indicated in the report dated 12/13 only 1.4 of the wear dust collected was asbestos fiber No information has yet been received regarding the dust samples submitted by Dr. K. W. Smith for biological testing No additional sampling of wear dust is planned until information on biological effects is obtained PIPE DIVISION A. An Inexpensive Inner Coating for TRANSITE Pipe Swensen A polystyrene coating has been formulated which has shown more than the required resistance to violet and which meets the AWWA requirements for water coating Long- term adhesion has been satisfactory to date two months will exposure A Commercial Recommendation about February 15 be issued on B. Effect of Water Flow through TRANSITE Pipe Swensen Plant Engineering has estimated the costs of constructing a system to study the effects of flow and water composition on TRANSITE pipe to be approximately 280,000 In view of the high estimated cost the proposed program and system are being revised " FIBER GLASS INSULATIONS A. Residue from Flow of Air through Fiber Glass Ducts etc. Hannes As mentioned in the December 13 report the extensive test program is continuing Data will be available about March 1 BUILDING PRODUCTS DIVISION A. Degradation Products of Asbestos Felt Built Roofs Trice Based on specifications and quotation from Instrument Development Co. Reston Virginia an appropriation request . in the amount of 25,000 will be submitted by January 27 for an environmental chamber This appropriation will be accompanied by a detailed program and an estimated total . PRODUCED PRODUCEDPROPRDODUUCECD ED' JM - 23 C. Smith . -2- January 25 1967 cost Delivery of the chamber is promised for 16 weeks after receipt of order Degradation Products of Asbestos Materials Trice Samples of Steam Cured TRANSITE COLORLITH showed a decrease in thickness of less than 0.003 after at least 12 years vertical exposure on the REC test decks Normal Cured products showed a decrease in thickness of 0.001 0.020 The program of finding and examining been expanded to include wet and dry normal and steam cured samples exposed process samples as well has as FLOORING DIVISION A. Wear Products from Flooring Materials Trice A program is being prepared to utilize a modification of the type of environmental chamber being recommended for the asbestos CORPORATE RESEARCH program Item 4A above . A. Organic Material in Asbestos Fibers Speil Research Memorandum M411-489 12/29/66 presented a review of the literature concerning the occurrence and properties of benzopyrene in the atmosphere from smoking exhaust fumes overheated tar and asphalt the general burning of rubbish coffee roasting etc. The outer layer of a well done charcoal steak was found to contain a substantial quantity of benzopyrene Samples of asbestos have been sent to Case Institute Technology and Mount Sinai Hospital for experimental they are conducting on their own of work Work has continued with Analteck Inc. on improving methods of identifying trace organic substances present in asbestos Most recent information shows Jeffrey fiber from a paper bag to contain 19-31 mg organic material gm of fiber whereas samples from a jute bag showed 4 mg at the center and 16 mg adjacent to the surface of the bag -- the reverse of information obtained with Blue fiber Additional tests are in progress We cooperated with the Veterans Administration Hospital Hines Illinois who are studying the relationship between asbestosis and mesothelioma where their work with mice showed treated asbestos gave a more toxic reaction than unheated asbestos PRODUCED PRODUCED PRODUCED PRODUCED o C + . Smith | -3- January 25 1967 Hamster lung tissue samples submitted by the Health Service Institute Fairleigh Dickinson University examined by electron microscopy showed the presence of . both amosite and chrysotile asbestos etr cc B. Burnett GHQ F. J. Solon GHQ - K. W. Smith GHQ F. L. Pundsack wmm W. M. MacAlpine . : PRODUCED PRODUCED PRODUCED | JM - 83