Document bOOm4naNp7671JJXZrQrz8Ogg

AlfA W* dC: DOW CHEMICAL U.S.A. c^w# B. tilled < MICHIGAN DIVISION September 14, 1976 MKXANO. MICHIGAN 4M40 Milt Strom General Services 49 Building l cc: T. J. Paquet, Division Engineering, 821 Building HANDLING OF WEATHER-PROOF PAPER Both the Johns-Manville and Phillip Carey weatherproofing paper used around insulation contain asbestos which can become air-borne. This type of paper should no longer be applied to insulation in the Michigan Division. It is no longer avail able from DVS. There are however many miles of pipe in the plant that are covered with this product. Since it does contain asbestos it should be treated essentially the same as asbestos insulation. These handling procedures can be found in Michigan Divison Safety Standard SS-140. These pro cedures include wetting the material before removal, bagging in plastic bags, labeling with proper labels and sending it to land fill. It has been brought to my attention that some of these proced ures are not being followed when the paper is removed from the insulation. I would appreciate it if you would pass this reminder on to your maintenance network so they can get it back to their supervisors. Thank you for helping in this communication. ST0000327 Industrial Hygiene Services 433 Building jal AN OMRATUta UNIT OP TMS OOW CHSMlCAL COMPANY DOW 00123 I ****<f< t 1AAUC 'UQ composition Aircell Kayla Piberglas Armaflex Styrofoam Corrugated Asbestos Sheet Calcium Silicate Bonded Glass Fibers Molded Foam Rubber Expanded Polystyrene Range Ambient to 200 F. 300 to 1200 F. -1200 to 450 F. 32" to 200 F. -2000 to Ambient Available Far Cost*** Comments Cur ./ Available on DVS Preformed Pipe Molded Pipe A Block Molded Pipe A Blankets Molded Pipe Covering Preformed Pipe A Boards . Va .40 .29 .2ft .24 3/4"xl2" $. 22 A very poor ineulntinf maUrUL. Very little used outside of Midland Division. Should only be used as protective pipe covr iwxia" $.3T A good insulating material. Quite friable. Contains about 35% asbestoa. 3/4'xia" 9.34 A strong, semi-rigid A resilient insulating material..Avails! with a variety of vapor barrier A weatherproof jackets. l/2r'xl2tl $. 30 An excellent covering for copper tubing having many bends. Recommended for use on dual temperature lines. Flu? #. 46 Excellent for low temperature insulation. Unlbestos Careytemp 1500 Tliurane Sprayed Polyurethane Foamglas Molded Asbestoa 300 to Fibers 1200 F. Expanded "300 to Perlite 1500 F. Polyurethane -200 to Foam +200 F. Foamed in Place '-200** to Insulation 200 F. Expanded Cellular -450u to Glass 800 F. Other Available Recommended Materials Molded Pipe .30 A Block' Molded Pipe .42 A Block Preformed Pipe .15 A Boards Sprayed or Form . 15 Poured Preformed Pips .40 A Blocks l"al2*' lYTxl2n l"xl2" l"xl2" f. 40 A more durable fora than Calcium Silicate. Generally used o high pressure etesa transmission linos. A brand new material from Phillip-Carey. Priced similar to Cal-Stl. Has a very low asbestos content--less than 5%. 9.80 An excellent material for low temperatures. Must be protecte from sunlight. More Are retardant than styrofoam. 9.30 Wo have had but little experience with this product. Vapor barrier protection will be very important. $. 35 A high density, excellent dual temperature material. Quite time consuming to apply. Dow is sntoring this market with a new material called Ceramic Foam. (1) The trade names are typical of several similar materials on the market. (2) Costs are baaed on covering for 1-inch pipe size in the thickness listed and 12 inches long. A great number of Jackets are available, both attached and separate. The cost of these would be in addition to the prices listed above. Roy Anderson 5-20-69 --I CD CD CD CD CO '* DOW 00124 DISCUSS10W Men were found to toe working almost exclusively with asbestos-containing mater. Their time-weighted exposures to dusts from the asbestos-conu. Lng materials were in excess of the proposed TLV of 2.0 mppcf and barely under the present TLV of 5 mppcf. Steps should toe taken to lower the time-weighted exposures to within proposed acceptable limits. Several means of reducing the time-weighted tposures are apparent! ST0000329 1. Cease using asbestos-containing materials. If use of asbestoscontaining materials was stopped, exposures would toe reduced to acceptable levels, even though some low-level exposure would toe experienced until presently Installed coverings have been replaced due to natural attrition. 2. Effective use of approved respiratory devices. Respiratory protection Is practical for Jobs which are of short duration and Infrequent occurrence. It can toe seen from Table 1 that Jobs requiring respiratory protection are neither infrequent nor of short duration. Men encounter greatest exposures during the cutting and applying of Air cell and Kaylo. These two operations are done for 50# of the day -- sometimes lOOjt of the day. Many other operations listed in Table 1 could require DOW 00*25 12 use of respiratory devices. Attempts to lower exposures to 2 mppcf by using respirators seen futile. 3* Use local ventilation. This method would be effective If the ventilation could be kept close to the dust source. Pipe coverers' work routines make this difficult; e.g., working aloft, or In cramped areas. In the event new types of covering materials are used, men should be Instructed regarding the toxic properties of the materials and the hazards associated with using the material. Protective measures to prevent or lower undesirable but unavoidable exposures to the material should be well understood. Any education effort must precede or be concurrent with first usage of new materials. Turing this survey, most men voiced strong objection to flberglas, asserting that flberglas Insulation materials were far more hazardous than asbestos insulation materials. This contention is not supported by 25 years available field experience and Independent laboratory testing on flberglas. The Environmental Research Laboratory will survey and evaluate upon request any proposed types of insulating materials and relate their usage to the health hazards associated with these materials. DOW 00126 ST0000330 ST000033I 13 UNIT INDEX Pipe covering operations were surveyed and evaluated. Men received tine-weighted exposures to asbestos near the present Threshold Limit Value of 5 nppof and in excess of the tentatively proposed Threshold Limit Value of 2 mppof. Steps should be taken to reduce exposures to the proposed new standard. DISTRIBUTION L. Warren, Field Service Unit #6, 189 Building R. Wood, Field Service Unit #11, 49 Building H. Ahlich, Field Service Unit #2, 759 Building B- VanderKllpp, Distribution, 572 Building T. J. Madden, Field Service Unit #10, 222 Building J. Bradley, Plastic Prod. Maintenance, 433A Building B- B- Holder, M.D., Medical Department, 607 Building H. L. Gordon, M.D., Corporate Medical Department, 2030 ARC I). B. Morse, Safety Department, 401 Building S. M. MacCutcheon, Safety and Loss Prevention, 2030 ARC R. J. House, Division Accounting Staff, 256 Building RAD:Sjl 00127 dou