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illustrates the useful fluid temperature and fluid ranges for compressed asbestos gasketing (Union Carbide 1987). Asbestos sheet gaskets are used in exhaust systems and turbo chargers, cylinder head and intake manifolds, and high load/high extrusion applications. The most common sheet gaskets are used in engines, gear cases, and pipe flanges 1 Asbestos is the primary constituent for making compressed sheet gaskets (varying upwards from 75 percent by weight, depending on the application). Elastomeric binders such as neoprene, silicone based rubber, natural rubber, nitrile rubber, Teflon, or styrene-butadiene are used to ensure that gasketing material remains intact. B. Producers of Sheet Gasketing In 1985, five companies produced 2,848,308 square yards of compressed sheet gasketing. These companies consumed 4,041 tons of asbestos fiber (ICF 1986a). In addition, a sixth company produced an estimated 759,000 square yards of compressed asbestos sheet gasketing from 1400 tons of asbestos fiber. 2 The total estimated consumption for this category is, therefore, estimated to be 3,607,408 square yards of sheet gasketing from 5,441.1 tons of fiber. Table 2 presents the production volume and fiber consumption for gaskets in 1985. Known imports make up a small percentage of the total gaskets consumed in the U.S. There were 506.35 tons of sheet gasketing imported in 1985 (ICF l986a). The asbestos compressed sheet gasketing market was estimated to be worth 1 Due to the wide variety of gasketing shapes, sizes, compositions, and sheathing materials available, an all-inclusive list of fabricated products is not available. 2 Based on the methodology for allocating consumption to survey non-respondents in Appendix A. - -2-
Table 1. Fluid and Pressure Ranges for Compressed Asbestos Sheet Gasketing Material Temperature and Pressure Producta 750-1000°F, Vacuum - - 1500 psi Premium Compressed Asbestos Sheet 250-750°F, Atmos - - 1500 psi Service Compressed Asbestos Sheet -70-250°F,Atmos - - 1500 psi Economy Compressed Asbestos Sheet apremium indicates the highest grade of compressed asbestos sheet, usually wire inserted. Service indicates general use compressed asbestos sheet and economy is the lowest grade of asbestos sheet available. Source: Union Carbide 1987. -3-
Page 1: XXVII. SHEET GASKETS A. Product Des
Page 5 and 6: $20.5 million in 1985, based on an
Page 7 and 8: Table 3. Substitutes for Asbestos S
Page 9 and 10: Aramid gaskets are usually composed
Page 11 and 12: esistance. A wire insert is often a
Page 13 and 14: 6. Ceramic Fiber Mixtures Ceramic f
Page 15 and 16: REFERENCES Carborundum. 1986. Produ
Page 17 and 18: Bulk Square braád Rolled (over cor
Page 19 and 20: Table 1. Standards of Asbestos Yarn
Page 21 and 22: A. ‘I’ A. ‘-I PRESSURE ~ Movi
Page 23 and 24: Table 2. Operating Conditions and U
Page 25 and 26: Table 3. Production of Asbestos Pac
Page 27 and 28: een forced to replace the asbestos
Page 29 and 30: Table 4. Estimated Market Share for
Page 31 and 32: useful temperature limit of approxi
Page 33 and 34: 6. Other Substitute Fibers Other fi
Page 35 and 36: Table 6. Data Inputs for Asbestos R
Page 37 and 38: TSCA Section 8(a) submission. 1982.
Page 39 and 40: a viscosity control for waterproofi
Page 41 and 42: Table 1. Production of Asbestos Roo
Page 43 and 44: or talc. The additives ease grindin
Page 45 and 46: Table 2. Manufacturers of Cellulose
Page 47 and 48: Cellulose bodied roof coatings and
Page 49 and 50: equivalent basis, they are favored
Page 51 and 52: compounds. These formulations have,
Page 53 and 54:
. Other Roof Coatings and Cements O
Page 55 and 56:
Table 4. Data Inputs for Asbestos R
Page 57 and 58:
ATTACHMENT B PROJECTED PRICES ANALY
Page 59:
ICF Incorporated. 1986 (July-Decemb
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