North American Insulation

North American Insulation Manulaciurers Associaiion. lmp //www.nainij org/... 

Markowitz SB, Morabia A, Lilis R, et al. 1997. Clinical predictors of mortality from asbestosis in the North American insulator cohort, 1981 to 1991. Am J Respir Crit Care Med 156 101-108. 

North American Insulation Manufacturers Association (NAIMA)... 

FIGURE 6.36 Fiber-blowing process used to make refractory ceramic fibers. [Man-Made Vitreous Fibers Nomenclature, Chemical and Physical Properties, Nomenclature Committee of TIMA Inc., p. 16 (NAIMA—North American Insulation Manufacturers Assoc.).]... 

Economic Aspects and Uses. The principal producers in the United States are U.S. Borax and Chemical Corp., North American Chemicals Co., and American Borate Corp. Their combined aimual capacity in 1989 was reported to be 735,000 metric tons of equivalent boron oxide [1303-86-2], B2O2 (20). Of this toimage, 50% is exported. About 30% of boron compounds are used in glass fiber insulation. Another 30% is used in other type fibers and borosihcate glasses. Boron is also used in soaps and detergents, fire retardants, and agriculture (see Boron compounds). 

In North America, the eductor pipe inside the vessel has an excess-flow valve at the top, immediately below the manhole cover. This valve closes the eductor pipe when the rate of liquid flow exceeds a set rate [2], [24]. North American tank cars have a spring-loaded. safety relief valve, which protects the vessel against overpressure in case of external heat. The tanks have thermal insulation. In Europe thermal insulation and safety relief valves are not used or recommended. 

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