Metals machinists

Metal machinists, printing press operators, and cotton and jute spinning workers are also at higher risk for lung cancer than the general population. 91 These workers use mineral oils that are complex mixtures of aliphatic and aromatic hydrocarbons. The oils are formulated into end products containing a variety of additives and contaminants. These include nitrosamines, chlorinated hydrocarbons, sulfur, amines, and formaldehyde. 

The National Occupational Exposure Survey, conducted by NIOSH between 1980 and 1983, estimated that 96,345 employees (including 590 females) were exposed to fuel oil no. 2, 1,526 employees were exposed to fuel oil no. 4 and 1,076,518 employees were exposed to kerosene in the workplace (NOES 1992). Most exposure to fuel oil no. 2 was in the electric, gas, and sanitary services industries exposure to fuel oil no. 4 was greatest in the primary metal industries, and exposure to kerosene was greatest for machinists. 

Machinists have learned through experience, and are certainly well aware, that machining plastics is profitable. While machining plastics is not particularly burdensome, there are specific considerations that must be followed when machining plastics. Because plastics have a much lower deflection temperature than metals if too great a heat build up is allowed, the plastic may tend to gum tooling. Plastics are more resilient than metals when close tolerance is required. The operator must compensate for the resilience effect of plastic. 

Other areas of concern include increases in the number of aircraft fires and the mrniber of accidents caused by metal fatigue and corrosion, which International Association of Machinists and Aerospace Workers president Winpisinger (1988, pg. 365) attributes to reduced maintenance and inspection efforts however, this observation is not based on a statistical analysis. Finally, an Office of Technology Assessment (OTA, 1988) report raises concerns regarding ... 

An analysis by Morrison and Winston (1988, pg. 11) shows that airframe hours of planes involved in accidents have increased, but hours have increased even more for the industry fleet. Thus, it does not appear that the use of aging aircraft has in general been associated with a substantial increase in overall risk. However, International Association of Machinists and Aerospace Workers president Winpisinger (1988, pp. 365-366) notes that the age of aircraft involved in accidents caused by metal fatigue increased much more rapidly than the age of aircraft involved in other types of accidents. This suggests that increased aircraft age may have contributed to the risk of that specific category of accidents. 

Machinists (metal workers) see metal industry Masseurs 8519... 

Robertson MH, Storrs FJ (1982) Allergic contact dermatitis in two machinists. Arch Dermatol 118 997-1002 Rossmoore HW (1981) Antimicrobial agents for water based metal working fluids. Occup Med 23 247-251 Rycroft RJG (1978) Is Grotan BK a contact sensitiser Br J Dermatol 99 346-348... 

The profession of a machinist includes various work facilities with the major aim of shaping raw metal pieces, such as instruments, tools and machine components, into products with predetermined measurements, mainly by using machine techniques. Although simple tools and manually operated machines have been supplemented or replaced by semi- or fully automatic ones, the metal-work industry is a trade which still produces a lot of work made by hand. Consequently, the parts of the body that are predominantly affected by occupational skin disease are the hands and forearms. 

Aside from MWFs (considered to be the most important irritants and sensitizers), metal workers are also exposed to other chemical irritants, such as cleaning detergents, solvents and degreasers [9]. As the most relevant irritants and allergens do not vary from those in the chapter of this book entitled Machinists we refer the reader to the list of irritants and allergens in that chapter. 

Construction of heat exchangers is executed by companies lai e and small. The work is carried out by skilled craftsmen using precise machine tools and other equipment. Machinists, welders, sheet-metal, and other highly trained workers are involved. Students who pursue such careers may begin with vocational-technical training at the high school level. They... 

Other professions making use of trigonometry include machinists, sheet metal workers, and forensic scientists. Most of these professions are projected to have good to above-average job growth, with the exception of machinists, where the number of jobs is expected to decline slowly. 

For the names of other suppliers and to keep up to date on the metal working craft you might consider subscribing to a trade magazine such as Home Shop Machinist, Village Press Inc., P.O. Box 1810, Traverse City, MI 49685-1810. 

Some occupations (not a complete list) for which eye protection should be routinely considered are carpenters, electricians, machinists, mechanics and repairers, millwrights, plumbers and pipe fitters, sheet metal workers and tinsmiths, assemblers, Sanders, grinding machine operators, lathe and milling machine operators, sawyers, welders, laborers, chemical process operators and handlers, and timber cutting and logging workers.. .. ... 

Diy powders developed for extinguishing combustible metal fines are recommended for the control of titanium fires. For maximum safety, such extinguishers should be readily available to each machinist working with titanium. Dry sand retards but does not extinguish titemimn fires. Carbon dioxide and chlorinated hydrocarbons are not recommended. Water should never be applied directly to a titonium fire. 

The function of a relief valve is to protect a vessel, piping system, or heat exchanger from exceeding its maximum allowable working pressure (MAWP). The MAWP is shown on the code stamp (a metal plate) attached to each process vessel, and by design is determined by the size of the impeller on the pump upstream of the vessel (see Sec. 34.4.1 in Chap. 34). Normally, the relief valve is set to open at this MAWP pressure. The relief valve setting is adjustable and is done by a machinist at a shop pressure-testing facility. 

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