Nonsparking

Pure aluminum, a silvery-white metal, possesses many desirable characteristics. It is light, it is nonmagnetic and nonsparking, stands second among metals in the scale of malleability, and... 

The material should be stored in corrosion-resistant containers, away from alkaline or strong oxidizing materials. In the event of a spill or leak, nonsparking equipment should be used, and dusty conditions should be avoided. Spills should be covered with soda ash, then flushed to drain with large amounts of water (5). 

Although acetylene is considered to be a material having a very low toxicity, a threshold limit value (TLV) of 2500 ppm has been estabUshed by NIOSH. In the presence of a small amount of water carbide may become incandescent and ignition of the evolved air—acetylene mixture may occur. Nonsparking tools should be used when working in the area of acetylene-generating equipment. 

A subsequent study of construction features of motors for Zone 2 locations, resulted in the development of nonsparking, type n motors. The basic design consideration for such motors is similar to that of type e motors but now there is no restriction in the limiting temperature, by 10°C, as in type e motors. Frame sizes for these motors are generally the same as for general-purpose motors. Thus they tend to be smaller and less expensive than type e motors for the same output. 

Wheels are also made of solid sheet bronze or aluminum for nonsparking service. The ventilating and industrial fan identification is given in Table 12-11. 

The turbine has the features of (1) variable speed operation, (2) ease of controls, (3) nonsparking operation for hazardous environment, (4) enclosed operation suitable for corrosive atmospheres, (5) operation without electrical power, (6) small space requirements per horsepower, (7) steam use under almost any condition to suit plant heat bal-... 

Beryllium is obtained by electrolytic reduction of molten beryllium chloride. The element s low density makes it useful for the construction of missiles and satellites. Beryllium is also used as windows for x-ray tubes because Be atoms have so few electrons, thin sheets of the metal are transparent to x-rays and allow the rays to escape. Beryllium is added in small amounts to copper the small Be atoms pin the Cu atoms together in an interstitial alloy that is more rigid than pure copper but still conducts electricity well. These hard, electrically conducting alloys are formed into nonsparking tools for use in oil refineries and grain elevators, where there is a risk of explosion. Beryllium-copper alloys are also used in the electronics industry to form tiny nonmagnetic parts and contacts that resist deformation and corrosion. 

Grind the chlorate separately in a clean, nonsparking (glass or wooden) bowl with a wooden pestle. The resulting granules should approximate those of ordinary table sugar. 

A good source of ready-made thermate is the U.S. military AN M-14 Incendiary Grenade. To remove the thermate, first pry out the fuse assembly with crimpers or other nonsparking implement. See Figure 61. The reddish-brown caked substance on top of the contents of the grenade is a first fire mixture and it is spark sensitive. This should be broken up and the grayish powder beneath, which is the thermate, can be poured out. 

Nonsparking floors are required where exposed explosives are present. 

Figure 2 is a detail of the sloped wood cap used in Figure 1. Note that the joints are taped (at the top of the cant) and caulked (between the lead flooring and wood cant) to keep manufacturing components and product out of joints. The tape material is 3 inch wide, 2 ply, 100 percent cotton, grade B fabric with a warp and fill of approximately 78 x 78 x 72 pounds breaking strength. It should be adhesive-applied using a water insoluble nitrile rubber/ resin solution. These are commonly referred to as "Airplane Fabric" and "Pliobond 20" adhesive. The Fiberfrax Paper is used below lead flooring as an insulation barrier with a low thermal conductivity to resist heat required for installation of lead conductive floor. Note also that nonsparking nails are required. These are usually aluminum or brass.

In buildings containing exposed explosive materials, dusts, or vapors, hardware should be nonsparking material. 

Figures 11 and 12 detail the latch bar. Note that nonsparking metal is used for all fasteners and that the hardwood wedge in Section C-C is set in a full bed of caulking so as not to permit an open joint.

This can be done in the old way with a stirring propeller entering through one of the necks of the flask, attached to a nonsparking motor. It is easier to sit the flask on a magnetic stirrer, and drop a magnetic stirring bar (preferably Teflon coated and egg shaped for round-bottom flask) in the solution. 

Fire. Avoid open flames by use of electric heaters. Limit the quantity of flammable liquids stored in the laboratory. Motors should be of the nonsparking induction type. 

A 2% beryhium mixture with copper produces a unique ahoy of bron2B that is six times stronger than copper metal. This ahoy does not give off sparks when struck with a hammer—a valuable characteristic when metals must be used in explosive gaseous envitonments. This ahoy sometimes contains smah amounts of other metals such as nickel or cobalt, which makes for excellent electrical conductivity for switching equipment, given the ahoy s simultaneous hardness and nonsparking qualities. Beryhium is also transparent to X-rays, which makes it ideal for windows for X-ray tubes. 

To protect against the explosion and fire hazard, a plant manager should (a) have qualified plant personnel field monitor for explosive atmospheres and flammable vapors, (b) keep all potential ignition sources away from an explosive or flammable environment, (c) use nonsparking, explosion-proof equipment, and (d) follow safe practices when performing any task that might result in the agitation or release of chemicals. 

Black Powder possibly some dynamites can be initiated by sparks of a non-electrical nature such as those caused by metal-on-stone friction etc. Manufacturers of dynamite use nonsparking tools in their plants. This is probably... 

One attractive property of beryllium is its nonsparking quality, which makes it useful in such diverse applications as the manufacture of dental appliances and of nuclear weapons. Beryllium-copper alloys find use as components of computers, in the encasement of the first stage of nuclear weapons, in devices that require hardening such as missile ceramic nose cones, and in the space shuttle heat shield tiles. Because of the use of beryllium in dental appliances, dentists and dental appliance makers are often exposed to beryllium dust in toxic concentrations. 

Doors in drying houses should be shut with clamps made of wood or of nonsparking metal. 

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