Flame shield

Flame shield below tray plus water spray above 0.1 5 gpm/ft (6.1 (Ipm/mh Top only... 

Flame shields on the underside of cable trays have been used effectively to deflect flames or heat emanating from fires below. Flame shields should be fabricated of Xein (1.6-mm) thick steel plate or equivalent mounted below the cable tray and extending a minimum of 6 in (152 cm) beyond the tray side rails. These shields can improve tray survivability usually in concert with water spray systems. Flame shields alone (with no water spray) can provide only brief fire protection and are not normally used in this manner. Flame shields coated with... 

Fivonite = tetramethylolpentanone tetranitrate 309 flamebeau = flare 142 flame shield 142 flare 142... 

When using an ICP for excitation and an air-acetylene flame shielded with nitrogen for atomization, the detection limits obtained for Ca, Cd, Co, Fe, Mg, Mn, and Zn were about the same or better than those obtained for the corresponding elements by flame AAS. 

The mixing zone is protected from the radiant heat and the burner flames by a special flame shield or another appropriate device. The hot bitumen is usually added under pressure from the discharge end. The filler and the reclaimed asphalt, if used, are also added in the mixing zone. 

FIG. 26-32 Methods of diking for flammable hqiiids (a) traditional diking method allows leaks to accumulate around the tank. In case of fire, the tank will he exposed to flames that can he supplied hy fuel from the tank and will he hard to control, (h) In the more desirable method, leaks are directed away from the tank. In case of fire, the tank wiU he shielded from most flames and fire wiU he easier to fight. (From Englund, in Advances in Chemical Engineering, vol. 15, Academic Press, San Diego, 1.9.90, pp. 73—135, hy permission. )... 

Pilots and Igniters - Two gas-fired pilots with igniters are installed adjacent to the inlet distributor. The igniter assembly and pilot gas valves must be located remote from the flare for protection of personnel and equipment. This restricts igniter selection to the forced air supply type. Location of these components should be such that the calculated radiant heat density at maximum load does not exceed permissible levels for personnel exposure. Because of the potential hazard of release of unignited hydrocarbons at ground level, a flame scanner (suitably shielded and aircooled and cotmected to an alarm in the control house), is provided for each pilot. 

The transfer of heat from a source to a receiver by radiant energy is radiation. The sun transfers its energy to the earth by radiation. A fire in a fireplace is another example of radiation. The fire in the fireplace heats the air in the room and by convection heats up the room. At the same time, when you stand within line of sight of the fireplace, the radiant energy coming from the flame of the fire itself makes you feel warmer than when you are shielded from the line of sight of the flame. Heat is being transferred both by convection and by radiation from the fireplace... 

One crimped metal ribbon flame arrester mannfactnrer has a composite element design consisting of mnltiple crimped metal ribbon elements with diverter shields (tnrbnlence-indncing devices) between the elements (Enardo n.d.). This design is based on the patent issned to Ronssakis and Brooker (1995). 

Caution Addition of 0 5 cm pieces of sodium metal to methanol or ethanol must be done in a chemical hood and behind a safety shield. Addition should be slow to minimize evaporation loss of methanol or ethanol. No flames or burner should be permitted in the area. Disposal of sodium metal must be earned out in someone s presence. 

Miscellaneous (nuclear shielding, metallurgy, corrosion control, leather tanning, flame-proofing, catalysts) 19% (26%)... 

Several coating techniques are now available to overcome the oxidation problems with molybdenum above 300°C. One of these, based on molybdenum disilicide, is finding increased usage in flame breakout shields for aero-engines where tests have shown (unpublished work) that the coated material can withstand a high pressure torching type flame attack at temperatures in excess of 2(X)0°C. 

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