Explosions mechanical

Mechanical explosion An explosion resulting from the sudden failure of a vessel containing high-pressure nonreactive gas. 

For mechanical explosions a reaction does not occur and the energy is obtained from the energy content of the contained substance. If this energy is released rapidly, an explosion may result. Examples of this type of explosion are the sudden failure of a tire full of compressed air and the sudden catastrophic rupture of a compressed gas tank. 

An explosion rips through a chemical plant. A 1000-ft3 tank containing compressed air at 100 atm is suspected. Site damage indicates that the windows in a structure 100 yards away are shattered. Is the mechanical explosion of this compressed air tank consistent with the damage reported, or is the explosion the result of some other process ... 

When classified on the basis of the nature of explosion, there are three types of explosions (a) Mechanical (b) Nudear and (c) Chemical. The mechanical explosion... 

The mechanical explosion damage is caused by the blast or shock wave. The explosion starts acoustic waves in the air which travel with the acoustic velocity, c, superposed on the velocity u of the mass motion with which material is convected out from the centre. Since c ylr where Tis the absolute temperature and since both u and c are greater farther back in the wave disturbance it follows that the back of the wave overtakes the front and thus builds up a sharp front. This is essentially discontinuous in both pressure and density. It has been shown that in such a wave front the density just behind the front rises abruptly to six times its value just ahead of the front. In back of the front the density falls down essentially to zero. 

Part of an explosive train which initiates the - detonation of high explosives, especially of insensitive ones. It may itself be triggert by a seperate -> primer of primary explosives or an integrated primer. Detonators are classified by the method of initiation percussion, stab, electrical impulse, or flash. Laser initiation is also used. Depending on the application detornators can include a delay mechanism. Explosive charge placed in certain equipment and set to destroy the equipment under certain conditions (- Initiator). 

In Sec. 5.3 we considered the thermodynamics of explosions that did not involve chemical reaction. Here, we extend this discussion to explosions with chemical reaction. Since the energy released on an exothermic reaction may be very large, chemical explosions are generally more devastating than purely mechanical explosions. In a... 

The equations describing a chemical explosion are the same as those for a mechanical explosion (see Sec. 5.3) that is, to compute the maximum energy released in an explosion, we assume the process within the region bounded by the shock wave is reversible and adiabatic so that... 

Reciprocating plate column 316 s/s tower and plates including redprocating mechanism, explosion-proof motor and drive excluding pump, piping, foundations. FOB cost = 425 000 at the product of (height, m) (diameter, m) = 10 with n = 0.75 for the range 0.5-100. L-rM = 2.0. L/M = 0.48. 

J. D. Buckley and B. A. Stein Eds., Joining Technologies for the 1990s Welding, Brazing, Soldering, Mechanical, Explosive, Solid-state, Adhesive, Noyes Data Corporation, Park Ridge, NJ, 1986. 

Mechanical explosives (water is instantaneously converted to gas, or gas is suddenly heated in a limited closed area)... 

The Blast Effects Group at BakerRisk has a broad knowledge in the field of explosion impacts and effects in a variety of explosion phenomena ranging from fuel air, dust, chemical, and mechanical explosions. They are eqnipped with a large-scale outdoor test facility. 

A fire-induced BLEVE is a physical explosion that can occur when flame impingement locally overheats the vapor space of a storage vessel containing a liquefied material under pressure. As a result of the increased temperature, the vessel pressure will increase due to the higher vapor pressure. For vessels that lack adequate pressure relief, rupture can occur due to local overheating because the metal may be sufficiently weakened that it is unable to withstand even the normal vessel design pressures. When contents are noncombustible (e.g., water), a mechanical explosion (liquid expanding rapidly into vapor) will occur. When flammable, as with hydrocarbons, a fireball will also follow. 

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