Detonating fuse properties

Further properties which a detonating fuse should have are the ability to initiate blasting explosives (tested with suitable relatively insensitive mixtures usually of TNT and ammonium nitrate) resistance to low temperatures without cracking on flexing and to hot storage without desensitisation and toughness to prevent damage from stones, etc. The fuse must always be waterproof and must often withstand diesel oil, which can separate from ANFO. 

Fuses Described in the Book of Fordham include Detonating Fuse Introduction (p 131) manuf by the dry process (pp 132—33 with Fig 12.1) manuf by the wet process (p 133) properties (p 134) LEDC (Low Energy Detonating Cord)... 

Hopkinson s Pressure Bar Test. The quantitative measurement of the press developed by expls over small intervals of time, which is a measure of expl violence, was made possible by application of the method conceived by Prof B. Hopkinson. The application of Hopkinson s principle to a wide field of research such as iaitiation of deton, properties of the deton wave, and the design of detonators fuses and the design of a variety of instruments were carried out by physicists of the Res Dept, Woolwich, England... 

HNS is soluble in dimethyl formamide and slightly soluble in hot acetone, methylethyl ketone, and glacial acetic acid. HNS is used as a heat resistant booster explosive and has excellent properties for use in PBXs and mild detonating fuse end couplers and end boosters. 

Its expl properties were strength by Trauzl Test, 330 to 350cc, and detonation velocity 3000 to 500Qm/sec. The mining authorities prescribed the use of the strongest blasting cap to ensure detonation, but when well confined, a fuse alone caused expin (See also Ref 3, El Ref 4, Ger 42-L Ger 121-L)... 

Y. Du, M. Jiang, Q. Sun and X. Fu, Detonation Properties and Thermal Stabilities of Furazano-Fused Cyclic Nitramines , in Proc. International Symposium on Pyrotechnics and Explosives, China Academic Publishers, Beijing, China, 412 (1987). 

Apart from its unique property of burning quickly at relatively low confinement it is not prone to detonation. Under normal conditions the maximum rate of explosion is about 500 ms In the absence of moisture, gunpowder in also extremely stable. It has been documented that until World War I it was the practice of the French Army to preserve any batches of gunpowder that had proved especially good. These were used in time train fuses and it was claimed that some batches so preserved dated from Napoleonic times. 

Properties They are high explosives and are characterized by relatively great sensitivity to beat or shock. They detonate when subjected to heat or shock and are set off by the spit of a black-powder fuse, by the heat of an electrically heated wire, by percussion (firing pin), or by friction. Their detonation produces flame and shock, which are used to initiate the deflagration of powder or the detonation of high explosives. ... 

Explosives derived from Benzene—Toluene and Nitro-Benzene-Di- and Tri-nitro-Benzene-Roburite Properties and Manufacture-Bellite Properties, c.-Securite—Tonite No. 3.-Nitro-Toluene-Nitro-Naphthalene—Ammonite-Sprengel s Explosives-Picric Acid- Picrates-Picric Powders—Melinite-Abel s Mixture—Bmgere s Powders- The Fulminates-Composition, Formula, Preparation, Danger of, c.- Detonators Sizes, Composition, Manufacture—Fuses, c. 

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