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Primer - definition of primer by The Free Dictionary
Of course, people have been misusing tannerite for years, compiling large quantities to create an ad-hoc explosive. This video claims to use 30 pounds of tannerite to destroy a 1971 ford bronco.
For official use only all dynamite is considered a secondary high explosive and can be initiated with a blasting cap – all are suitable as main charges in an ied terrorists operating domestically will likely try to steal dynamite or improvise its manufacture – mining sites and quarries may be targeted for theft.
14 may 2013 primer is a unit of cap-sensitive explosive used to initiate other explosives or blasting agents.
Low explosives, which deflagrate (burn) rather than detonate and propagate at velocities 1,000 meters per second (m/s) and less, include the propellants, pyrotechnics and initiating or primer explosives. Examples are nitrocellulose, double base powder, smokeless powder, black powder, cordite and the metal oxidizer mixtures.
Primer synonyms, primer pronunciation, primer translation, english dictionary definition of primer.
Use flame or flash for their initiation and not a shock as produced by primers or detonators. Explosives of this kind are known as deflagtating or iow explosives. The simplest device for ignition is b ickford or miner’s safety fuse, described in ref 44, p b1 12-l.
The objective of the primer is to achieve a stable detonation. Neither over-priming or under-priming the agent is desirable. The diameter of the primer must be larger than the critical diameter of the explosive. Every explosive has a certain critical diameter below which detonation will not propagate beyond the primer point.
A priming compoundis a highly sensitive explosive chemical which, when struck by the firing pin or hammer of a weapon, will explode with great violence, causing a flame to ignite the propellant. This explosive chemical is often mixed with other chemicals which provide oxygen to assist in the production of the flame, a fuel to increase the length and temperature of the flame and ground glass as an abrasive to assist in the initial ignition of the explosive.
This invention relates to an improved explosive charge and more particularly to an improved priming charge for use in delay electric blasting caps.
A substance introduced into an explosive compound so as to reduce the explosive's sensitivity to initiation by impact s frictions a primer. Heat, or by detonation of dgtonation the almost instantaneous decomposition of an explosive, either by an extremely rapid combustion or by rupture and rearrange-ment of the molecules themselves.
One useful way to think about a primer is as a mini volcano or rocket engine that spews a potent mix of hot, burning slag that mingles with the gunpowder contained within a cartridge. Since the 1920s, this mix has been formulated by combining lead styphnate, the main explosive, with an oxidizer, barium nitrate (which adds oxygen to the flame).
Initiation of an explosive train, on the other hand, is aided by the use of the most brisant primer in order to build up the detonation rates as rapidly as possible. 1 commercial formulations - commercial priming compositions today can best.
Priming compositions for firearms ammunition are mixtures which, when subjected to percussion, provide a sudden burst of flame that serves to ignite the propellant within the cartridge case. A priming composition must deliver a relatively large volume of hot gases and hot solid particles without the development of a detonating wave.
If one gets jammed up and goes off, you won’t want flame, gas, or primer bits going into your eyes. If you use a primer feed tube, as on a progressive reloading press, it’s possible that some weird sequence of events can set off the whole tube, so be careful.
25 jun 2008 the priming of bulk delivered explosives in indian mines uses the conventional petn/tnt-based boosters.
Energetic explosive comprising of a mixture of petn a purpose manufactured detonating cord cutter primer than can safely and easily be used in the blast.
Basewax™ blends are used to modify the continuous fuel oil phase of emulsions explosives such as anfo to form a stable and consistent explosive compound.
Boxer primer cups have a small bit of primary explosive material inside the base. When the firing pin hits the base of the primer cup, the unstable stuff is driven into the anvil portion of the primer, thereby igniting the primer compound.
Primer is a unit of cap-sensitive explosive used to initiate other explosives or blasting agents. A primer contains a detonator or other initiating device such as detonating cord.
The devices that use initiating and booster explosives to ignite a propelling charge or detonate a projectile burster charge are called primers and detonators, respectively. Remember, the terms primer and detonator describe a device that contains explosives, not the explosives themselves.
Among the primers, lead azide can be counted as the most used both in military and civilian applications.
Propellant, which reacts by deflagration rather than detonation when ignited and used in its normal manner.
How do liquid explosives work? this type of explosive is simply a chemical compound that in liquid form is relatively unstable.
It may also contain one or more of the following: a pyrotechnic substance, a propelling charge with primer and igniter charge, or a fuze with burster or expelling charge.
Epc-uk supply explus tsr primers in 50mm and 35mm diameter cartridges. This explosive is suitable for use as a primer for initiating ammonium nitrate based.
Sensitivity is a measure of the ease with which an explosive can be detonated by heat, friction or shock and of its ability to propagate that detonation. 2, modern commercial explosives can be grouped into two main categories according to their sensitivity, detonator sensitive explosives and blasting agents.
A capped fuse, electric exploder, or other source of ignition inserted in a cartridge of explosive.
Don't use two kinds of explosives in the same bore hole, except where one is used as a primer to detonate the other, as where dynamite is used to detonate judson powder. The quicker explosive may open cracks in the rock and allow the slower to blow out through these cracks, doing little or no work.
Of the delay is the primer, an explosive (generally lead azide, mercury fulminate, or pentaerythritol tetranitrate [petn]) that, upon detonation, releases a great deal of energy in a very short time. This is sufficient to ignite the larger amount of anfo explosive packed into the hole.
For the purpose of this subchapter, a description of the following terms is provided for information only.
This explosives primer was developed from published and unpublished sources. If quoted, please cite date and time as changes will be made as new information becomes available or is cleared for public distribution. Department of health and human services and the centers for disease control and prevention, 2006.
– requires very little priming charge to initiate detonation uses: – primarily high explosive military warheads, mines, demolition explosives.
Explosive means a substance that is made, manufactured or used to produce an explosion or detonation, including but not limited to blasting explosives,.
Senatel™ powerfrag™ is a water resistant packaged explosive designed for priming applications, and as a medium density column explosive,.
Because of their insensitivity, blasting agents should be detonated by a primer of high explosive. Ammonium nitrate- fuel oil has largely replaced dynamites and gelatins in bench blasting.
The lead azide was chosen due its singular explosive characteristics (very sensitive, which makes lead azide the explosive of choice as a primer in several applications.
Blasting cap - a small tube filled with detonating substances; used to detonate high explosives. Detonating device, detonator, cap - a mechanical or electrical.
A primer is a unit of a cap sensitive explosive equipped with a detonator or detonating cord and is used to initiate other explosives, and a booster is a unit of a cap sensitive explosive without a detonator.
This is a key feature because it allows the primary explosive charge (whether in a detonator, primer, or other initiator) to be kept small, which is an important aspect to safety and handling of munitions.
Blasting cap, also called detonator, device that initiates the detonation of a charge of a high explosive by subjecting it to percussion by a shock wave. In strict usage, the term detonator refers to an easily ignited low explosive that produces the shock wave, and the term primer, or priming composition, denotes a substance that produces a sudden burst of flame to ignite the detonator.
1 jul 2005 be used as primer to initiate bulk delivered emulsion explosives used and maintain the stable detonation process in the column explosives.
Primer igniter, an outer casing, explosive material and a conical liner. The detonator perforating involves the use of high-order explosives, which must be han-.
Although terrorist use of chemical, radiological, or biological weapons is possible, historical analysis consistently demonstrates that the most likely terrorist weapon causing a mass casualty event is a standard explosive device detonated in a crowded area. The medical basis for management of such casualties is herein described.
Detonation pressure is a function of the detonation velocity and density of an explosive.
Explosives are substances that undergo a rapid oxidation reaction with the production of found in blasting caps or primers used to detonate other explosives.
Small arms ammunition primers - small percussion-sensitive explosive charges, encased in a cup, used to ignite propellant powder.
Petn is a high explosive with a very high rate of detonation and commonly used as a primer or booster.
Explosive and incendiary (fire) bombs are further characterized based on their source. “manufactured” implies standard military-issued, mass produced, and quality-tested weapons. “improvised” describes weapons produced in small quantities, or use of a device.
A very quick primer on explosives: most explosives are composed of cnoh: carbon, nitrogen, oxygen, and hydrogen. For example, the chemical formula for rdx is c 3 h 6 n 6 o 6 rdx may not be as well-known as tnt (c 7 h 5 n 3 o 6 ), but you have almost certainly heard of it when it is mixed with other ingredients.
Definition of primer (entry 2 of 2) 1 a device for priming especially a cap, tube, or wafer containing percussion powder or compound used to ignite an explosive charge.
Aluminized mixes may also be used as a high-energy toe load and as the main column charge.
This document contains recommendations for the use of explosives in avalanche be used in combination with a primer assembly to make anfo.
Safe job procedures for the transportation, use, and storage of explosives, blasting agents, primers, and detonators.
(14) primed cartridge means a cartridge of explosives to which a detonator has been attached as a means of firing, and intended to be placed in the bore hole or other explosive chamber for the purpose of exploding the remainder of the charge.
This primer introduces information relevant to the care of casualties from explosives and blast injuries. Recovery this mission area focuses on the ability to assist communities in recovering effectively following a disaster.
Regardless of where the primer is placed in a column of explosives, the explosive end or blown from the hole when multiple-hole delay blasting is being used.
An improvised explosive device (ied) attack is the use of a homemade bomb and/or destructive device to destroy, incapacitate, harass, or distract. Ieds are used by criminals, vandals, terrorists, suicide bombers, and insurgents. Because they are improvised, ieds can come in many forms, ranging from a small pipe bomb to a sophisticated device capable of causing massive damage and loss of life.
Anvil – deformation of the cup by the firing pin compresses the friction-sensitive explosive against the anvil, starting detonation, forcing hot material into the gunpowder in the case. Depending on the type of priming system, the anvil is located in the cartridge, between the cartridge and the primer or directly in the primer itself.
The explosive contains a colour substance for pre-explosion detection. It is used for demolition works, under water blasting works (to 100 m), special blasting.
Most of the high explosives, permitted explosives and slurry explosives used in the mines have a velocity of detonation ranging between 2500 and 5000 metres per second.
A primer is a unit of cap-sensitive explosive used to initiate other explosives or blasting agents. A booster is often cap sensitive, but does not contain a detonator.
In addition to the large losses of life and property resulting from an improper use of explosives in mining, the recent statistics of the railway bureau for the safe transportation of explosives have shown more than 400 persons killed or injured and over $3,000,000 worth of property destroyed by explosives in transit by rail.
903(r) detonators, primers, and other explosives shall be carried in separate containers when transported.
The modern primer we use today is the culmination of nearly 800 years of development. From the first glowing matches through the flintlock, percussion caps and now primers, the objective has been.
Available primers today use either lead styphnate or lead azide as the primary explosive. The ideal primer commercial primers are amazingly reliable devices with a failure rate of less than 1 in 3 million.
The use of explosive ordnance disposal procedures on a munition that contains primer and powerful enough to cause detonation of the main explosive filling.
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A blaster who has any explosives-flammability concerns must discuss them with the explosives’ manufacturer(s). As a measure of an explosive’s capacity to create fire from an open flame carried by its detonation years ago, permissible explosives were developed for use in underground coal and other gassy mines.
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