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Topic: Blasting cap


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In the News (Tue 21 May 19)

  
  Blasting cap - Wikipedia, the free encyclopedia
Solid pack electric blasting caps use a thin bridge wire in direct contact (hence solid pack) with a primary explosive, which is heated by electric current and causes the detonation of the primary explosive.
Match type blasting caps use an electric match (insulating sheet with electrodes on both sides, a thin bridgewire soldered across the sides, all dipped in ignition and output mixes) to initiate the primary explosive, rather than direct contact between the bridge wire and the primary explosive.
The first blasting cap or detonator was demonstrated in 1745, when a Dr. Watson of the Royal Society showed that the electric spark of a Leyden Jar could ignite fl powder.
en.wikipedia.org /wiki/Blasting_cap   (1422 words)

  
 J. Roy's Inc. - For All Your Drilling & Blasting Needs
A blasting cap with an integral delay element in conjunction with and capable of being detonated by a detonation impulse or signal from miniaturized detonating cord.
When connecting a blasting cap or an electric blasting cap to detonating cord, the cap shall be taped or otherwise attached securely along the side or the end of the detonating cord, with the end of the cap containing the explosive charge pointed in the direction in which the detonation is to proceed.
Before a blast is fired, a loud warning signal shall be given by the blaster in charge, who has made certain that all surplus explosives are in a safe place and all employees are in a safe place and all employees, vehicles, and equipment are at a safe distance, or under sufficient cover.
www.jroysinc.com /blasting.htm   (5561 words)

  
 Blasting Cap Safety   (Site not responding. Last check: 2007-10-13)
Blasting is necessary in mining, stone, rock and gravel quarrying, lumbering; road and rail construction; digging foundations; seismographic exploration; tunneling; irrigation and flood control; and demolition.
Theft and vandalism are usually responsible for the few blasting caps which are found by children or uninformed persons.
Blasting caps are designed to explode with tremendous force to detonate commercial explosives.
www.sccfd.org /pub_ed/blasting_caps.html   (213 words)

  
 OVER SEAS January 2001: The Business of Blast Fishing
Blasting caps, on the other hand, may only be sold to licensed blast foremen of quarrying, mining or construction companies.
What is most certain is that the blasting caps used for blast fishing come from Talisay, a city south of Cebu City and the center of a backyard industry that manufactures in commercial quantities what has come to be known as the "Talisay Blasting Cap" or TBC.
A safety fuse is a medium through which a flame is conveyed for direct firing of an explosive charge, in the case of the blasting cap, to detonate the explosive mixture.
www.oneocean.org /overseas/200101/the_business_of_blast_fishing.html   (2053 words)

  
 Blasting caps (Gerald L. Hurst)
The cap achieves this by exploding and generating a very high shock pressure which compresses a small portion of the explosive material so rapidly that the shock continues to propagate through the charge, being sustained by the rapid chemical reaction initiated by the original shock.
Electric caps have a couple of wires bridged by a fine filament precrimped into the open end of the cap shell to make the assembly waterproof In practice the filament may be coated with match material to assure contact for ignition.
Caps below number 6 are only used for the limited purpose of establishing the minimum sensitivity of explosives in the laboratory and there is no universal standard for the strength of such caps.
yarchive.net /explosives/blasting_cap.html   (3489 words)

  
 805 KAR 4:110. Initiation of explosive charges; electric blasting.
(3) In any single blast using electric blasting caps, all caps shall be of the same style or function, and of the same manufacture.
(4) Electric blasting shall be carried out by using blasting circuits or power circuits in accordance with the electric blasting cap manufacturer's recommendations, or those of an approved contractor or his designated representative.
(18) Whenever the possibility exists that a leading line or blasting wire might be thrown over a live powerline by the force of an explosion, care shall be taken to see that the total length of wires are kept too short to hit the lines, or that the wires are securely anchored to the ground.
www.lrc.state.ky.us /kar/805/004/110.htm   (1255 words)

  
 Quarryology 101: Lesson 7: Part 1 - Pit & Quarry   (Site not responding. Last check: 2007-10-13)
Inside the cap the leg wires are joined by a short piece of fine resistance wire called a "bridge wire." The bridge wire may be imbedded either directly into an ignition mixture or in an electric match.
Thus, the electric blasting cap converts a relatively small amount of electrical energy into a primary-initiating explosion capable of detonating cap-sensitive high explosives with which it is in intimate contact.
Delay electric caps are similar to instantaneous caps in construction and action, except that between the ignition charge and the primer charge there is a column of powder called a "delay charge" which serves as a time fuse.
www.pitandquarry.com /pitandquarry/article/articleDetail.jsp?id=17978   (3915 words)

  
 Coastal City is Hub of Underground Explosives Trade
The cylinder, which is the blasting cap, is next implanted in a mixture consisting of more explosives, mainly ammonium nitrate, inside a bottle from whose mouth protrudes the fuse.
No dynamite will explode without a detonating device called the blasting cap, which is actually made in two stages: the formation of the cylinder cap, which by itself is not illegal, since it does not yet contain explosives; and the mixing of the primary explosive and safety fuse.
As a result, many families turned to making blasting caps as their primary source of livelihood, and while some locals still practice blast fishing, many residents say outsiders are the biggest buyers of the blasting caps.
www.pcij.org /stories/2005/blastingcap.html   (2304 words)

  
 FM 23-23 Chptr 2 Mechanical Training
Another electric blasting cap can be attached to the firing wire and the M57 device can be used to fire other devices, such as fougasse bombs and demolition charges, provided no more than 100 feet of firing wire and one M6 blasting cap are used.
Instructions for laying, aiming, and arming the mine using two nonelectric M7 blasting caps, a piece of detonating cord approximately 25 feet long, a pull wire, and a pull-type or pull release-type firing device, such as the M1 or the M3 is discussed in a and b below.
If the blasting cap is detonated during testing, it can be replaced by a standard electric blasting cap attached to the remaining firing wire.
www.globalsecurity.org /military/library/policy/army/fm/23-23/CH2.htm   (3635 words)

  
 Blasting Caps
This shock wave is initially produced by the blasting cap and is continued throughout the explosive charge as the detonation progresses.
Fuse caps are blasting caps that are fired by the flame from a safety fuse.
The cap case would then be ready to insert the fuse and load with the explosive charges.
www.angelfire.com /co2/contem/blasting.html   (13228 words)

  
 Blasting-Cap Production Spreads to Nearby Towns
This is the same city where officials have cited extreme poverty to justify the leniency accorded to those engaged in the illegal manufacture of blasting caps, which have been used not only in dynamite fishing, but also in terrorist activities that have resulted in several deaths.
The trade in legal blasting caps, which are used generally for mining or construction operations, is regulated, and buying, selling, and transporting them requires a permit from the Philippine National Police.
According to some local authorities and NGO workers, those making a real killing are the financiers, who also sell the blasting caps and ammonium nitrate wholesale, as well as the retailers who often double their investments.
www.pcij.org /stories/print/2005/blastingcap2.html   (1582 words)

  
 [No title]   (Site not responding. Last check: 2007-10-13)
The hole should be deep enough that the blasting cap is totally within the explosive.
Place blasting cap on one end of the fuse cord and crimp with pliers.
Insert the blasting cap in the hole in the block of explosive.
www.angelfire.com /nc2/HeavyMusic/145.htm   (223 words)

  
 FM 21-75 Appendix B
Clear the cap well of a block of TNT or push a hole about the size of a blasting cap (3 cm [1 1/3 in] deep and.65 cm [1/4 in] in diameter) in a block of C4 explosive.
Gently slip the blasting cap over the fuse so that the flash charge in the cap is in contact with the end of the time fuse.
Insert the cap into the cap well of the TNT and secure it with the priming adapter, or insert the cap into the hole made in the C4 and mold the explosive around the cap.
www.globalsecurity.org /military/library/policy/army/fm/21-75/Appb.htm   (1235 words)

  
 Fish and Wildlife Service Manual, 241fw4, Safety Operations - Explosives   (Site not responding. Last check: 2007-10-13)
A material designed for blasting which has been tested in accordance with the tests contained in the Transportation Safety Act and found to be so insensitive that there is very little probability of accidental initiation to explosion or of transition from deflagration to detonation.
(1) When connecting a blasting cap to the detonating cord, the cap is taped securely along the side or the end of the cord with the end of the cap containing the explosive charge pointed in the direction in which the detonation is to proceed.
Blasting caps (including electric blasting caps) will not be transported in the vehicle or conveyance with other explosives unless the conditions of 49 CFR 177.835(g) can be met.
www.fws.gov /policy/241fw4.html   (3137 words)

  
 [No title]
To manufacture these caps the explosives are simply pressed into the cap container.
Simple caps can be loaded similarly with the deletion of the base charge in the loading.
These caps should also be dipped into molten wax to ensure their "waterproofness".
www.textfiles.com /anarchy/INCENDIARIES/kibc.txt   (13329 words)

  
 [No title]
Place fuse cord with blasting cap into the opposite end so the\at the blasting cap is near the center of the pipe.
If non-electric cap is used be sure cap is crimped around fuze and fuze is long enough to pro- vide safe delay.
If non-electric cap is used, be sure cap is crimped around fuse and fuse is long enough to pro- vide safe delay.
www.textfiles.com /anarchy/imh2.txt   (3004 words)

  
 The Manila Times Internet Edition | SPECIAL REPORT > Blasting-cap production spreads to nearby towns
This is the same city where officials have cited extreme poverty to justify the lenience given to those making illegal blasting caps, which have been used not only in dynamite fishing but in terrorist activities that have resulted in several deaths.
The trade in legal blasting caps, which are used generally for mining or construction, is regulated, and buying, selling and transporting them require a permit from the Philippine National Police.
According to some local authorities and NGO workers, those making a real killing are the financiers, who also sell the blasting caps and ammonium nitrate wholesale, and the retailers, who often double their investments.
www.manilatimes.net /others/special/2005/mar/15/20050315spe1.html   (1508 words)

  
 Blasting Cap Tins   (Site not responding. Last check: 2007-10-13)
Most cap tins are completely empty, but once in a great while they are found containing caps.
Blasting cap tins are metal containers that were used to store detonators.
Blasting caps are needed to detonate high explosives used in mining, construction, warfare, etc. Since the caps contain a sensitive explosive, they were stored in sturdy metal containers to prevent accidental explosions.
www.nmt.edu /~tromero/caps/tins.html   (207 words)

  
 Blasting, blasting cap accident, blasting media   (Site not responding. Last check: 2007-10-13)
Grit blast abrasives are used to clean and prepare substrates prior to painting/coating or repair.
The course focuses on drilling and blasting as it is applied in surface mines and quarries.
Blasting our way to peace Justice has been redefined as success in a war that is sounding a retreat from civilisation George Monbiot...
www.businessservicesite.com /blasting.html   (1032 words)

  
 1926.914 Definitions applicable to this subpart.
(e) Blasting agent -- A blasting agent is any material or mixture consisting of a fuel and oxidizer used for blasting, but not classified an explosive and in which none of the ingredients is classified as an explosive provided the furnished (mixed) product cannot be detonated with a No. 8 test blasting cap when confined.
A common blasting agent presently in use is a mixture of ammonium nitrate (NH 3) and carbonaceous combustibles, such as fuel oil or coal, and may either be procured, premixed and packaged from explosives companies or mixed in the field.
(s) Nonelectric delay blasting cap -- A blasting cap with an integral delay element in conjunction with and capable of being detonated by a detonation impulse or signal from miniaturized detonating cord.
www.setonresourcecenter.com /29CFR/1926/914.asp   (1063 words)

  
 Employ an M18A1 Claymore Mine   (Site not responding. Last check: 2007-10-13)
WARNING: The Blasting Cap That Is Attached To The Firing Wire Must Be Placed Under A Sandbag, Behind A Tree, Or In A Hole In The Ground To Protect The Person Performing The Circuit Check In Case The Blasting Cap Detonates.
(1) Place the blasting cap that is attached to the firing device under a sandbag, behind a tree, or in a hole in the ground to protect you in case the blasting cap detonates during the test.
Slide the slotted end of the shipping plug priming adapter onto the firing wires of the blasting cap between the crimped connections and the blasting cap.
www.atsc.army.mil /dld/comcor/in4425s.htm   (1666 words)

  
 The Manila Times Internet Edition | SPECIAL REPORT > Talisay is center of explosives trade
Originally meant as detonating devices for the explosives used in dynamite fishing, Talisay’s blasting caps are now not only killing fish, but sowing terror in cities as far as Manila, and perhaps even beyond Philippine borders.
The making of blasting caps here starts innocently enough: empty milk cans are formed into cylindrical containers approximately 4 centimeters in length and 5cm to 6cm in diameter.
These moves, however, seem to have hardly affected the manufacture of blasting caps here and the assembly of dynamite by unscrupulous fishers—and possibly terrorists.
www.manilatimes.net /others/special/2005/mar/14/20050314spe1.html   (2047 words)

  
 Percussion Cap Assembly Machine - Machinefabriek Verborg - Machine Building - Engineering Works - Design and Building ...
With this assembly machine Percussion / Blasting caps (metal tubes closed at one end, containing a charge of one or more detonating compounds, designed to detonate from the sparks) are inserted into their sockets.
The fifth station monitors the dimensions of the Percussion / Blasting cap socket assembly with an accuracy of +/- 0,05 mm.
Cap assemblies that haven not passed the tests are ejected at the first station so they can be examined.
www.verborg.nl /dynamite_en.html   (345 words)

  
 Youth discovers blasting cap at soccer field; UNC-CH police warn parents to be careful   (Site not responding. Last check: 2007-10-13)
The youth told a Rainbow Soccer official about the cap and she notified University of North Carolina at Chapel Hill police about 2:48 p.m.
An SBI bomb squad responded and assisted UNC-CH police in investigating and securing the blasting cap and the scene.
Such blasting caps, typically used at construction sites to remove large rocks, can be detonated electronically -- including radio signals -- and by static electricity, police said.
www.unc.edu /news/archives/mar97/blast.html   (262 words)

  
 eBay - blasting cap, Postcards Paper, Science, Medical items on eBay.com   (Site not responding. Last check: 2007-10-13)
Blasting cap can tin California San Francisco NV mining
Blasting cap can tin California Co lion Nevada mining
Blasting Galvanometer, Cap and circuit tester & Case
search-desc.ebay.com /search/search.dll?query=blasting+cap&newu=1&krd=1   (409 words)

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