In common usage, the word fuse is used indiscriminately. Explosives shall not be delivered to or received from any railway station, truck terminal, pier, wharf, harbor facility, or airport terminal between the hours of sunset and sunrise. 1926.907 - Use of safety fuse. | Occupational Safety and Health Mixing and packaging equipment shall be constructed of materials compatible with the fuel-ammonium nitrate composition. Every motor vehicle transporting any quantity of Class A or Class B explosives shall, at all times, be attended by a driver or other attendant of the motor carrier. Class C explosives. It comes in spools similar to the one seen above. Originally it consisted of a "tube" of gunpowder surrounded by a waterproofed varnished jute "rope." When fuse is used, the blasting cap shall be securely attached to the safety fuse with a standard-ring type cap crimper. Length:100 x 4" Pieces Vehicles transporting blasting agents shall only be driven by and be in charge of a driver in possession of a valid motor vehicle operator's license. Oxidizers of small particle size, such as crushed ammonium nitrate prills or fines, may be more sensitive than coarser products and shall, therefore, be handled with greater care. Magazines shall be ventilated sufficiently to prevent dampness and heating of stored explosives. Safety Fuse. In areas where lightning storms are prevalent, lightning protection shall be provided. A wood wedge and a fiber, rubber, or wood mallet shall be used for opening or closing wood packages of explosives. 6 When the ammonium nitrate must be counted in determining the distances to be maintained from inhabited buildings, passenger railways and public highways, it may be counted at one-half its actual weight because its blast effect is lower. The grounding conductor to all such electrical equipment shall be effectively bonded to the service-entrance ground connection and to all equipment ground connections in a manner so as to provide a continuous path to ground. Combustible materials shall not be stored within 50 feet of magazines. Nitrate-water solutions may be stored in tank cars, tank trucks, or fixed tanks without quantity or distance limitations. The front marking or placard may be displayed on the front of either the truck, truck body, truck tractor or the trailer. Primer Cord (or Prima Cord - remember, that's just a brand name) is not a fuse; it's an explosive. The land surrounding magazines shall be kept clear of brush, dried grass, leaves, and other materials for a distance of at least 25 feet. "[7] Bickford had developed a fuse which would burn for a known length of time, depending on the length of the fuse. n)] from combined masses toM1, add the products of the individual masses and distances and divide the total by the sum of the masses thus: This article is about simple fuses for detonating explosives. Heating units which do not depend on combustion processes, when properly designed and located, may be used in the building. Safety Fuse - CDET Explosive Industries This paragraph does not apply to in-process storage and intraplant transportation during manufacture of small arms ammunition, small arms primers, and smokeless propellants. Water gel (Slurry) explosives and blasting agents -. Operation of bulk delivery and mixing vehicles shall comply with the requirements of this subdivision. Small arms ammunition. The hauling of either blasting caps or other explosives but not both, shall be permitted on bulk trucks provided that a special wood or nonferrous-lined container is installed for the explosives. Blasting caps or electric blasting caps shall not be transported over the highways on the same vehicles with other explosives, unless packaged, segregated, and transported in accordance with the Department of Transportation's Hazardous Materials Regulations (49 CFR parts 177-180). 26 gage. GPO Source: e-CFR 1926.907 (a) Safety fuse shall only be used where sources of extraneous electricity make the use of electric blasting caps dangerous. Due to the corrosive and reactive properties of ammonium nitrate, and to avoid contamination, galvanized iron, copper, lead, and zinc shall not be used in a bin construction unless suitably protected. Bins containing ammonium nitrate shall be separated from blasting agent storage and explosives storage in conformity with Table H-22. The location chosen for water gel or ingredient transfer from a support vehicle into the borehole loading vehicle shall be away from the blasthole site when the boreholes are loaded or in the process of being loaded. Vehicles transporting explosives shall avoid congested areas and heavy traffic. Accumulation of spilled product on the ground shall be prevented. Explosives shall not be permitted inside of or within 50 feet of any building or facility used for the mixing of blasting agents. In an explosive, pyrotechnic device, or military munition, a fuse (or fuze) is the part of the device that initiates function.In common usage, the word fuse is used indiscriminately. However, when two or more safety fuses in a group are lighted as one by means of igniter cord, or other similar fuse-lighting devices, they may be considered as one fuse. Initiating Devices - Petro-Explo Class II magazines may be used where the quantity of explosives stored is 50 pounds or less. 20 gage. When tests on specific formulations of water gels result in Department of Transportation classification as a Class B explosive, bullet-resistant magazines are not required, see paragraph (c)(2)(ii) of this section. A motor vehicle used for transporting explosives shall be given the following inspection to determine that it is in proper condition for safe transportation of explosives: Fire extinguishers shall be filled and in working order. n)=M2XD12+M3XD12. The so-called "drop fuse" method of dropping or pushing a primer or any explosive with a lighted fuse attached is forbidden. It was not until 1574 that gunpowder was first introduced to the mining industry,[2] and it took until 1617 before it was first used in a large-scale mining operationat Thillot in France. Scope. Mixing equipment shall comply with the requirements of this subdivision. All surfaces shall be accessible for cleaning. Forbidden or not acceptable explosives. Natural barricades, such as hills or timber of sufficient density that the surrounding exposures which require protection cannot be seen from the donor when the trees are bare of leaves, are also acceptable. No unused cap or short capped fuse shall be placed in any hole to be blasted; such unused detonators shall be removed from the working place and destroyed. Particular attention shall be given to the clearances on all moving parts. Examples of explosive-actuated power devices are jet tappers and jet perforators. Safety fuses are used to initiate the detonation of explosives through the use of a blasting cap. 3 The distances in the table apply to ammonium nitrate that passes the insensitivity test prescribed in the definition of ammonium nitrate fertilizer promulgated by the National Plant Food Institute*; and ammonium nitrate failing to pass said test shall be stored at separation distances determined by competent persons. Edges of metal covers shall overlap sides at least 1 inch. This paragraph does not apply to storage under the jurisdiction of and in compliance with the regulations of the U.S. Coast Guard (see 46 CFR parts 146-149). Second, by attaching an electrical wire onto the blasting cap and producing a current which would travel from the source to the blasting cap. All nails exposed to the interior of the magazine shall be well countersunk. Ingredients of water gels shall conform to the requirements of this subdivision. Burn Rate: 25 sec/ft Furthermore, explosives do not distinguish between initiating energy supplied accidentally or deliberately. Commercial explosives are those explosives which are intended to be used in commercial or industrial operations. Selecting the right ignition fuse can be confusing. 1 These distances apply to the separation of stores only. The blasting safety fuse, employed to fire an explosive from a distance or after a delay, is a hollow cord filled with a mixture resembling black powder and designed to propagate burning at a slow and steady rate. Magazines used only for storage of black powder, Class B and Class C explosives shall be weather resistant, fire-resistant, and have ventilation. those which contain no ingredient classified as an explosive; these are sensitized with metals such as aluminum or with other fuels. Before a blast is fired, the employer shall require that a loud warning signal be given by the person in charge, who has made certain that all surplus explosives are in a safe place, all persons and vehicles are at a safe distance or under sufficient cover, and that an adequate warning has been given. Bins shall be clean and free of materials which may contaminate ammonium nitrate. The roof coverings shall be Class C or better, as defined in the Manual on Roof Coverings, NFPA 203M-1970, which is incorporated by reference as specified in 1910.6. The body shall be constructed of noncombustible materials. Vehicles used for transporting explosives shall be strong enough to carry the load without difficulty and be in good mechanical condition. The land surrounding the mixing plant shall be kept clear of brush, dried grass, leaves, and other materials for a distance of at least 25 feet. All nails exposed to the interior of magazines shall be well countersunk. Table H-21 - American Table of Distances for Storage of Explosives1-5, [As revised and approved by the Institute of Makers of Explosives, June 5, 1964]. Vehicles used to transport bulk premixed blasting agents on public highways shall have closed bodies. Nonsparking metallic slitters may be used for opening fiberboard cases. 2 Artificial barricade means an artificial mound or revetted wall of earth of a minimum thickness of three feet. Magazines for storage of blasting and electric blasting caps shall be weather resistant, fire-resistant, and ventilated. 8 test blasting cap at regular intervals and after every change in formulation. Spilled materials shall be cleaned up promptly and safely removed. To find weighted distance [D1(2,3. +Mn. Floors shall be constructed so as to eliminate floor drains and piping into which molten materials could flow and be confined in case of fire. Length: 30Feet - Precut into 3ft sections!! Blasting agents, when stored entirely separate from explosives, may be stored in the manner set forth in paragraph (c) of this section or in one-story warehouses (without basements) which shall be: Constructed so as to eliminate open floor drains and piping into which molten materials could flow and be confined in case of fire; Equipped with a strong door kept securely locked except when open for business. There are three fundamental types: mechanical, nuclear, and chemical. 1910.109 - Explosives and blasting agents. These comprise a wide variety of materials used for blasting. Hollow masonry units used in construction required to be bullet resistant shall have all hollow spaces filled with weak cement or well-tamped sand. (See the Lightning Protection Code, NFPA 78-1968, which is incorporated by reference as specified in 1910.6.). Peroxides and chlorates shall not be used. Alfred Nobel created dynamite in 1867, by moulding nitroglycerine and a mud-like compound found near his laboratories called kieselguhr into individual cylinders. After earlier attempts at developing a safer way had failed, Bickford had an insight while visiting his friend who was a ropemaker. Length:20Feet The method used by miners to blast away rock involved drilling several holes across a rock face which would be filled with charges of gunpowder. These matches are designed to be used with and electrical firing system. It is made in a standard diameter designed to be crimped into blasting caps (Detonators). Small arms ammunition primers. The manufacture of pyrotechnics as defined in paragraph (a)(10) of this section shall also meet the requirements contained in 1910.119. Explosives shall not be transferred from one vehicle to another within the confines of any jurisdiction (city, county, State, or other area) without informing the fire and police departments thereof. What speed do I need? Warehouses used for the storage of blasting agents shall be located in Table H-22 with respect to one another. However, when being specific (and in particular in a military context), the term fuse describes a simple pyrotechnic initiating device, like the cord on a firecracker whereas the term . [4], If a spark was created, the results could be disastrous to the work force, and this was a common occurrence. Metal powders such as aluminum shall be kept dry and shall be stored in containers or bins which are moisture-resistant or weathertight. The placarding requirements contained in DOT regulations apply to vehicles carrying water gel explosives or blasting agents. Magazines as required by this paragraph shall be of two classes; namely, Class I magazines, and Class II magazines. Safety precautions at mixing plants shall include the requirements of this subdivision. No person shall be allowed to smoke, carry matches or any flame-producing device, or carry any firearms while in or about bulk vehicles effecting the mixing, transfer, or down-the-hole loading of water gels at or near the blasting site. This includes keeping weeds and other combustible materials cleared within 25 feet of such bin. The design of the mixer shall minimize the possibility of frictional heating, compaction, and especially confinement. A daily visual inspection shall be made of mixing, conveying, and electrical equipment to establish that such equipment is in good operating condition. The magazine heating systems shall meet the following requirements: The radiant heating coils within the building shall be installed in such a manner that the explosives or explosives containers cannot contact the coils and air is free to circulate between the coils and the explosives or explosives containers.