What kind of explosives are commonly found in primers

Lastly, the NCDOL Library offers free safety and health videos including streaming video service and related research assistance on consensus standards i.

Other relevant resources can be found on the A-Z safety and health topics pages for exits and exit routes , hazard communication , personal protective equipment , HAZWOPER , blasting and explosives , emergency action plans , process safety management , respiratory protection and fire prevention plans. The consultative services bureau provides free and confidential onsite consultation regarding worksite safety and health hazards.

OSH has adopted the following standards which are applicable to explosives in North Carolina. Note: Please also check the standards information and activity webpage to see if there has been any recent or upcoming regulatory activity on this topic.

Compliance Directive: CPL , Process Safety Management of Highly Hazardous Chemicals - Compliance Guidelines and Enforcement Procedures , establishes enforcement policy and provides an explanation of the standard to ensure uniform enforcement. If you would like to receive interpretive guidance on this or any other OSH standard or topic, you can submit your questions using the Ask OSH web form , by e-mail to ask.

How can we make this page better for you? Explosives This page pertains to the manufacture, use and storage of explosives for other than construction-related tasks. Examples: propellant explosives including some smokeless propellants , photographic flash powders, and some special fireworks Class C explosives: Includes certain types of manufactured articles which contain Class A or Class B explosives, or both, as components but in restricted quantities.

What are the hazards associated with explosives? Serious bodily injury, death, and significant property damage due to detonation and fire. What can I do to protect myself? Employers are required to ensure that employees have been trained about the health and physical hazards of chemicals in their work areas and about any processes involving any high hazardous chemicals What resources are available to employers?

Safety and Health Programs Example programs on hazard communication , emergency action plan and fire prevention plan, respiratory protection and PPE hazard assessment can assist the employer with their hazard communication, emergency planning and identifying the appropriate personal protective equipment required in the workplace. Training and Outreach Services Presentations on hazard communication , exit routes, emergency action and fire prevention plans, respiratory protection and personal protective equipment general industry and construction can assist employers in training their staff.

A-Z Safety and Health Topics Other relevant resources can be found on the A-Z safety and health topics pages for exits and exit routes , hazard communication , personal protective equipment , HAZWOPER , blasting and explosives , emergency action plans , process safety management , respiratory protection and fire prevention plans.

Consultation Services The consultative services bureau provides free and confidential onsite consultation regarding worksite safety and health hazards. Which standards apply? General Industry 29 CFR Where can I learn more? Department of Transportation Regulations for the Transportation of Explosives. Water gels are covered in paragraph h of this section. Bins containing ammonium nitrate shall be separated from blasting agent storage and explosives storage in conformity with Table H Consider separately each donor mass in combination with each acceptor mass.

If the masses are closer than table allowance distances measured between nearest edges , the combination of masses becomes a new potential donor of weight equal to the total mass.

When individual masses are considered as donors, distances to potential acceptors shall be measured between edges. When combined masses within propagating distance of each other are considered as a donor, the appropriate distance to the edge of potential acceptors shall be computed as a weighted distance from the combined masses. Calculation of weighted distance from combined masses: Let M 2 , M 3. M n be donor masses to be combined. M 1 is a potential acceptor mass. D 12 is distance from M 1 to M 2 edge to edge.

D 13 is distance from M 1 to M 3 edge to edge , etc. To find weighted distance [ D 1 2 , 3. Propagation is possible if either an individual donor mass is less than the tabulated distance from an acceptor or a combined mass is less than the weighted distance from an acceptor.

In determining the distances separating highways, railroads, and inhabited buildings from potential explosions as prescribed in Table H , the sum of all masses which may propagate i.

However, when the ammonium nitrate must be included, only 50 percent of its weight shall be used because of its reduced blast effects. In applying Table H to distances from highways, railroads, and inhabited buildings, distances are measured from the nearest edge of potentially explodable material as prescribed in Table H, Note 5. Water gels containing a substance in itself classified as an explosive shall be classified as an explosive and manufactured, transported, stored, and used as specified for "explosives" in this section, except as noted in subdivision iv of this subparagraph.

Water gels containing no substance in itself classified as an explosive and which are cap-sensitive as defined in paragraph a of this section under Blasting Agent shall be classified as an explosive and manufactured, transported, stored and used as specified for "explosives" in this section.

Water gels containing no substance in itself classified as an explosive and which are not cap-sensitive as defined in paragraph a of this section under Blasting Agent shall be classified as blasting agents and manufactured, transported, stored, and used as specified for "blasting agents" in this section. The storage of ammonium nitrate and ammonium nitrate mixtures that are more sensitive than allowed by the "Definition of Test Procedures for Ammonium Nitrate Fertilizer" is prohibited.

The standards for ammonium nitrate nitrous oxide grade are those found in the "Specifications, Properties, and Recommendations for Packaging, Transportation, Storage, and Use of Ammonium Nitrate", available from the Compressed Gas Association, Inc.

The ammonium nitrate storage bins or piles shall be clearly identified by signs reading "Ammonium Nitrate" with letters at least 2 inches high. By Standard Number Part Number:.

Explosives and blasting agents. The land surrounding magazines shall be kept clear of brush, dried grass, leaves, and other materials for a distance of at least 25 feet. Class II magazines may be used where the quantity of explosives stored is 50 pounds or less. Footnote 2 "Artificial barricade" means an artificial mound or revetted wall of earth of a minimum thickness of three feet. Footnote 3 "Barricaded" means that a building containing explosives is effectually screened from a magazine, building, railway, or highway, either by a natural barricade, or by an artificial barricade of such height that a straight line from the top of any sidewall of the building containing explosives to the eave line of any magazine, or building, or to a point 12 feet above the center of a railway or highway, will pass through such intervening natural or artificial barricade.

Footnote 4 When two or more storage magazines are located on the same property, each magazine must comply with the minimum distances specified from inhabited buildings, railways, and highways, and in addition, they should be separated from each other by not less than the distances shown for "Separation of Magazines," except that the quantity of explosives contained in cap magazines shall govern in regard to the spacing of said cap magazines from magazines containing other explosives.

If any two or more magazines are separated from each other by less than the specified "Separation of Magazines" distances, then such two or more magazines, as a group, must be considered as one magazine, and the total quantity of explosives stored in such group must be treated as if stored in a single magazine located on the site of any magazine of the group, and must comply with the minimum of distances specified from other magazines, inhabited buildings, railways, and highways.

Footnote 5 This table applies only to the permanent storage of commercial explosives. It is not applicable to transportation of explosives, or any handling or temporary storage necessary or incident thereto.

It is not intended to apply to bombs, projectiles, or other heavily encased explosives. Two class II magazines may be located in the same building when one is used only for blasting caps in quantities not in excess of 5, caps and a distance of 10 feet is maintained between magazines. A distance of at least one hundred and fifty feet shall be maintained between class II magazines and the work in progress when the quantity of explosives kept therein is in excess of 25 pounds, and at least 50 feet when the quantity of explosives is 25 pounds, or less.

Magazines used only for storage of black powder, Class B and Class C explosives shall be weather resistant, fire-resistant, and have ventilation. Magazines for storage of blasting and electric blasting caps shall be weather resistant, fire-resistant, and ventilated. All electrical switch gear shall be located a minimum distance of 25 feet from the magazine.

The area between the heating unit and the magazine shall be cleared of all combustible materials. Thickness of masonry units shall not be less than 8 inches.

Hollow masonry units used in construction required to be bullet resistant shall have all hollow spaces filled with weak cement or well-tamped sand. Wood constructed walls, required to be bullet resistant, shall have at least a 6-inch space between interior and exterior sheathing and the space between sheathing shall be filled with well-tamped sand.

Metal wall construction, when required to be bullet resistant, shall be lined with brick at least 4 inches in thickness or shall have at least a 6-inch sandfill between interior and exterior walls.

Wood floors shall be tongue and grooved lumber having a nominal thickness of 1 inch. Sand in the sand tray shall be maintained at a depth of not less than 4 inches. All nails exposed to the interior of magazines shall be well countersunk. Ventilating openings shall be screened to prevent the entrance of sparks.

Doors for openings in magazines for Class A explosives shall be bullet resistant. Doors for magazines not required to be bullet resistant shall be designed to prevent unauthorized entrance to the magazine.

All nails exposed to the interior of the magazine shall be well countersunk. All metal magazines of this class shall have sides, bottom, and cover constructed of sheet metal, and shall be lined with three-eighths-inch plywood or equivalent. Edges of metal covers shall overlap sides at least 1 inch.

Black powder when stored in magazines with other explosives shall be stored separately. Black powder stored in kegs shall be stored on ends, bungs down, or on side, seams down. Corresponding grades and brands shall be stored together in such a manner that brands and grade marks show. All stocks shall be stored so as to be easily counted and checked. Packages of explosives shall be piled in a stable manner. When any kind of explosive is removed from a magazine for use, the oldest explosive of that particular kind shall always be taken first.

Tools used for opening packages of explosives shall be constructed of nonsparking materials, except that metal slitters may be used for opening fiberboard boxes.

A wood wedge and a fiber, rubber, or wood mallet shall be used for opening or closing wood packages of explosives. Opened packages of explosives shall be securely closed before being returned to a magazine. Brooms and other cleaning utensils shall not have any spark-producing metal parts. Sweepings from floors of magazines shall be properly disposed of. Magazine floors stained with nitroglycerin shall be cleaned according to instructions by the manufacturer.

Only experienced persons shall be allowed to do the work of destroying explosives. In making outside repairs, if there is a possibility of causing sparks or fire the explosives shall be removed from the magazine.

Explosives removed from a magazine under repair shall either be placed in another magazine or placed a safe distance from the magazine where they shall be properly guarded and protected until repairs have been completed, when they shall be returned to the magazine.

The land surrounding a magazine shall be kept clear of all combustible materials for a distance of at least 25 feet. Combustible materials shall not be stored within 50 feet of magazines. Caps recovered from blasting misfires shall not be reused.

Such explosives and caps shall then be disposed of in the manner recommended by the manufacturer. In the event of breakdown or collision the local fire and police departments shall be promptly notified to help safeguard such emergencies. Explosives shall be transferred from the disabled vehicle to another only, when proper and qualified supervision is provided. If vehicles do not have a closed body, the body shall be covered with a flameproof and moistureproof tarpaulin or other effective protection against moisture and sparks.

All vehicles used for the transportation of explosives shall have tight floors and any exposed spark-producing metal on the inside of the body shall be covered with wood or other nonsparking materials to prevent contact with packages of explosives. Packages of explosives shall not be loaded above the sides of an open-body vehicle. Class B explosives. Explosives, Class B, and quantity. Explosives B Red letters on white background.

Oxidizing material blasting Oxidizers Yellow letters agents, ammonium nitrate, etc. The front marking or placard may be displayed on the front of either the truck, truck body, truck tractor or the trailer. Refer to Extinguishers shall be examined periodically by a competent person.

This attendant shall have been made aware of the class of the explosive material in the vehicle and of its inherent dangers, and shall have been instructed in the measures and procedures to be followed in order to protect the public from those dangers.

He shall have been made familiar with the vehicle he is assigned, and shall be trained, supplied with the necessary means, and authorized to move the vehicle when required. Department of Transportation regulations.