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PROPERTIES OF SMOKELESS POWDER

Smokeless powders, or propellants, are essentially mixtures of chemicals designed to burn under controlled conditions at the proper rate to propel a projectile from a gun. Smokeless powders are made in three forms: 1. large pistol primers for sale UK, Thin, circular flakes or wafers 2. Small cylinders, both perforated and unperforated 3. Small spheres or flattened spheres Single-base smokeless powders derive their main source of energy from nitrocellulose. winchester large rifle primers. federal 210m primers for sale uk

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The energy released from double-base smokeless powder is derived from both nitrocellulose and nitroglycerin. All smokeless powders are extremely flammable; by design, large pistol primers for sale UK, they are intended to burn rapidly and vigorously when ignited. Oxygen from the air is not necessary for the combustion of smokeless powders since they contain sufficient built-in oxygen to burn completely, even in an enclosed space such as the chamber of a firearm. Ignition occurs winchester large rifle primers when the powder granules are heated above their ignition temperature. This can occur by exposing the powder to 1. A flame such as a match or a primer flash.

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An electrical spark or the sparks from welding, grinding, etc. 3. Heat from an electric hot plate or a fire directed against or near a closed container even if the powder itself is not exposed to the flame. When smokeless powder burns, large pistol primers for sale UK, a great deal of gas at high temperatures is formed. If the powder is confined, this gas will create pressure in the surrounding structure. The rate of gas generation is such, however, that the pressure can be kept at a low level if sufficient space is available or if the gas can escape. winchester large rifle primers

In this respect, smokeless powder differs from blasting agents or high explosives such as dynamite or blasting gelatin, although powder may contain chemical ingredients common to both of these products. federal 210m primers for sale uk, the smokeless powder does not detonate like high explosives as it has a controlled rate of burn and differs considerably in its burning characteristics from common “black powder.” Black powder burns at essentially the same rate out in the open (unconfined) as when in a gun.

HOW TO CHECK SMOKELESS POWDER FOR DETERIORATION | winchester large rifle primers

Although modern smokeless powders contain stabilizers and are basically free from deterioration under proper storage conditions, safe practices require a recognition of the signs of deterioration and its possible effects.

Deteriorating smokeless powders produce an acidic odor and may produce a reddish-brown fume. (Don’t confuse this with common solvent odors such as alcohol, ether, and acetone.) Dispose of deteriorating smokeless powders immediately. Check to make certain that smokeless powder is not exposed to extreme heat as this may cause deterioration. federal 210m primers for sale uk

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Such exposure produces an acidity that accelerates further reaction and has been known, because of heat generated by the reaction, to cause spontaneous combustion. Never salvage powder from old cartridges and do not attempt to blend salvaged powder with new powder or attempt to blend two types of powder to make a “custom” blend. Don’t accumulate old powder stocks.

RECOMMENDATIONS FOR STORAGE OF SMOKELESS POWDER

Store in a cool, dry place. Be sure the storage area selected is free from any possible sources of excess heat and is isolated from open flames, furnaces, hot water heaters, etc. Do not store smokeless powder where it will be exposed to the sun’s rays. Avoid storage in areas where mechanical or electrical equipment is in operation. Restrict the storage areas’ heat or sparks which may result from improper, defective, or overloaded electrical circuits. winchester large rifle primers

Do not store the smokeless powder in the same area with solvents, flammable gasses, or highly combustible materials. Store only in Department of Transportation-approved containers. Do not transfer the smokeless powder from an approved container into one which is not approved. Do not smoke in areas where the smokeless powder is stored or used. Place appropriate “no smoking” signs in these areas. Do not subject the storage cabinets to close confinement. Storage cabinets should be constructed of insulating materials and with a weak wall, seams, or joints to provide an easy means of self-venting.

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Do not keep old or salvaged powders. Check old powders for deterioration regularly. Destroy deteriorated powders immediately. Obey all regulations regarding quantity and methods of storing. Do not store all your smokeless powders in one place. If you can, maintain separate storage locations. Many small containers are safer than one large container. Keep your storage and use area clean. Clean up spilled smokeless powder promptly. Make sure the surrounding area is free of trash or other readily combustible materials. winchester large rifle primers

Origin and Development of NFPA 495

This code was originally issued in 1912 as the Suggested State Law to Regulate the Manufacture, Storage, Sale, and Use of Explosives. The second edition was issued in 1941 by the Committee on laws and Ordinance and retitled Suggested Explosives Ordinance for Cities. Later, the document number NFPA 495L was designated.

After being assigned to the Committee on Chemicals and Explosives, a new edition was issued in 1959. This was retitled as the Code for the Manufacture, Transportation, Storage, and Use of Explosives and Blasting Agents and redesigned as NFPA 495. Following the reorganization of the committee in 1960, the responsibility for amendments to NFPA 495 was assigned to the Sectional Committee on Explosives. federal 210m primers for sale uk