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A flame arrester during testing A flame arrester made for a 91 cm (36 inch) pipe weighing 10 tons. A flame arrester (also spelled arrestor), deflagration arrester, [1] or flame trap [2] is a device or form of construction that will allow free passage of a gas or gaseous mixture but will interrupt or prevent the passage of flame.
Reducing, neutral and oxidizing oxyacetylene flames. A flame is affected by the fuel introduced and the oxygen available. A flame with a balanced oxygen-fuel ratio is called a neutral flame. The color of a neutral flame is semi-transparent purple or blue. [1] This flame is optimal for many uses because it does not oxidize or deposit soot onto ...
Any oxygen gas content in the vacuum line or any leak in the vacuum line will result in liquid oxygen mixed with the target vapors, often with explosive results. When performed on a larger scale, this technique is called freeze-drying, and the cold trap is referred to as the condenser.
A gas chamber is an apparatus for killing humans or animals with gas, consisting of a sealed chamber into which a poisonous or asphyxiant gas is introduced. Poisonous agents used include hydrogen cyanide and carbon monoxide .
The term inert gas is context-dependent because several of the inert gases, including nitrogen and carbon dioxide, can be made to react under certain conditions. [1] [2] Purified argon gas is the most commonly used inert gas due to its high natural abundance (78.3% N 2, 1% Ar in air) [3] and low relative cost.
Trap efficiency is typically 5 – 30%, but can be as much as 40%. [4] Positronium (Ps) formation via charge-exchange (e.g., e + + N 2-> N 2 + + Ps) is a major loss process. Molecular nitrogen is used because it is unique in having an electronic energy level below the threshold for Ps formation; hence it is the trapping gas of choice. [5]
Outdoor stocking density is not stated, but it is understood that the outdoor range must be at a minimum 1.5 times the floor area of inside the barn. [32] RSPCA Approved Farming standards for free range require an indoor stocking density of about 17 birds per square metre, and outdoor densities of up to 17 birds per square metre. No beak ...