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European norm specification concerning non-refillable metallic cartridges for liquefied petroleum gases. The EN 417 norm specifies container construction, but does however not specify any connectors. IS-8737 [11] Indian standard for LPG connectors for use with cylinders of more than 5 liter water capacity. [12] KHK S0126
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A pair of demand valves fitted to a scuba regulator Navy surface supplied diver with back mount bailout cylinder Solo scuba diver with sling mount bailout cylinder. In underwater diving, an alternative air source, or more generally alternative breathing gas source, is a secondary supply of air or other breathing gas for use by the diver in an emergency.
The enthalpy of combustion of propane gas where products do not return to standard state, for example where the hot gases including water vapor exit a chimney, (known as lower heating value) is −2043.455 kJ/mol. [29] The lower heat value is the amount of heat available from burning the substance where the combustion products are vented to the ...
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[13] [14] The reclaim gas hose which carries the exhaled gas back to the surface for recycling must not be at too great a pressure difference from the ambient pressure at the diver. An additional back-pressure regulator in this line allows finer setting of the reclaim valve for lower work of breathing at variable depths. [15]
On September 13, 2018, excessive pressure in natural gas lines owned by Columbia Gas of Massachusetts caused a series of explosions and fires to occur in as many as 40 homes, with over 80 individual fires, in the towns of Lawrence, Andover, and North Andover, all within the Merrimack Valley, in Massachusetts, United States. One person, 18-year ...