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2. Isobutane - Wikipedia

   en.wikipedia.org/wiki/Isobutane

   R600-Isobutane 13.6Kg Cylinder by Starke Hvac. Isobutane, also known as i-butane, 2-methylpropane or methylpropane, is a chemical compound with molecular formula HC(CH 3) 3. It is an isomer of butane. Isobutane is a colorless, odorless gas. It is the simplest alkane with a tertiary carbon atom.

3. Diving cylinder - Wikipedia

   en.wikipedia.org/wiki/Diving_cylinder

   For example, in the US and in many diving resorts in other countries, one might find aluminum cylinders of US manufacture with an internal capacity of 0.39 cubic feet (11 L) filled to a working pressure of 3,000 psi (210 bar); Taking atmospheric pressure as 14.7 psi, this gives 0.39 × 3000 / 14.7 = 80 ft 3 These cylinders are described as "80 ...

4. Reid vapor pressure - Wikipedia

   en.wikipedia.org/wiki/Reid_vapor_pressure

   Reid vapor pressure (RVP) is a common measure of the volatility of gasoline and other petroleum products. [1] It is defined as the absolute vapor pressure exerted by the vapor of the liquid and any dissolved gases/moisture at 37.8 °C (100 °F) as determined by the test method ASTM-D-323, which was first developed in 1930 [2] and has been revised several times (the latest version is ASTM D323 ...