Using Snap Cutters. 1  1. Use chalk to mark cut lines on the pipe. 2  2. Wrap the chain of the snap cutter around the pipe as evenly as possible. 3  3. Apply pressure onto the handles of the cutter so the wheels cut into the pipe.  4. Repeat these steps at all other chalk lines.
Reid vapor pressure (RVP) is a common measure of the volatility of gasoline. It is defined as the absolute vapor pressure exerted by a liquid at 100 Â°F (37.8 Â°C) as determined by the test method ASTM-D-323. The test method applies to volatile crude oil and volatile nonviscous petroleum liquids, except liquefied petroleum gases.
The term vapor pressure usually refers to equilibrium vapor pressure, or the pressure at which the rate that particles leave the substance to form vapor equals the rate that particles reenter the substance from the vapor. Vapor pressure depends only on the temperature and the type of substance. Scientists can measure the temperature and vapor pressure of an unknown substance to help determine what it contains. Scientists usually measure vapor pressure in units of atmospheres (atm), millimeters of mercury (mm Hg), or torr.