The taper rate for all NPT threads is 1â16 (3â4 inch per foot) measured by the change of diameter (of the pipe thread) over distance. The angle between the taper and the center axis of the pipe is 1Â° 47'â² 24â³ (1.7899Â°). Commonly-used sizes are 1/â8, 1/â4, 3/â8, 1â/2, 3â/4, 1, 1 1â/4, 1 1â/2, and 2 inch, appearing on pipes and fittings by most U.S. suppliers.
Ozone is a molecule made up of three oxygen atoms, often referenced as O3. Ozone is formed when heat and sunlight cause chemical reactions between oxides of nitrogen (NOX) and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. This reaction can occur both near the ground and high in the atmosphere.
  A: Ozone is an allotrope of oxygen, with three oxygen atoms in a molecule. It is a very powerful oxidizer, and absorbs UV-B and some infrared light. Ozone is unstable and decays on its own, the decay rate being a function of temperature and time. Other compounds can accelerate ozone's decay.Ozone is formed in the troposphere (where we are) by combustion and industrial processes, and by light activating combustion products. This ozone is a component of smog. Ozone is formed in the ozone layer when oxygen molecules are shattered by absorbing UV-C from the Sun.UV-C only penetrates to about the lower stratosphere (above where aircraft fly), and this is where the ozone layer is found. A: Ozone is an allotrope of oxygen, with three oxygen atoms in a molecule. It is a very powerful oxidizer, and absorbs UV-B and some infrared light. Ozone is unstable and decays on its own, the decay rate being a function of temperature and time. Other compounds can accelerate ozone's decay.