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.
Submit. Â· just now. Report Abuse. Ultraviolet light (UV) from the sun and oxygen molecules (O2) are responsible for most of ozone (O3) production. Ozone is formed by photochemical reactions occurring in the stratosphere. These reactions primarily occur high in the atmosphere because the UV light that drives them is completely absorbed in the stratosphere. We call this type of UV light UV-C. The UV-C light carries enough energy to break apart the oxygen molecule.