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Energy
Anything related to the production or supply of energy in any form.
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Energy > Natural gas 
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Energy; Natural gas
A system used to categorize valves according to their pressure-retaining capabilities.
wafer check valve
Energy; Natural gas
A check valve design featuring two spring-loaded flow control elements and a wafer-style body.
wall thickness
Energy; Natural gas
The thickness of the wall of the pressure vessel or valve. For steel valves, minimum thickness requirements are defined in ASME B16.34, API 600, and API 602.
water hammer
Energy; Natural gas
A phenomenon that occurs when the velocity of a fluid in a pipeline is abruptly decreased (such as when a valve is repidly closed). At the point of fluid velocity decrease there ...
water-oil-gas (WOG)
Energy; Natural gas
A rating designation generally used for small valves chiefly in low ratings. Indicates maximum working pressure at ambient + 32° F to +100° F. Also called Nonshock Rating.
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