A Valve is a fitting device that regulates, directs or controls the flow of a fluid (gas, liquid, fluidised solid, or slurry) by opening, closing, or partially obstructing various directions. The Valve types are: ball, butterfly, check, diaphragm, flap, gate, globe, plug, pinch, shut off, and pressure relief (PSV), control valves etc., and it consists of body, bonnet, trim (internal elements), actuator, and packing.
Related Definitions in the Project: The Piping and Pipeline Engineering
Example Article of the Valve:
The effects of highly corrosive fluids on valves and disasters that can be avoided (by Welsford, G., ValveMan: HP July 2022)
Some of the highly corrosive fluids in the oil and gas industry contain the following compounds: carbon dioxide (CO2), hydrogen sulfide (H2S), chlorides and moisture. These corrosive fluids have different chemical interaction mechanisms with the valve’s body and demonstrate distinct behavioral tendencies when in contact with specific metallic materials. In crude oil, the concentration of H2S is between 0.05% and 15%. Sulfide concentrations above 0.15% are sufficient to cause sulfidation corrosion in plain steels and low-alloy steels. (more about …)
