Miscellaneous Piping

Absolute Pipe Roughness

'Absolute Pipe Roughness' (ε) is a measure of pipe wall irregularities of commercial pipes. Other than pipes, absolute roughness is also used for representing...

Instrumentation Piping Valves

Globe Valves

Globe valves have proved to be very popular recently since the globe valve design allows very fine regulation characteristics. They are very popular to be used...

Instrumentation Piping Valves

Butterfly Valves

Butterfly valves have been in use since the invention of steam engines. The initial butterfly valves were available in large sizes (6" and above) and were used...

Instrumentation Piping Valves

Ball valves

The concept of a ball valve dates back to ancient times. However modern ball valves have been developed during the early 20th century. Ball valves are among...

Instrumentation Piping Valves

Plug Valves

Plug valves are also known as 'cock valves'. A plug valve is one the simplest and earliest valve design. A plug valve consists of a plug which is generally...

Instrumentation Miscellaneous Piping

Valve trim

The operating parts of a valve which are normally exposed to the process fluid are referred to as 'valve trim'. Usually these parts are subject to wear and...


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