Ordliste

There are 46 entries in this glossary.
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Term Main definition
FABRICATED VALVE

A valve in which the body is neither cast nor forged but rather is formed from plate or pipe welded together.

FACE-TO-FACE

The overall dimension from the inlet face to the outlet face of the valve (one end to the other). This dimension is governed by ASME B16.10 and for pipeline valves API 6D / ISO 14313 to ensure that such valves are mutually interchangeable regardless of the manufacturer.

FACING

The finishing of the contact surface of flanged fittings.

FAIL ACTION

A term used to describe the desired failure position of a control valve. It could be fail-closed fail-open or fail-in-place. With a spring-return actuator fail-in-place action usually requires the use of a lock-up valve.

FAIL-SAFE VALVE

When there is a failure in the pipeline system the actuated valve is designed to automatically either open or close the valve.

FATIGUE

The phenomenon leading to fracture under repeated or fluctuating stresses having a maximum value less than the tensile strength of the material.

FATIGUE ASSESSMENT

Fatigue resistance verification of a component subjected to a number of design/operating cycles.

FE (Flanged End)

See RF and RTJ.

FEA (Finite Element Analysis)

A numerical method of analyzing complex shapes by organizing the volume into a series of smaller elements which can be more accurately analyzed to determine whether or not components are suitable for their intended purpose.

FEEDBACK

The process of transferring data from the output of a system to the input typically for valve position monitoring.

FEMALE THREAD

An internal screw thread designed to mate with a component having male (external) threads of the same size and type.

FIELD BUS

A digital serial two-way communications system that interconnects measurement and control devices such as sensors actuators and controllers. Additional intelligence can be embedded in field devices which can allow calibration and diagnostics and decentralised control.

FIELD SERVICEABLE

An equipment is field serviceable when normal repair or replacement of operating parts can be accomplished in the field without returning to the manufacturer.

FILTER

A device incorporated into a system to remove contaminants from the fluid.

FIRE POINT

The temperature at which a fuel will continue to burn after ignition.

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