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  2. Pigging - Wikipedia

    en.wikipedia.org/wiki/Pigging

    Open valve V2 fully. Close and lock valves V1 and V3. Unlock and open vent and drain valves. Allow launcher to depressurise and drain. Close and lock vent and drain valves. Pig launcher is then ready for the next pig to launch. Schematic of a pig receiver. See diagram on the right representing a pig receiver. To receive a pig Unlock and open ...

  3. Pipefitter - Wikipedia

    en.wikipedia.org/wiki/Pipefitter

    Using an always-open or always-closed valve called a tap, pipe layers connect them to a wider system and bury the pipes. whereas, Pipe fitters plan and test piping and tubing layouts; cut, bend or fabricate pipe or tubing segments; and join those segments by threading them, using lead joints, welding, brazing, cementing, or soldering them together.

  4. Clean-in-place - Wikipedia

    en.wikipedia.org/wiki/Clean-in-place

    A clean-in-place unit on display at the World of Coca-Cola in Atlanta. Clean-in-place (CIP) is an automated method of cleaning the interior surfaces of pipes, vessels, equipment, filters and associated fittings, without major disassembly. CIP is commonly used for equipment such as piping, tanks, and fillers.

  5. Hydraulically activated pipeline pigging - Wikipedia

    en.wikipedia.org/wiki/Hydraulically_Activated...

    Hydraulically activated pipeline pigging (HAPP) is a pigging technology applied for pipeline cleaning. The basic principle is that a pressure drop is created over a by-passable pig held back against a pipeline's fluid flow. The pipeline fluid passing through the pig's cleaning head is accelerated by this pressure drop, forming strong cleaning jets.

  6. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    Valves stop (or regulate) the flow of liquids or gases. They are categorized by application, such as isolation, throttling, and non-return. Isolation valves temporarily disconnect part of a piping system to allow maintenance or repair, for example. Isolation valves are typically left in either a fully open or closed position.

  7. Control valve - Wikipedia

    en.wikipedia.org/wiki/Control_valve

    A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. [1] This enables the direct control of flow rate and the consequential control of process quantities such as pressure, temperature, and liquid level.

  8. Isolation valve - Wikipedia

    en.wikipedia.org/wiki/Isolation_valve

    An isolation valve is a valve in a fluid handling system that stops the flow of process media to a given location, usually for maintenance or safety purposes. [1] They can also be used to provide flow logic (selecting one flow path versus another), and to connect external equipment to a system. [2]

  9. Air-operated valve - Wikipedia

    en.wikipedia.org/wiki/Air-operated_valve

    These valves often provide a simple on-off function. 3-way valves can be normally closed, normally open, and offer a universal function where gas can be diverted through a third opening to move the valve into the normally closed or normally open position. [1] [2] 3-way valves pressurize and exhaust one outlet port to control a single-acting ...

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