Gate Valves for piggable service
Gate Valves for piggable service
Yeah, valves can be listed amongst biggest obstacles of piggability, if not properly designed. Full bore valves, without any protrusion inside the line, should be the way to go.
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Gate Valves for piggable service
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RE: Gate Valves for piggable service
RE: Gate Valves for piggable service
As there is a number of pig types and design your customer should advice you on details: type of pig, pressure used, fluid used, temperature and how often.
A qualifiedvalve producer will then be able to give you a detailed answer, and eventual limitation on use.
For some types of gatevalves, for certain pressure classes and sizes, there might be limitations, and it might be necessary to go one dimension higher than nominal for the pipeline. (This is not a given general rule, especially if the valve else is 'pure' full bore without protrusions).
Trim details and geometry is an issue both for piggabillity (not to damage valve or stop pig) and not to tear pig outer surface apart.
The clue is that the valve producer (if the valve producer shall give a warranty for the use) is the one to answer your question, while the customer should be able to give you an answer on a typical sample valve brand and construction which trough practical experience qualifies.
The last answer should give you an idea at what you are up against.
RE: Gate Valves for piggable service
RE: Gate Valves for piggable service
Get one with a *signed* certification that it will allow a smart-pig to pass through it.
RE: Gate Valves for piggable service
For a piggable gate valve, you should specify full-bore, through conduit, such as are found in API 6D.
RE: Gate Valves for piggable service