The cryogenic valve is a specialized component engineered for optimal performance in systems using ethylene, liquefied natural gas, and other chemical apparatuses. It is categorized primarily into two types: the cryogenic floating ball valve and the cryogenic standing ball valve, each designed for specific industrial applications. The long-necked structure is generally not utilized for environments where the temperature exceeds -50ºC, whereas it finds its application in conditions where the temperature is below -50ºC. This design consideration is focused on safeguarding the stuffing box by positioning it at a distance from extremely cold areas. To ensure the effective sealing of the stuffing, cold insulation materials can be applied to mitigate the loss of cold energy. This valve type is specifically tailored for ethylene, liquefied natural gas, and other chemical processes. Design and Manufacture Standards
BS6364 - Valves tailored for Cryogenic Service, ensuring reliability in extreme conditions.
ASME B16.5 - Specifications for Pipe Flanged and Flanged Fittings, ensuring robust connections.
ASME B16.25 - Standards for Butt Welding Ends, facilitating strong and durable joint formations.
ASME B16.10 - Specifications for Face-To-Face and End-To-End Dimensions of Valves, along with ASME B16.34 for Valves with Flanged, Threaded, and Welding Ends, providing precision and uniformity in valve dimensions.
SHELL SPE 77/200 - Valves suitable for Low Temperature & Cryogenic Services, guaranteeing operational efficiency in cold environments.
Inspection and Test Standards
API598 - Comprehensive Valve Inspection and Testing, ensuring product quality and performance.
BS6364 - Valves certified for Cryogenic Service, confirming their reliability under low temperatures.
SHELL SPE 77/312 - Standards for Fugitive Emission Production Testing, ensuring environmental compliance.
ISO 15848 - Guidelines for Industrial Valves concerning the Measurement, Test, and Qualification Procedures for Fugitive Emissions, promoting sustainable and emission-controlled operations.
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