I am working on FLNG project, i will be very thankful if anybody who has knowledge on FLNG / FPSO projects at EPC or at Valve manufacturer,  tell me if any special valves are available in market  for space saving.

Conventional Double Block & Bleed arrangement takes lot of space. Is their any valves available for positive isolation to replace this arrangement. Application will be CRYOGENIC (-196 deg.cel.)

Depending on the size involved, there are double-ball (in a single body) valves available.  Additionally, you can use compact valves with hub ends, which save both length and weight, and pipe them up in a traditional valve-drain-valve configuration.

If you are looking to replace the traditional DBB piping arrangement, I'd look at the double-ball valve.

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