Hoover offers Offshore Cryogenic Tanks for the safe handling, transportation and storage of liquid nitrogen, primarily for wells, pipeline, and processing equipment operations. These cryogenic bulk tanks are designed and manufactured to meet DNV, EU Directive 1999/36/EC and EN 13530 standards. Frames meet DNV 27-1 standards.
Our offshore cryogenic tanks are designed for use on offshore platforms and rigs and are configured to fit in the confined spaces found on oil rigs. They are constructed to safely store high pressure liquid nitrogen and withstand the harsh offshore environment. Stainless steel is used for the inner vessel, piping, valves, instruments and welds, providing strength, superior corrosion resistance and easy clean-up between loads. The external shell is constructed of carbon steel treated to provide corrosion resistance. The storage frames are designed for safe and secure stacking during transport and are available in bolt-down options. Safety features include dual relief valves in the inner tank and safety discs on the outer tank.
Fittings and Accessories
Valve Type: Herose & Rego valves offered on standard tanks.
Piping Option: Incorporates a direct rear fill to allow for concurrent fill/liquid decant
Frame & Tanks Design
The frame and tank is design to carry LIN and LAR. As Liquid Argon has a greater specific gravity than Liquid Nitrogen, the fame and tank supports are design to carry an increase payload of approximately 4,200Kg.
The oil and gas industry uses LIN only in this type of vessel which has a M.G.W. of approx. 11,500Kg. The “LIN Only” tank and frame are designed to meet the higher payloads.
As the tank is design to have a greater M.G.W. by 4,200Kg than the other competitors tanks, this should serve the customer to have a more robust and longer life which would add to their R.O.I.
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Technical Specification for 6 Bar 10’ ISO Offshore Cryogenic Tank
|Tank Type:|| IMDG T75, DNV 2.7-1, EN12079, 10’ ISO Cryogenic Tank in Rectangular Frame
|Frame Dimensions:||2991 x 2438 x 2591mm high (10’x 8’ x 8’6” high ISO)|
|Capacity:||7,890L gross +/-2%|
|Cargo:||Liquid Nitrogen (LIN)|
|M.G.W.:||11,432 kg (LAR)|
|Max Payload:||6,132 kg (LAR)|
|Test Pressure:|| 9.46 Bar
|Design Temp:||-196°C to +50°C|
|Holding Time:||25 days|
|Evaporation rate:||0.4 % per day|
|Inner Shell Material:||304 Stainless Steel|
|Outer Shell Material:||355 Carbon Steel|
|Corner Castings:||4 top and 4 bottom|
|Insulation:||Super insulation with high vacuum|
|Piping:|| Minimum SCH 10 316 SS
EN 10219 S355 J2H on primary structure,
EN 10028 S355 J2G3 on Padeyes
EN 10219 S275 J2H on secondary structure
ISO bottom type Corner castings on top & bottom corners(x8)
Bolt Down Cradle
This picture shows the bolt down cradles onto the frame. These cradles have been design in big box feet to reduce any loads/stresses that may be transferred into the tanks during transportation.
The addition of the bolt down cradles makes it easier for the customer/operator to maintain or service there tank and frame over time.
The cradle/doublers has been designed to meet the higher payload (LAR) of 15,644Kg and has been rail impacted tested at this M.G.W.