Secondary barrier construction for low temperature liquefied gas storage tank carrying vessels
A new LNG-cargo-tank secondary barrier developed by Japan's Hitachi Shipbuilding and Engineering Co., Ltd., offers ease of fabrication, simple construction, improved efficiency of installation, and protection against seawater ingress as well as LNG leakage. The secondary barrier, intended for use below spherical LNG tanks, consists of unit heat-insulating block plates adhesively secured to the bottom plate of the ship's hold, heat-insulating filling members stuffed into the joints between the block plates, and a protective layer formed on the entire surface of the block plates and the filling members. These unit block plates are in the form of heat-insulating members of the required thickness, preformed into a square or trapezoidal shape, particularly in the form of rigid-foam synthetic-resin plates.
- Assignee:
- Hitachi Shipbuilding and Engineering Co., Ltd.
- Patent Number(s):
- US 4128187
- OSTI ID:
- 6023394
- Country of Publication:
- United States
- Language:
- English
Similar Records
Heat insulating device for low temperature liquefied gas storage tank
Tank supporting structure for ships