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Considered Designing Factors When Floating Flexible Natural Gas Hoses Used in FSRU Devises.


       FSRU is the abbreviation of Floating Storage and Re-gasification Unit, also commonly known as LNG-FSRU. It integrates multiple functions such as LNG (liquefied natural gas) reception, storage, transshipment, and regasification export. It is an integrated special equipment equipped with a propulsion system and has the function of an LNG carrier.

The main function of FSRU is the storage and regasification of LNG. After pressurizing and gasifying the LNG received from other LNG ships, the natural gas is transported to the pipeline network and provided to the users.

The device can be used as a substitute for traditional land LNG receiving stations or as ordinary LNG ships. Currently, it is mainly used as LNG receiving and gasification devices, LNG transportation and gasification ships, platform-type LNG receiving terminals and gravity infrastructure offshore receiving devices.

 

1. Manifold location and hose selection

Manifold Location: Ship Deck/Shipside

Hose selection: Different stiffnesses should be considered to transfer strength from the floating pipe to the manifold.

Boat Deck: Tanker rail hose

Ship side: hoisting, one end reinforced hose.

 

2. The Length of Tanker Rail Hose

 The horizontal distance of the manifold flange and the freeboard height of the FSRU at light load determine the pipeline length designed . Stress concentration must be avoided in the joint part to ensure a gentle transition from rigidity to flexibility.

 

3. The Length of one end reinforced mairne hose

 The perpendicular distance from the manifold flange to the water surface when the FSRU is under light load must avoid stress concentration on the joint.

 

4. The entire length of the pipeline

 1)The perpendicular distance from the manifold flange to the water surface when the FSRU is under light load,

2)the horizontal distance from the first hose close to the water surface to the shore connecting pipe,

3) the perpendicular distance from the reinforced hose at one end of the shore platform to the water surface.

 

5. Wind, wave and current loads

 Wind, wave, and current loads determine the design of hoses for torsional, tensile, and bending loads.

 

6. Flow and velocity

Calculating the appropriate hose inner diameter based on flow or velocity data.

 

7.Conveying medium and temperature

 

8. General parameters of marine hoses

 Inner diameter; length; working pressure; single or double carcass; hose type; minimum residual buoyancy; electrical conductivity; flange grade; flange material.

    

Through rigorous design and manufacturing, Zebung Technology ensures that Floating natural gas hose can work safely and effectively when applied to FSRU devices. At present, the marine floating oil/gas pipelines produced by Zebung have been put into practical use in many countries such as Brazil, Venezuela, Tanzania, East Timor, and Indonesia, and the oil and gas transportation effect has been actually verified. In the future, Zebung Technology will aim at the most cutting-edge scientific and technological fields, continue to develop high-end new products, enhance independent core competitiveness, and promote high-quality development of enterprises.


Post time: Dec-23-2023
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