Section 3 Regasification System Equipment

301. General

This Section provides requirements for regasification equipment that are typically utilized in the unit.

302. Definition

1. Suction Drum is to supply LNG stable to HP LNG Pump of liquefied natural gas regasification and gas recovery that occurs during evaporation to return back to the cargo tank acts.

2. In-tank Pump/LP Pump is to supply LNG from cargo tank to suction drum.

3. Booster Pump/ HP Pump is to pressurize over 1450 psi LNG from suction drum and transfer to vaporizer.

4. LNG Vaporizer is to vaporize LNG supplied from HP LNG pump to NG.

(1) Open Rack Vaporizer is the method that provide heat loads to LNG inside plate exchanger equivalent to heat tranfer from seawater outside plate exchanger.

(2) Submerged Combustion Vaporizer is the method that is heated by high temperature combus- tion gas generated from burning fuel gas and air inside of burner submerged in water while the heat exchanger is immersed in water.

5. Heating system for LNG Vaporizer is consist of the intermittent medium of glycol and propane gas based on normally seawater or steam.

6. Boil-off Gas Handling System is consist of gas compressors and gas condensers, and vaporized gas is normally recycled to structures or used as a fuel gas or condensated in gas condenser or ex- ported through gas compressor or burned by flare system.

7. Nitrogen System is required for purging or maintenance of steam generated from equipment and pipes.

303.

Heating system for vaporizer

1. Closed Loop System is that heat and reuse the part of seawater by seawater heater as recirculate seawater from vaporizer outlet without suction of new seawater when the seawater temperature is

7.2 ℃ and below.

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~ 14.7 ℃.

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Open Loop System is that heaters of direct combustion method is used, and generally used in suit-

3. able temperature of seawater is available and the site permitted disposal of cold seawater.

Heating systems should require the device that detecting leakages of high pressure LNG or NG be

4. able to flow to heating medium, and prevent from the over pressure and the damage of vaporizer

by freezing of heating medium.

304. Heat exchangers

1. Tubular heat exchangers are to comply with applicable sections of ASME Boiler and Pressure Vessel Code Section VIII, Division 1 or Division 2, TEMA Standards or API Std. 660.

2. Plate and frame exchangers may be employed for handling flammable liquid, with the following re- strictions:

(1) Safety or protective devices are to be provided as required in accordance with of API RP 14C, Appendix A, A10.

(2) Each exchanger is to be provided with an exchanger enclosure, protective wall, shield or similar

barrier, capable of containing spray in case of gasket leakage during operation.

(3) Each exchanger is to be provided with spill containment and drain capable of handling a liquid release of at least 10% of the maximum flammable stream flowrates.

3. Air-cooled heat exchangers are to comply with API Std. 661.