Section 2 Design of Regasification Systems

201. General

1. Regasification systems are to be arranged so that one single maloperation or malfunction will not lead to critical situations for personnel or the unit.

2. The requirements not specified in this Guidance are to be in accordance with Pt 7, Ch 5, Sec 5. of Rules for the Classification of Steel Ships.

202. Heating system for vaporizer of regasification system

1. Heating device of the vaporizer may be composed of the following systems.

(1) Closed Loop System is that heat and reuse the part of seawater by seawater heater as re- circulate seawater from vaporizer outlet without suction of new seawater when the seawater tem-

perature is 7.2 ℃ and below.

(2) Cleossmbthinaend 1L4.o7op℃SybsytehmeaitsingthasteavwaaptoerrizuesiLnNg Gseamtearinthaeiantienrg wthheentetmhepesraetauwreateorf tveamppoerrizaeturreinliest 7n.2ot

℃ to 14.7 ℃.

(3) Open Loop System is that heaters of direct combustion method is used, and generally used in suitable temperature of seawater is available and the site permitted disposal of cold seawater.

2. Heating medium should not exceed 220 ℃.

3. Heating systems are to require the device that detecting leakages of high pressure LNG or NG be able to flow to heating medium, and prevent from the over pressure.

4. Means for protecting the vaporizer from freezing of the heating medium is to be provided.

203. Process shutdown system

1. Process shutdown system should be provided for the regasification system. Process shutdown system is to be operated manually and remotely in accordance with 210. Table 12.1

2. In operation of process shutdown system, the booster pump should be stopped shutoff valves installed on the relevant regasification equipment.

and be closed the

204. Emergency shutdown system

1. The ESD system for regasification systems is to be in accordance with

Pt 7,

Ch 5, 506. 4. of

Rules for classification of Steel Ships.

2. Activation of the ESD is to stop in-tank transfer pumps and close gas export valves.

3. The ESD system is to be activated by manual call points and by fusible elements and fire de- tectors located in way of the regasification units in addition as addressed in Pt 7, Ch 5, 506. of Rules for Classification of Steel Ships.

205. Depressurization system and blow down system

1. The depressurization system is to ensure safe collection and disposal of hydrocarbon during the nor- mal operation and during emergency condition.

2. The depressurization system is to be simple as possible and be designed in accordance with the fail safe principle.