Section 2 Prevention of Fire and Explosion

201. Location and separation of spaces

1. General

(1) Machinery and equipment are to be arranged in accordance with API RP 14J.

(2) Equipment items that could become fuel sources in the event of a fire are to be separated from potential ignition sources by space separation, firewalls or protective walls. The following may be referred for fuel sources and ignition sources.

(3) For the overall safety of personnel and unit, the followings are to be considered in design:

(A) Separation of non-hazardous areas from those classified as hazardous areas

(B) Minimizing the likelihood of uncontrollable releases of hydrocarbon to the environment

(C) Minimizing the spread of flammable liquids and gases which may result in a hazardous event and facilitating rapid removal of any accumulations

(D) Minimizing the probability of ignition

(E) Minimizing the consequences of fire and explosions

(F) Preventing fire escalation and equipment damage

(G) Providing for adequate arrangements for escape and evacuation

(H) Effective emergency response

(I) Protection of safety systems, critical systems from damage

(J) Equipment arrangements are to provide access for inspection and servicing and safe means

of egress

(4) In case of a occupants to conflagration.

from all machinery spaces.

fire onboard the unit, the means of escape is to permit the safe evacuation of all a safe area, even when the structure they occupy can be considered lost in a

2. Accommodation spaces are to be located in non-hazardous area and not to be located above or be- low the liquefied gas storage tank, condensate storage tank and process areas.

3. Control stations are to be located in non-hazardous areas.

4. Process systems are to be as follows.

(1) The raw gas inlet and vaporized gas outlet device including swivel are to be separated from sources of ignition and protected from mechanical damage.

(2) "A-0" firewalls around the raw gas inlet area are to be used to provide protection from poten- tial uncontrolled flow from wellheads with shut-in pressures exceeding 42 kg/cm2.

(3) Flare and vent systems are to be in accordance with the API Std. 521 deemed appropriate by

the Society. The radiant heat intensities or emissions from flares and vents are not to exceed the following limits:

(A) In areas where emergency action lasting up to 1 minute may be required by personnel without shielding, but with appropriate clothing: 6.3 kW m

(B) In areas where emergency action lasting several minutes may be required by personnel with-

out shielding, but with appropriate closing: 4.7 kW m

(C) At any location where personnel are continuously exposed: 1.6 kW m

(D) Temperature rating of electrical and mechanical equipment

(E) At any point on the unit where the gas plumes from vents could be ignited or personnel could come into contact with such gas: 60% LEL

(4) Fired vessels(glycol reboilers, etc.) are to be installed away from wellheads and other hydro- carbon processing and storage equipment. If it is not be possible to comply to the above re- quirement, particularly when the space of the process area is limited, causing fired vessels to be located in the unfired process areas, then the fired vessel is to be surrounded on all sides by a minimum of "A-0" class firewall.

5. Stations for activation of the emergency shutdown system for complete platform shutdown are to be located as follows:

(1) Helicopter decks

(2) Exit stairway landings at each deck level

(3) Boat landings

(4) Emergency evacuation stations

(5) Near the main exits of living quarters

(6) Emergency control station

(7) Process control station