Iranian Classification Society Rules

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Section 2 Level of Preparing Generic


201. General


1. This Section prescribes plans and documents to be submitted for LNG Ready D. The detail require- ments for designs are to be in accordance with applicable requirements in Guidance for Gas- fu- elled Ships.


2. The plans and documents required in this Section is to be marked "LNG Ready" to separate them from the normal plans and documents of new building.


202. Plans and documents to be submitted


1. The following plans and documents are to be submitted to the Society for review

(1) Arrangement plans showing location of:

(A) Machinery spaces, accommodation, service and control station spaces

(B) LNG fuel tanks and gas containment systems

(C) Gas pump room and compressor rooms

(D) Gas piping with shore connections

(E) Tank hatches, ventilation pipes and any other openings to the LNG fuel tanks

(F) Ventilating pipes, doors and openings to gas pump rooms, compressor rooms and other haz-

ardous areas

(G) Entrances, air inlets and openings to accommodation, service and control station spaces

(H) Hazardous areas of zone 0, 1 and 2

(2) Following plans and data of the LNG fuel containment system:

(A) LNG fuel tank type, dimension and volume

(B) Drawings of support and staying of LNG fuel tanks

(C) LNG fuel tank arrangement including tank room

(D) Specification of design loads and structural analysis for the LNG fuel tank supporting struc- ture

(E) Drawing and specification of LNG fuel tank thermal insulation with heat transfer calculation

(3) Following plans and data of gas fuel supply systems:

(A) Arrangement of engine room, gas pump, gas compressor room and other spaces containing gas equipment

(B) Gas fuel supply piping diagram

(C) Ventilation system arrangement of engine room, gas pump, gas compressor room and other spaces containing gas equipment

(4) Following plans and data of gas fuel bunkering systems:

(A) Arrangement of gas fuel bunkering systems

Ch 2 Requirements for Levels of LNG Fuel Ready Ch 2

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(C) Ventilation system arrangement of gas fuel bunkering station

(5) Following plans and particulars for the safety relief valves:

(A) Arrangement for LNG fuel tank relief valves and associated ventilation piping

(B) Calculation of required LNG fuel tank relief valve capacity

(6) Following plans and data for equipment and systems regarding fire protection:

(A) Arrangement of construction for fire protection in relation to LNG fuel tank and other spaces containing gas equipment

(B) Arrangement and specification of water spray system

(C) Arrangement and specification of dry chemical powder installation

(7) Data for a risk analysis according to Ch.3 101. 1 of Guidance for Gas-fuelled Ships

(8) Stability calculations with LNG fuel tanks included