Section 1 Summary of Minimum Requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 11 Production, Storage and Offloading of Liquefied Gases in Bulk - Chapter 19 Summary of Minimum Requirements - Section 1 Summary of Minimum Requirements

Section 1 Summary of Minimum Requirements

Parent topic: Chapter 19 Summary of Minimum Requirements

1.1 Explanatory notes to the summary of minimum requirements

Table 19.1.1 Explanatory notes to the summary of minimum requirements

Product name

(column a)

  

UN Number

(column b)

  

Ship type

(column c)

 Ship unit type 2G, see Pt 11, Ch 2 Ship Survival Capability and Location of Cargo Tanks

Independent tank type C required

(column d)

 – not required under the IGC Code

Tank environmental control

(column e)

 – no special requirements under the IGC Code

Vapour detection

(column f)

F: Flammable vapour detection

A: Asphixiant

Gauging

(column g)

R: Indirect, closed or restricted, see Pt 11, Ch 13 Instrumentation and Automation Systems

C: indirect or closed, see Pt 11, Ch 13 Instrumentation and Automation Systems

MFAG Table no.

(column h)

MFAG numbers are provided for information on the emergency procedures to be applied in the event of an accident involving the products covered by the IGC Code

Where any of the products listed are carried at low temperature from which frostbite may occur, MFAG no. 620 is also applicable

Special requirements

(column i)

 When specific reference is made to Pt 11, Ch 17 Special Requirements, these requirements shall be additional to the requirements in any other column

Table 19.1.2 Explanatory notes to the summary of minimum requirements

a b c d e f g h I
Product name UN number Ship unit type Independent tank type C required Control of vapour space within cargo tanks Vapour detection Gauging MFAG Table no. Special requirements
Butane 1011 2G — — F R 310 —
Butane-propane mixture 1011/1978 2G — — F R 310 —
Carbon dioxide (High Purity) —

2G

see Note 1

— — A R — Pt 11, Ch 17, 1.4 Carbon dioxide – High purity
Carbon dioxide (Reclaimed Quality) —

2G

see Note 1

— — A R — Pt 11, Ch 17, 1.5 Carbon dioxide – Reclaimed quality
Ethane 1961 2G — — F R 310 —
Methane (LNG) 1972 2G — — F C 620 —
Nitrogen 2040

2G

see Note 1

— — A C — Pt 11, Ch 17, 1.6 Nitrogen

Pentane (all isomers)

see Note 2

1265 2G — — F R 310 Pt 11, Ch 17, 1.2 Flame screens on vent outlets, Pt 11, Ch 17, 1.3 Cargo pumps and discharge arrangements 1.3.1
Propane 1978 2G — — F R 310 —

LR NOTES

1. Ship units designed to store LNG or LPG with additional tanks to store carbon dioxide are to comply with the requirements for ship unit type 2G.

2. This cargo is also covered by the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code).

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