OSV Chemical Code, 2018 Edition: English (eBook) IA289E

Published Date

September 2018

OSV Chemical Code, 2018 Edition: English (eBook) IA289E

(Excludes any applicable taxes)

The present Code has been developed for the design, construction and operation of offshore support vessels (OSVs) which transport hazardous and noxious liquid substances in bulk for the servicing and resupplying of offshore platforms, mobile offshore drilling units and other offshore installations, including those employed in the search for and recovery of hydrocarbons from the seabed.

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The basic philosophy of the present Code is to apply standards contained in the Code and the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code) and in the International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code) to the extent that is practicable and reasonable taking into account the unique design features and service characteristics of OSVs.



Resolution A.1122(30)

Chapter 1 – General

1.1 Application

1.2 Definitions

1.3 Equivalents

1.4 Surveys and certification

Chapter 2 – Vessel survival capability and location of cargo tanks

2.1 General

2.2 Freeboard and stability 2.3 N on-cargo discharges below the freeboard deck

2.4 Conditions of loading

2.5 Flooding assumptions

2.6 Damage assumptions

2.7 Standard of damage

2.8 Survival requirements

2.9 Location of cargo tanks

Chapter 3 – Vessel design

3.1 Cargo segregation

3.2 A ccommodation, service and machinery spaces and control stations

3.3 A ccess to spaces in the cargo area

Chapter 4 – Special requirements for products with a flashpoint

not exceeding 60°C, toxic products and acids

4.1 G eneral requirements for products with a flashpoint not exceeding 60°C,

toxic products and acids

4.2 Products with a flashpoint not exceeding 60°C

4.3 T oxic products

4.4 Acids

Chapter 5 – Cargo containment

5.1 Definitions

5.2 T ank type requirements for individual products

Chapter 6 – Cargo transfer

6.1 Piping scantlings

6.2 Piping fabrication and joining details

6.3 Flange connections

6.4 T est requirements for piping

6.5 Piping arrangements

6.6 Cargo-transfer control systems

Chapter 7 – Cargo tank venting

7.1 General

7.2 T ypes of tank venting systems

7.3 Venting requirements for individual products

7.4 Cargo tank gas freeing

Chapter 8 – Electrical installations

8.1 G eneral requirements

8.2 E lectrical requirements for individual products

Chapter 9 – Fire-fighting requirements

9.1 Application

9.2 Cargo pump-rooms

9.3 Protection of the cargo area

9.4 Special requirements

9.5 I nert gas production on board

Chapter 10 – Mechanical ventilation in the cargo area

10.1 Definitions

10.2 G eneral requirements

10.3 Spaces not normally entered

Chapter 11 – Instrumentation and automation systems

11.1 General

11.2 Level indicators for cargo tanks

11.3 O verflow control

11.4 Vapour detection

Chapter 12 – Pollution prevention requirements

Chapter 13 – Life-saving appliances and arrangements

Chapter 14 – Personnel protection

14.1 Protective equipment

14.2 First-aid equipment

14.3 Safety equipment

14.4 E mergency equipment

Chapter 15 – Operational requirements

15.1 General.

15.2 Cargo information .

15.3 Personnel training.

15.4 Opening of and entry into cargo tanks.

15.5 Simultaneous carriage of deck cargo and products.

Chapter 16 – Backloading of contaminated bulk liquids

16.1 Preamble.

16.2 General.

16.3 Documentation.

16.4 Operation.

Chapter 17 – Discharging and loading of portable tanks on board

17.1 Preamble.

17.2 General.

17.3 Independent tanks.

17.4 Shipment of cargo in portable tanks used as deck tanks .

Chapter 18 – Carriage of liquefied gases

18.1 General requirements .

18.2 Accommodation, service and machinery spaces and control stations .

18.3 Cargo containment.

18.4 Materials of construction.

18.5 Vent system for cargo containment.

18.6 Cargo transfer.

18.7 Vapour detection.

18.8 Gauging and level detection.

18.9 Emergency shutdown system.

18.10 Personnel protection.

18.11 Carriage on open deck .

18.12 Carriage of other liquefied gases listed in chapter 19 of the IGC Code.


Appendix 1 Model form of Certificate of Fitness.

Appendix 2 Guidelines for testing prior to backloading.

Appendix 3 Model format for the procedure for discharging and loading portable tanks

containing dangerous goods carried as deck tanks on offshore support vessels.

A​​s a specialized agency of the United Nations, IMO is the global standard-setting authority for the safety, security and environmental performance of international shipping. Its main role is to create a regulatory framework for the shipping industry that is fair and effective, universally adopted and universally implemented.  

In other words, its role is to create a level playing-field so that ship operators cannot address their financial issues by simply cutting corners and compromising on safety, security and environmental performance. This approach also encourages innovation and efficiency.

Shipping is a truly international industry, and it can only operate effectively if the regulations and standards are themselves agreed, adopted and implemented on an international basis. And IMO is the forum at which this process takes place.

Title: OSV Chemical Code, 2018 Edition: English (eBook) IA289E
Product Code: MM1457EA
ISBN: ISBN 13: 9789280116977, ISBN 10: 9280116975
Published Date: September 2018

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