Resolution MSC.215(82)

PERFORMANCE STANDARD FOR PROTECTIVE COATINGS FOR DEDICATED SEAWATER BALLAST TANKS IN ALL TYPES OF SHIPS AND DOUBLE-SIDE SKIN SPACES OF BULK CARRIERS

(adopted on 8 December 2006)

 

 

THE MARITIME SAFETY COMMITTEE,

 

RECALLING Article 28(b) of the Convention on the International Maritime Organization concerning the functions of the Committee,

 

NOTING the amendments to regulations II-1/3-2 and XII/6 of the International Convention for the Safety of Life at Sea (SOLAS), 1974, as amended (hereinafter referred to as "the Convention") adopted by resolution MSC.216(82), concerning protective coatings of dedicated seawater ballast tanks and double-side skin spaces,

 

NOTING ALSO that the aforementioned regulation II-1/3-2 provides that the protective coatings referred to therein shall comply with the requirements of the Performance standard for protective coatings for dedicated seawater ballast tanks in all types of ships and double-side skin spaces of bulk carriers (hereinafter referred to as "the Performance standard for protective coatings"),

 

RECOGNIZING that the Performance standard for protective coatings referred to above is not intended to inhibit the development of new or novel technologies which provide for alternative systems,

 

HAVING CONSIDERED, at its eighty-second session, the text of the proposed Performance standard for protective coatings,

 

1. ADOPTS the Performance standard for protective coatings for dedicated seawater ballast tanks in all types of ships and double-side skin spaces of bulk carriers, the text of which is set out in the Annex to the present resolution;

 

2. INVITES Contracting Governments to the Convention to note that the Performance standard for protective coatings will take effect on 1 July 2008 upon entry into force of the amendments to regulations II-1/3-2 and XII/6 of the Convention;

 

3. REQUESTS the Secretary-General to transmit certified copies of this resolution and the text of the Performance standard for protective coatings contained in the Annex to all Contracting Governments to the Convention;

 

4. FURTHER REQUESTS the Secretary-General to transmit copies of this resolution and the Annex to all Members of the Organization which are not Contracting Governments to the Convention;

 

5. INVITES Governments to encourage the development of novel technologies aimed at providing for alternative systems and to keep the Organization advised of any positive results.

 

Annex.

PERFORMANCE STANDARD FOR PROTECTIVE COATINGS FOR DEDICATED SEAWATER BALLAST TANKS IN ALL TYPES OF SHIPS AND DOUBLE-SIDE SKIN SPACES OF BULK CARRIERS

 

1. PURPOSE

 

This Standard provides technical requirements for protective coatings in dedicated seawater ballast tanks of all type of ships of not less than 500 gross tonnage and double-side skin spaces arranged in bulk carriers of 150 m in length and upwards¹ for which the building contract is placed, the keels of which are laid or which are delivered on or after the dates referred to in SOLAS regulation II-1/3-2 as adopted by resolution MSC.216(82).

^{__________________________}

¹ This Standard applies only to dedicated seawater ballast tanks in all types of ships and double-side skin spaces in bulk carriers which are constructed of steel.

 

2. DEFINITIONS

 

For the purpose of this Standard, the following definitions apply.

 

2.1 Ballast tanks are those as defined in the Guidelines for the selection, application and maintenance of corrosion prevention systems of dedicated seawater ballast tanks (resolution A.798(19)) and the Guidelines on the enhanced programme of inspections during surveys of bulk carriers and oil tankers (resolution A.744(18), as amended).

 

2.2 Dew point is the temperature at which air is saturated with moisture.

 

2.3 DFT is dry film thickness.

 

2.4 Dust is loose particle matter present on a surface prepared for painting, arising from blast-cleaning or other surface preparation processes, or resulting from the action of the environment.

 

2.5 Edge grinding is the treatment of edge before secondary surface preparation.

 

2.6 "GOOD" condition is the condition with minor spot rusting as defined in resolution A.744(18).

 

2.7 Hard coating is a coating that chemically converts during its curing process or a non-convertible air drying coating which may be used for maintenance purposes. It can be either inorganic or organic.

 

2.8 NDFT is the nominal dry film thickness. A90/10 practice means that 90% of all thickness measurements shall be greater than, or equal to, NDFT and none of the remaining 10% measurements shall be below 0.9 x NDFT.

 

2.9 Primer coat is the first coat of the coating system applied in the shipyard after shop-primer application.

 

2.10 Shop-primer is the prefabrication primer coating applied to steel plates, often in automatic plants (and before the first coat of a coating system).

 

2.11 Stripe coating is painting of edges, welds, hard to reach areas, etc., to ensure good paint adhesion and proper paint thickness in critical areas.

 

2.12 Target useful life is the target value, in years, of the durability for which the coating system is designed.

 

2.13 Technical Data Sheet is paint manufacturers' Product Data Sheet which contains detailed technical instruction and information relevant to the coating and its application.

 

3. GENERAL PRINCIPLES

 

3.1 The ability of the coating system to reach its target useful life depends on the type of coating system, steel preparation, application and coating inspection and maintenance. All these aspects contribute to the good performance of the coating system.

 

3.2 Inspection of surface preparation and coating processes shall be agreed upon between the shipowner, the shipyard and the coating manufacturer and presented to the Administration² for review. The Administration may, if it so requires, participate in the agreement process. Clear evidence of these inspections shall be reported and be included in the Coating Technical File (CTF) (see 3.4).

^{_________________________}

² In accordance with SOLAS regulation 1/6, for the purposes of this Standard, the Administration may entrust a recognized organization acting on its behalf to determine compliance with the provisions of this Standard.

 

3.3 When considering the Standard provided in section 4, the following is to be taken into account:

 

.1 it is essential that specifications, procedures and the various different steps in the coating application process (including, but not limited to, surface preparation) are strictly applied by the shipbuilder in order to prevent premature decay and/or deterioration of the coating system;

 

.2 the coating performance can be improved by adopting measures at the ship design stage such as reducing scallops, using rolled profiles, avoiding complex geometric configurations and ensuring that the structural configuration permits easy access for tools and to facilitate cleaning, drainage and drying of the space to be coated; and

 

.3 the coating performance standard provided in this document is based on experience from manufacturers, shipyards and ship operators; it is not intended to exclude suitable alternative coating systems, providing a performance at least equivalent to that specified in this Standard is demonstrated. Acceptance criteria for alternative systems are provided in section 8.

 

3.4 Coating Technical File

 

3.4.1 Specification of the coating system applied to the dedicated seawater ballast tanks and double-side skin spaces, record of the shipyard's and shipowner's coating work, detailed criteria for coating selection, job specifications, inspection, maintenance and repair³ shall be documented in the Coating Technical File (CTF), and the Coating Technical File shall be reviewed by the Administration.

^{_______________________}

³ Guidelines to be developed by the Organization.

 

3.4.2 New construction stage

 

The Coating Technical File shall contain at least the following items relating to this Standard and shall be delivered by the shipyard at new ship construction stage:

 

.1 copy of Statement of Compliance or Type Approval Certificate;

 

.2 copy of Technical Data Sheet, including:

 

.2.1 product name and identification mark and/or number;

 

.2.2 materials, components and composition of the coating system, colours;

 

.2.3 minimum and maximum dry film thickness;

 

.2.4 application methods, tools and/or machines;

 

.2.5 condition of surface to be coated (de-rusting grade, cleanness, profile, etc.); and

 

.2.6 environmental limitations (temperature and humidity);

 

.3 shipyard work records of coating application, including:

 

.3.1 applied actual space and area (in square metres) of each compartment;

 

.3.2 applied coating system;

 

.3.3 time of coating, thickness, number of layers, etc.;

 

.3.4 ambient condition during coating; and

 

.3.5 method of surface preparation;

 

.4 procedures for inspection and repair of coating system during ship construction;

 

.5 coating log issued by the coating inspector, stating that the coating was applied in accordance with the specifications to the satisfaction of the coating supplier representative and specifying deviations from the specifications (example of daily log and non-conformity report (see annex 2));

 

.6 shipyard's verified inspection report, including:

 

.6.1 completion date of inspection;

 

.6.2 result of inspection;

 

.6.3 remarks (if given); and

 

.6.4 inspector signature; and

 

.7 procedures for in-service maintenance and repair of coating system.

 

3.4.3 In-service maintenance, repair and partial re-coating

 

In-service maintenance, repair and partial re-coating activities shall be recorded in the Coating Technical File in accordance with the relevant section of the Guidelines for coating maintenance and repair⁴.

^{____________________}

⁴ Guidelines to be developed by the Organization.

 

3.4.4 Re-coating

 

If a full re-coating is carried out, the items specified in 3.4.2 shall be recorded in the Coating Technical File.

 

3.4.5 The Coating Technical File shall be kept on board and maintained throughout the life of the ship.

 

3.5 Health and safety

 

The shipyard is responsible for implementation of national regulations to ensure the health and safety of individuals and to minimize the risk of fire and explosion.

 

4. COATING STANDARD

 

4.1 Performance standard

 

This Standard is based on specifications and requirements which intend to provide a target useful coating life of 15 years, which is considered to be the time period, from initial application, over which the coating system is intended to remain in "GOOD" condition. The actual useful life will vary, depending on numerous variables including actual conditions encountered in service.

 

4.2 Standard application

 

Protective coatings for dedicated seawater ballast tanks of all ship types and double-side skin spaces arranged in bulk carriers of 150 m in length and upwards shall at least comply with the requirements in this Standard.

 

4.3 Special application

 

4.3.1 This Standard covers protective coating requirements for the ship's steel structure. It is noted that other independent items are fitted within the tanks to which coatings are applied to provide protection against corrosion.

 

4.3.2 It is recommended that this Standard is applied, to the extent possible, to those portions of permanent means of access provided for inspection not integral to the ship's structure, such as rails, independent platforms, ladders, etc. Other equivalent methods of providing corrosion protection for the non-integral items may also be used, provided they do not impair the performance of the coatings of the surrounding structure. Access arrangements that are integral to the ship structure, such as increased stiffener depths for walkways, stringers, etc., are to fully comply with this Standard.

 

4.3.3 It is also recommended that supports for piping, measuring devices, etc., be coated in accordance with the non-integral items indicated in 4.3.2.

 

4.4 Basic coating requirements

 

4.4.1 The requirements for protective coating systems to be applied at ship construction for dedicated seawater ballast tanks of all ship types and double-side skin spaces arranged in bulk carriers of 150 m in length and upwards meeting the performance standard specified in 4.1 are listed in table 1.

 

4.4.2 Coating manufacturers shall provide a specification of the protective coating system to satisfy the requirements of table 1.

 

4.4.3 The Administration shall verify the Technical Data Sheet and Statement of Compliance or Type Approval Certificate for the protective coating system.

 

4.4.4 The shipyard shall apply the protective coating in accordance with the verified Technical Data Sheet and its own verified application procedures.

 

Table 1.
Basic coating system requirements for dedicated seawater ballast tanks of all type of ships and double-side skin spaces of bulk carriers of 150 m and upwards

 

 

^{_____________________}

⁵ Type of gauge and calibration in accordance with SSPC-PA2:2004. Paint Application Specification No.2.

 

 

^{_____________________}

⁶ Reference standard: ISO 8501-l:1988/Suppl:1994. Preparation of steel substrate before application of paints and related products - Visual assessment of surface cleanliness.

 

⁷ Reference standard: ISO 8503-1/2:1988. Preparation of steel substrate before application of paints and related products - Surface roughness characteristics of blast-cleaned steel substrates.

 

⁸ Conductivity measured in accordance with ISO 8502-9:1998. Preparation of steel substrate before application of paints and related products - Test for the assessment of surface cleanliness.

 

⁹ Reference standard: ISO 8501-3:2001 (grade P2). Preparation of steel substrate before application of paints and related products - Visual assessment of surface cleanliness.