ANNEX
PERFORMANCE STANDARD FOR PROTECTIVE COATINGS
FOR CARGO OIL TANKS OF CRUDE OIL TANKERS
1 PURPOSE
This Standard provides technical requirements for the minimum standard for protective coatings to be applied in cargo oil tanks during the construction of new crude oil tankers.
2 DEFINITIONS
For the purpo of this Standard, the following definitions apply:
2.1 Crude oil tanker is as defined in Annex I of MARPOL 73/78.
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 loo particulate matter prent on a surface prepared for painting, arising from blast-cleaning or other surface preparation process, or resulting from the action of the environment.马化腾英文名
2.5 Edge grinding is the treatment of the edge before condary surface preparation.
2.6 “GOOD” condition is the condition with minor spot rusting as defined in resolution A.744(18) for asssing the ballast tank coatings for tankers.
2.7 Hard coating is a coating that chemically converts during its curing process or a non-convertible air drying coating which may be ud for maintenance purpos. This can be either inorganic or organic.
2.8 NDFT is the nominal dry film thickness. 90/10 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 plant
s (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 uful life is the target value, in years, of the durability for which the coating system is designed.
2.13 Technical Data Sheet is the paint manufacturer’s Product Data Sheet which contains detailed technical instruction and information relevant to the coating and its application.
土黄连的功效与作用PRINCIPLES
3 GENERAL
3.1 The ability of the coating system to reach its target uful life depends on the type of coating system, steel preparation, operating environment, application and coating inspection and maintenance. All the aspects contribute to the good performance of the coating system.
3.2 Inspection of surface preparation and coating process shall be agreed upon between the shipo
wner, the shipyard and the coating manufacturer and prented to the Administration for review. Clear evidence of the inspections shall be reported and included in the Coating Technical File (CTF) (e paragraph 3.4).
3.3 When considering the Standard provided in ction 4, the following is to be taken into account:
.1 it is esntial 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 bad 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 ction 8.
敬老院志愿服务3.4Coating Technical File (CTF)
3.4.1 Specification of the cargo oil tank coating system applied, record of the shipyard’s and shipowner’s coating work, detailed criteria for coating lection, job specifications, inspection, maintenance and repair shall be included in the Coating Technical File required by resolution MSC.215(82).
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:
- product name and identification mark and/or number;
原子城- materials, components and composition of the coating system, colours;
- minimum and maximum dry film thickness;
- application methods, tools and/or machines;
- condition of surface to be coated (de-rusting grade, cleanness, profile, etc.);苏州斜塘老街
and
- environmental limitations (temperature and humidity);
机理研究.3 shipyard work records of coating application,including:
- applied actual areas (in square metres) of coating in each cargo oil tank;
-
梦见海水 applied coating system;
放血
- time of coating, thickness, number of layers, etc.;
- ambient conditions during coating; and
- details 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
reprentative and specifying deviations from the specifications (e annex 2);
inspection report, including:
verified
.6 shipyard’s
- completion date of inspection;
- result of inspection;
- remarks (if given); and
- inspector signature; and
.7 procedures for in-rvice maintenance and repair of coating systems.1
3.4.3In-rvice maintenance and repair
In-rvice maintenance and repair activities shall be recorded in the Coating Technical File in accordance with the relevant ction of the Guidelines for coating maintenance and repair.
3.4.4The Coating Technical File shall be kept on board and maintained throughout the life of the ship.
3.5Health 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.
1Guidelines to be developed by the Organization.
4 COATING
STANDARD
standard
4.1 Performance
This Standard is bad on specifications and requirements to provide a target uful 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 uful life will vary, depending on numerous variables including actual conditions encountered in rvice.
application
4.2 Standard
Protective coatings for cargo oil tanks applied during the construction of new crude oil tankers shall at least comply with the requirements in this Standard.
4.3Coating system
An epoxy-bad system meeting test and physical properties (table 1.1.3) shall be documented, and a Type Approval Certificate or Statement of Compliance shall be provided.
4.4 Area of application
The following areas are the minimum areas that shall be protected according to this Standard:
.1 Deckhead with complete internal structure, including brackets connecting to longitudinal and transver bulkheads. In tanks with ring frame girder
construction the underdeck transver framing to be coated down to level of the
first tripping bracket below the upper faceplate.
.2 Longitudinal and transver bulkheads to be coated to the uppermost means of access level. The uppermost means of access and its supporting brackets to be
fully coated.
.
3 On cargo tank bulkheads without an uppermost means of access the coating to extend to 10% of the tanks height at centreline but need not extend more than 3 m
down from the deck.
.4 Flat inner bottom and all structure to height of 0.3 m above inner bottom to be coated.
Figure 1
application
4.5 Special
4.5.1 This Standard covers protective coating requirements for steel structure within cargo oil tanks. It is noted that there are other independent items that are fitted within the cargo oil tanks and to which coatings are applied to provide protection against corrosion.
4.5.2 It is recommended that this Standard is applied, to the extent practicable, to tho portions of means of access provided for inspection within the areas specified in subction 4.4 that are not integral to the ship structure, such as rails, independent platforms, ladders, etc. Other equivalent methods of providing corrosion protection for non-integral items may also be ud, 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 stiffener depths for walkways, stringers, etc., are to fully comply with this Standard when located within the coated areas.
4.5.3 It is also recommended that supports for piping, measuring devices, etc., be coated as a minimum in accordance with the non-integral items indicated in paragraph 4.5.2.
4.6 Basic coating requirements
4.6.1 The requirements for protective coating systems to be applied at ship construction for the cargo oil tanks of crude oil tankers meeting the performance standard specified in paragraph 4.1 are listed in table 1.
4.6.2 Coating manufacturers shall provide a specification of the protective coating system to satisfy the requirements of table 1 and the operating environment.
