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Interline® 925 APPLICATION GUIDELINES BALLAST TANKS Interline® 925 Revision 13 Issue Date: 1st May 2015 Marine Coatings All products supplied and technical advice or recommendations given are subject to our standard Conditions of Sale. Registered in England No. 63604 Registered Office 26th Floor, Portland House, Bressenden Place, London SW1E 5BG Page 1 Application Guidelines Interline® 925 Revision 13 Date 1st May 2015 CONTENTS Page 1. SCOPE AND PURPOSE 3 2. PRODUCT SPECIFICATION AND PRODUCT CURE GRAPHS 4 2.1 Surface Preparation 4 2.2 Specification 4 2.3 Film Thickness 4 2.4 Holding Primer 4 2.5 Notes 5 2.6 Product Cure Graphs 5 3. COATING APPLICATION PROCEDURES 7 4. TECHNICAL INSPECTION AND PROJECT CONTROL 11 5. GENERAL NOTES 12 5.1 Tank condition 12 5.2 Steelwork Preparation 13 5.3 Scaffolding 14 5.4 Ventilation 14 5.5 Dehumidification 15 5.6 Heating 15 5.7 Lighting 16 5.8 Storage at point of application 16 5.9 Grit Blasting 16 5.10 Cleaning 18 5.11 Paint Application 18 5.12 Stripe Coats 19 5.13 Adhesion Testing 20 5.14 Water Testing 22 6. REPAIR PROCEDURES 23 7. HEALTH & SAFETY 24 Marine Coatings All products supplied and technical advice or recommendations given are subject to our standard Conditions of Sale. Registered in England No. 63604 Registered Office 26th Floor, Portland House, Bressenden Place, London SW1E 5BG Page 2 Application Guidelines Interline® 925 Revision 13 Date 1st May 2015 1. SCOPE AND PURPOSE The International Paint Ballast Tank Coating Application Guidelines are produced and revised in accordance with the Worldwide Marine product range. The purpose of the guidelines is to ensure that a coating system, when correctly applied, provides the necessary protection against corrosion. Successful in-service performance of a ballast tank coating system depends upon both the correct choice of coating and the adoption of the correct procedures for surface preparation and paint application. This document provides guidance to the specialised field of ballast tank coating application. It is the result of experience gained by International Paint during the application of sophisticated ballast tank coatings to over 10,100 vessels since 1960. The responsibilities for achieving the specific standards outlined and for carrying out surface preparation and paint application rest with the Contracting Company and Shipyard. Under no circumstances do these responsibilities rest with International Paint. We will generally provide for the presence of a Technical Service Representative at key stages during the performance of the contract. The role of the International Paint Technical Service Representative is advisory only, unless otherwise specified in the terms and conditions of the contract. Marine Coatings All products supplied and technical advice or recommendations given are subject to our standard Conditions of Sale. Registered in England No. 63604 Registered Office 26th Floor, Portland House, Bressenden Place, London SW1E 5BG Page 3 Application Guidelines Interline® 925 Revision 13 Date 1st May 2015 2. PRODUCT SPECIFICATION AND PRODUCT CURE GRAPHS 2.1 SURFACE PREPARATION 2.1.1 Surface Preparation Clean welds, damaged and corroded shop primer by blasting to ISO Standard 8501-1 1 (2007) - Sa2 /2. 1 For PVB and unapproved shop primer grit blast to ISO Standard 8501-1 (2007) - Sa2 /2. For approved, intact, shop primer grit sweep to International Paint Abrasive Sweep Standards for Shop Primed Steel Surfaces (Edition 3) - AS.3, or power tool to JSRA SPSS: 1984 - Pt3. 2.1.2 Application Airless spray 2.2 SPECIFICATION Coat Product Colour Dft (microns) Dft (mils) Full Interline 925 White 300 12 Stripe Interline 925 Cream Stripe Interline 925 White Note: Colours may be interchanged, as may the order in which stripe coats and full coat are applied. 2.3 FILM THICKNESS Maximum Film Thickness When a ballast tank is presented for final dry film thickness inspection, the film thickness distribution will be positively skewed. The majority of readings will vary from the minimum up to 250% of the specified d.f.t. However, in way of areas of tanks that are difficult to paint due to their configuration, e.g. heavily stiffened, and where a degree of significant overthickness is unavoidable, dry film thickness readings up to 400% of that specified can be expected. Minimum Film Thickness When a typical 300 microns specification is used, the specified d.f.t. must be achieved on 90% of the total coated surface area. A minimum d.f.t., equivalent to 90% of that specified, must be achieved on the remaining 10%. For further information, consult International Paint. 2.4 HOLDING-PRIMER An optional coat of Intergard 269, applied at 40 microns (1.57 mils) dft, may be applied as a holding primer if required. Dry film thickness should not exceed 60 microns (2.36 mils) and addition of thinner may be necessary in order to achieve close control of film thickness. Refer to technical datasheet for thinner recommendations and overcoating intervals. Marine Coatings All products supplied and technical advice or recommendations given are subject to our standard Conditions of Sale. Registered in England No. 63604 Registered Office 26th Floor, Portland House, Bressenden Place, London SW1E 5BG Page 4 Application Guidelines Interline® 925 Revision 13 Date 1st May 2015 2.5 NOTES 2.5.1 Refer to the accompanying graphs for recommended overcoating intervals, pot life and curing requirements. 2.5.2 The drying times quoted refer to a single coat applied to give 300 microns (12 mils) dry film thickness. At higher film thicknesses drying times may be extended, particularly at low temperature. 2.5.3 Touch up of damages caused during destaging is to be done by brush with Interline 925 to a minimum dry film thickness of 270 microns (10.6 mils). 2.5.4 All thicknesses are to be checked by the International Paint Technical Service Representative on site. Any substandard areas are to be rectified. 2.5.5 For application the steel temperature must not be lower than 10°C (50°F) and should not exceed 40°C (104°F). 2.5.6 At ambient temperatures below 30°C (86°F) an in-line heater or hot twin feed unit is needed to assist application. Consult International Paint for detailed instructions. 2.5.7 Areas of overspray are to be sanded down prior to overcoating. 2.5.8 Humidity control is required during application of Interline 925. The climatic conditions within the tank must be controlled to maintain a maximum relative humidity of 50% at temperatures between 10-15°C (50-60°F), and a maximum relative humidity of 60% at temperatures of 16°C (61°F) and above. 2.5.9 Maximum overcoating intervals may need to be reduced when application takes place in conditions of poor ventilation. Consult International Paint. 2.6 PRODUCT CURE GRAPHS 2.6.1 Pot Life 2.6.2 Touch Dry Times 2.6.3 Hard Dry Times 2.6.4 Times to Ballast 2.6.5 Minimum Overcoating Intervals 2.6.6 Maximum Overcoating Intervals Marine Coatings All products supplied and technical advice or recommendations given are subject to our standard Conditions of Sale. Registered in England No. 63604 Registered Office 26th Floor, Portland House, Bressenden Place, London SW1E 5BG Page 5 Application Guidelines Interline® 925 Revision 13 Date 1st May 2015 Interline 925: Pot Life Interline 925: Touch Dry Temperature (°F) Temperature (°F) 50 59 68 77 86 95 104 50 59 68 77 86 95 104 2 16 14 1.5 12 ) ) s s r r 10 u u o o H 1 H 8 ( ( e e 6 m m i i T 0.5 T 4 2 0 0 10 15 20 25 30 35 40 10 15 20 25 30 35 40 Temperature (°C) Temperature (°C) Interline 925: Hard Dry Interline 925: Time to Ballast Temperature (°F) Temperature (°F) 50 59 68 77 86 95 104 50 59 68 77 86 95 104 36 14 30 12 ) 10 ) s 24 s r y u a o 8 D H 18 ( ( e e 6 m m i i 12 T T 4 6 2 0 0 10 15 20 25 30 35 40 10 15 20 25 30 35 40 Temperature (°C) Temperature (°C) Interline 925: Minimum Overcoating Interline 925: Maximum Overcoating Temperature (°F) Temperature (°F) 50 59 68 77 86 95 104 50 59 68 77 86 95 104 36 5 30 4 ) ) s s r 24 y u 3 a o D H 18 ( ( e e 2 m m i i 12 T T 6 1 0 0 10 15 20 25 30 35 40 10 15 20 25 30 35 40 Temperature (°C) Temperature (°C) Marine Coatings All products supplied and technical advice or recommendations given are subject to our standard Conditions of Sale. Registered in England No. 63604 Registered Office 26th Floor, Portland House, Bressenden Place, London SW1E 5BG Page 6 Application Guidelines Interline® 925 Revision 13 Date 1st May 2015 3. COATING APPLICATION PROCEDURES 3.1 FOR IN-SITU APPLICATIONS 3.1.1 Remove weld spatter and grind sharp edges and uneven welds until smooth. 3.1.2 Ensure intact shop-primer (if to remain) is clean, dry and free from contamination. If necessary, wash with detergent / fresh water. Any detergent used should be neutral and fresh water rinsable to ensure total removal of contamination. 1 3.1.3 Grit blast welds, damages and areas of corrosion to ISO Standard 8501-1 (2007) - Sa2 /2, or power tool clean to JSRA SPSS: 1984 - Pt3. 3.1.4 Grit sweep high zinc or non-approved shop-primers to the specified standard. 3.1.5 Upon completion of the blasting, and after inspection by the Contractor Quality Control Department, the International Paint Technical Service Representative will also inspect the whole area and mark up any substandard areas.
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