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Annexure 1 QA

The document outlines the coating specifications for C5-M and C4 environment classifications, detailing the types of primer, intermediate, and finish coats required, including their thickness, application methods, and performance standards. For C5-M, a total dry film thickness (DFT) of 325-350 microns is specified, while for C4, the DFT is lower. Additionally, it emphasizes compliance with safety and environmental standards, prohibiting toxic materials in the coatings.

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Amit Sharma
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19 views1 page

Annexure 1 QA

The document outlines the coating specifications for C5-M and C4 environment classifications, detailing the types of primer, intermediate, and finish coats required, including their thickness, application methods, and performance standards. For C5-M, a total dry film thickness (DFT) of 325-350 microns is specified, while for C4, the DFT is lower. Additionally, it emphasizes compliance with safety and environmental standards, prohibiting toxic materials in the coatings.

Uploaded by

Amit Sharma
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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8.3.

1 For C5-M Environment Classification


Primer Coat: 1 coat of self curing inorganic ethyl zinc silicate primer (coating) at 75
microns DFT / Coat to be applied by airless / pressure pot for high durability >15 yrs.
The primer should meet the requirements of SSPC-SP 20 performance standard.
Minimum Metallic Zinc in the dry film by weight must be 85%. Volume solids of the
primer must be 65%

Intermediate coat – 1 coat of Polyamide cured High build epoxy MIO coating at 150
microns DFT/ Coat to be applied by airless spray. Minimum Natural Lamellar Micaceous
Iron Oxide content in the dry film must be 50% by weight. Volume solids of the product
must be 80%

Finish Coat- Two coats of High Build Glossy Aliphatic Acrylic Polyurethane at 50micron
/ coat dry film thickness to be applied by brush/airless spray. Total thickness of the
finish coat will be 100 microns. Volume Solids of the product must be 62%
Total DFT minimum: 325 Microns and maximum: 350 Microns.

Notes:
1. This paint system is equivalent to the protective paint system no’s (S7.14 & S
6.08) recommended for corrosion category C5-M & C5-I in ISO 12944-5.
2. This system is satisfactory for surface temperatures to 90oC continuous dry
temperature.
3. Colour for final coat shall be as per colour code.
4. All material shall be supplied in the manufacturers original cans, durably & legibly
marked with the description of the contents. This shall include the batch
number, date of manufacturing & the manufacturer’s name.
5. All coating materials used shall confirm to the composition clauses given against
each product in the specification. In meeting the composition clauses, the
manufacturer shall provide evidence of compliance from approved third party lab
before start of the job & internal test report along with every supplied batch.
6. Material containing cadmium, lead or any other toxic material to
environment/personnel shall not be used.

8.3.2 For C-4 Environment Classification


Primer Coat: 1 coat of self curing inorganic ethyl zinc silicate primer (coating) at 75
microns DFT / Coat to be applied by airless / pressure pot. The primer should meet the
requirements of IS - 14946 performance standard. Volume solids of the primer must be
80%

Intermediate coat – 1 coat of Polyamide cured High build epoxy MIO coating at 100
microns DFT / Coat to be applied by airless spray. Volume solids of the product must be
80%

Finish Coat- One coat of High Build Glossy Aliphatic Acrylic Polyurethane at 50 micron
/ coat dry film thickness to be applied by brush / airless spray. Volume Solids of the
product must be 80%
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