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Nguyen Cong Thuan/ JPS DNV Vinashin Training/ 2007 Tech. Data & Calculations Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 Technical data and calculations • An inspector is required to be able to carry out simple calculations related to the coatings, like WFT vs. DFT, volumes required for specific jobs, spreading rates, consumptions, simple cost calculations, solid content and thinning, etc. • Participants will be given the various formulations for calculation and required data during this course. • They must however know where to find such information on their own once the course has finished Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 Technical Data • Most of the product data we need for carrying out inspections and for carrying out necessary calculations can be found in the Technical Data Sheets (TDS) and/or in the Material Safety Data Sheets (MSDS). Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 TDS for inspections & calculations • Corresponding DFT & WFT – Minimum – Maximum – Typical • Physical properties – Vol% solid – Flash point – VOC • Surface preparation – On various substrates • Application requirements – Ambient conditions – Methods • Application Data – Mixing ratio – Induction time – Pot life – Thinner No. – Airless spray data – Thinning • Drying times – At various temperatures • Typical system – Nos. coats – DFT • Pack size Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 MSDS for inspections & calculations I mportant sections: 1. Identification – Where to contact for more info. 2. Composition – Hazardous ingredients 3. Hazard identification – Warnings 4. First-aid measures – What to do in an emergency 5. Fire-fighting measures 6. Accidental release – Spillage 7. Handling & storage 8. Personal protection – What PPE must be used 9. Physical properties – Colour / Odour – Flash point – Density (Sp.G.) – Lower explosion limit – Solubility 10.Stability – Reactive? 11.Toxicological – Danger to humans 12.Ecological – Environment 13.Disposal – waste 14.Transport 15.Regulation 16.Other Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 CALCULATIONS • Can you calculate how high wet thickness to apply of a product with 65% solid content that has been diluted 15%, in order to achieve a dry film thickness of 60 microns, and how much will the total paint and thinner cost should when applying two such coats on the outside of a cylindrical 8 meter high tank with diameter 12 meter, when the loss is estimated to be 35% and the purchase price is $8.25 for the paint and $2.90 for the thinner? • You cannot? By the end of this course you should be able to (might be included in the final examination) Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 Calculations : Paint Abbreviations WFT = Wet Film Thickness DFT = Dry Film Thickness % VS = Percent Volume Solids LF = Loss Factor DV = Dead Volume Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 Wet Film calculations • 1 litre covers 1 m 2 in 1000 microns wet • 1 litre covers 10 m 2 in 100 microns wet • RATIO: Meaning: Sq.m ./ ltr * W FT = 1000 1 : 1 : 100 0 litre sq.meter wet film thickness Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 Exam ple: WFT= 250 µm % VS= 50 % DFT= = 125 µm WFT x % VS 100 250 x 50 100 Formula for determining the DFT Formula: DFT = Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 Formula for determining the WFT Exam ple: DFT = 100 µm % VS = 65 % WFT = = 154 µm DFT x 100 % % VS 100 x 100 % 65 % Formula : WFT = . Training/ 2007 Tech. Data & Calculations Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 Technical data and calculations • An inspector is required to be able to carry out simple calculations. Vinashin Training/ 2007 Technical Data • Most of the product data we need for carrying out inspections and for carrying out necessary calculations can be found in the Technical Data Sheets (TDS) and/or. (TDS) and/or in the Material Safety Data Sheets (MSDS). Nguyen Cong Thuan/JPS DNV Vinashin Training/ 2007 TDS for inspections & calculations • Corresponding DFT & WFT – Minimum – Maximum –