Bgas Grade 2 Course

BGAS-CSWIP Painting Inspector Grade 2 ATC88

Rev 3 June 2011 Contents Copyright  TWI Ltd 2013

BGAS-CSWIP Painting Inspector Grade 2 Contents Section

Subject.

1 1.1 1.2

Corrosion Electrical circuit The chemical reaction

2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19

Surface Preparation Methods and Standards Dry abrasive blast cleaning Abrasives Sizing of abrasives Adhesion and profile Profile Shot blasted profile Profile measurement Assessing a profile to BS 7079 Pt C ISO 8503.1 Use of the comparators Using the comparators Preparation of steel substrate before application of paints and related products Abrasive blasting grades Equipment Water blasting Flame cleaning Method Pickling Vapour degreasing Weathering

3

Surface Contaminants and Tests for Detection

4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13

Paint Constituents and Basic Technology Liquid paints containing solvent Solvent free Powders Binder Binder solvent groups and compatibility Polyurethanes use ketones and esters with aromatic diluents. Polymers Linear polymers Branched polymers Cross linked polymers Oils Pigments PVC

1

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4.14 4.15

Solvents Other additives

5

Solutions and Dispersions

6 6.1 6.2 6.3 6.4

Drying and Curing of Paint Films Solvent evaporation Oxidation Chemical curing Coalescence

7 7.1

Paint Systems Primer

8

Water Borne Coatings

9 9.1

Paint Manufacture Direct charge dispersing mills

10 10.1 10.2 10.3 10.4

Testing of Paints for Properties and Performance Tests on paint Paint density Hegman grind gauge Viscosity

11 11.1 11.2 11.3 11.4 11.5 11.6 11.7 11.8 11.9 11.10 11.11 11.12 11.13 11.14

Film Thicknesses Comb gauges Tests done on dry paint films Destructive test gauges Non-destructive test gauges Tests for mechanical properties on paint films Accelerated testing Drying and curing tests BK drying recorders Other tests Trough type Black and white fused plates Hiding power charts and micrometer adjustable film applicator Degree of gloss Adhesion

12 12.1 12.2

Specified Coating Conditions The whirling hygrometer, aspirated hygrometer or psychrometer Steel temperature measurement

13 13.1 13.2 13.3 13.4 13.5

Cathodic Protection Sacrificial anode systems Impressed current system Interference Monitoring CP Cathodic disbondment

14 14.1

Holiday/Pinhole Detection Voltage setting

2

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15 15.1 15.2 15.3 15.4

Paint Application Brush application Roller application Spray application (Conventional, Airless, Elecrostatic) Other paint application methods

16 16.1 16.2 16.3 16.4 16.5 16.6 16.7 16.8 16.9

Metal Coatings Galvanising Sheradising Calorising Anodising Electro-plating Hot metal spraying Powder system Electric arc system Wire and pistol system

17

Coating Faults

18

Colour

19 19.1 19.2 19.3 19.4

Health and Safety Hazard warning symbols Responsibilities Maximum exposure limit (MEL) Occupations exposure standard (OES)

20

Duties of An Inspector

21

List of Specification and British Standards (BS) Numbers

22

Quality

23

Revision Questions Appendix 1

Insulation

Appendix 2 PA 9

Specification for paint systems, properties and performance requirements.

PA10

Specification for now and maintenance painting at works. Site for above ground pipeline and plant installations.

3

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