1 - AS 1627.4-1989 METAL FINISHING - PREPARATION AND PRETREATMENT OF SURFACES - ABRASIVE BLAST CLEANING
4 - PREFACE
4 - CONTENTS
5 - FOREWORD
6 - SECTION 1. SCOPE AND GENERAL
6 - 1.1 SCOPE.
6 - 1.2 REFERENCEDDOCUMENTS.
6 - 1.3 DEFINITIONS.
6 - 1.3.1 Abrasive
6 - 1.3.2 Abrasive blast cleaning
6 - 1.3.3 Brush (whip) blasting
6 - 1.3.4 Feather edging
6 - 1.3.5 Preparation grades
6 - 1.3.6 Profile comparator
6 - 1.3.7 Selective blasting
6 - 1.3.8 Surface profile
6 - 1.3.9 Threshold limit value
6 - 1.3.10 Visible rust and millscale
6 - 1.3.11 Water blasting
6 - 1.3.12 Wet abrasive blast cleaning
6 - 1.3.13 Wet blasting inhibitor
6 - 1.4 CLASSES OF SURFACE PREPARATION.
6 - 1.4.1 Steel.
7 - 1.4.2 Stainless steel.
7 - 1.4.3 Non-ferrous materials (including galvanized materials)
8 - SECTION 2. METHODS OF OPERATION
8 - 2.1 TYPES OF ABRASIVES.
8 - 2.2 CHOICE OF ABRASIVES.
8 - 2.2.1 General.
9 - 2.2.2 Abrasive selection.
9 - 2.3 ABRASIVE BLAST CLEANING METHODS.
9 - 2.3.1 Dry abrasive blast cleaning.
10 - 2.3.2 Wet abrasive blast cleaning.
10 - 2.4 ABRASIVE BLAST CLEANING -METHOD SELECTION AND PROCEDURE.
10 - 2.4.1 Preliminary cleaning.
10 - 2.4.2 Choice of blast cleaning method.
12 - 2.4.3 Procedure for blast cleaning fabricated metal sections prior to erection
12 - 2.4.4 Procedure for blast cleaning existing structures.
12 - 2.4.5 Final cleaning.
12 - 2.5 SAFETY CONSIDERATIONS AND REQUIREMENTS.
12 - 2.5.1 Health hazards.
12 - 2.5.2 Protective clothing.
12 - 2.5.3 Face and eye protection.
12 - 2.5.4 Ear protection.
12 - 2.5.5 Respiratory protection.
12 - 2.5.6 Safe working guidelines.
13 - 2.5.7 Atmosphere.
13 - 2.5.8 Ventilation.
13 - 2.5.9 Lighting.
14 - APPENDIX A - PURCHASING GUIDELINES
14 - A1 GENERAL.
14 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER.
15 - APPENDIX B - CLASSES OF SURFACE PREPARATION
15 - B1 GENERAL.
15 - B2 CLASS 1 - LIGHT BLAST CLEANING.
15 - B3 CLASS 2 - MEDIUM BLAST CLEANING.
16 - B4 CLASS 2 1/2 - ‘NEAR WHITE’ BLAST CLEANING.
16 - B5 CLASS 3 - ‘WHITE METAL’ BLAST CLEANING.
17 - APPENDIX C - METHODS OF MEASURING THE PROFILE HEIGHT
17 - C1 GENERAL.
17 - C2 REPLICA TAPE METHOD.
17 - C3 DEPTH MICROMETER METHOD.
17 - C4 COMPARISON METHOD.
17 - C5 STYLUS METHOD.
17 - C6 SURFACE REPLICA METHOD.
17 - C7 OPTICAL METHODS.
18 - APPENDIX D - EFFECT OF ABRASIVE SIZE ON SURFACE ROUGHNESS
18 - D1 GENERAL.
18 - D2 REFERENCES.
21 - APPENDIX E - SOLUBLE SALTS
22 - APPENDIX F - WET ABRASIVE BLAST CLEANING CORROSION INHIBITORS