Safety in Welding, Cutting, and Allied Processes

Safety in Welding, Cutting, and Allied Processes
Table of Contents
Page No.
Personnel . iii
Foreword v
List of Tables . x
List of Figures x
Part I—General Aspects 1
1. Purpose and Scope 1
1.1 Purpose . 1
1.2 Scope and Applicability 1
1.3 Exclusions . 2
2. Definitions . 2
2.1 Approved 2
2.2 Confined Space . 3
2.3 Cylinder Storage 3
2.4 Immediately Dangerous to Life or Health (IDLH) 3
2.5 Other Definitions 3
2.6 Qualified Person 3
2.7 Shall 3
2.8 Should 3
2.9 Unit 3
2.10 Welder 3
3. General Provisions, Management, and Supervision . 3
3.1 Setup and Installation 3
3.2 Responsibilities . 4
4. Protection of Personnel and the General Area . 6
4.1 Protection of the General Area . 6
4.2 Eye and Face Protection 6
4.3 Protective Clothing 9
4.4 Noise Control . 10
4.5 Respiratory Protective Equipment 10
4.6 Training 11
5. Ventilation 11
5.1 General 11
5.2 Breathing Zone Sampling 12
5.3 Avoid the Fume 12
5.4 Types of Ventilation 12
5.5 Special Ventilation Concerns . 13
6. Fire Prevention and Protection . 14
6.1 Areas Containing Combustibles . 14
6.2 Fire Protection . 15
ANSI Z49.1:2012
vii6.3 Hot-Work Authorization . 16
6.4 Welding or Cutting Containers 16
7. Confined Spaces . 17
7.1 Ventilation in Confined Spaces 17
7.2 Location of Service Equipment 18
7.3 Adjacent Areas 18
7.4 Emergency Signal 18
7.5 Attendants in Areas Immediately Dangerous to Life or Health (IDLH) . 18
7.6 Brazing Furnaces . 19
8. Public Exhibitions and Demonstrations 19
8.1 Application . 19
8.2 Supervision . 19
8.3 Site 19
8.4 Fire Protection . 20
8.5 Protection of the Public 20
8.6 Cylinders . 20
8.7 Process Hoses, Cables, and Conduits . 21
9. Precautionary Information 21
9.1 General 21
9.2 Precautionary Information for Arc Welding and Related Processes and Equipment . 21
9.3 Precautionary Information for Oxyfuel Gas Processes and Equipment . 21
9.4 Hazardous Materials Information 21
9.5 Brazing Filler Metals Containing Cadmium 22
9.6 Brazing and Gas Welding Fluxes Containing Fluorides . 22
9.7 Material Safety Data Sheets (MSDSs) 22
9.8 Graphic Symbols . 23
9.9 Hazard Communications . 23
Part II—Specific Processes . 24
10. Oxyfuel Gas Welding and Cutting Safety 24
10.1 Scope 24
10.2 Terminology 24
10.3 Oxygen and Combustibles 24
10.4 Attachments for Gas Mixing 24
10.5 Torches 24
10.6 Hose and Hose Connections 25
10.7 Pressure-Reducing Regulators 26
10.8 Compressed and Oxyfuel Gas Cylinders (Containers) 27
10.9 Cylinder Manifolding . 32
11. Arc Welding and Cutting Equipment Safety 32
11.1 General 32
11.2 Safety Aspects in Selection of Arc Welding Equipment 33
11.3 Installation of Arc Welding Equipment . 34
11.4 Operation . 35
11.5 Maintenance 38
12. Resistance Welding Safety . 39
12.1 General 39
12.2 Installation 40
12.3 Guarding . 40
12.4 Electrical . 41
12.5 Static Safety Devices 43
ANSI Z49.1:2012
viii12.6 Ventilation 44
12.7 Maintenance 44
13. Electron Beam Welding and Cutting Processes (EBW and EBC) . 44
13.1 General 44
13.2 Potential Hazards . 44
14. Laser Beam Cutting and Welding . 45
14.1 General 45
15. Brazing and Soldering Safety 45
15.1 General 45
15.2 Potential Hazards . 45
Annex A (Informative)—American Welding Society Safety and Health Standards List 49
Annex B (Informative)—List of Other Sources 51
Annex C (Informative)—List of Publishers . 53
Annex D (Informative)—Master Chart of Welding and Joining Processes and Master Chart of
Allied Processes . 55
Annex E (Informative)—Guidelines for the Preparation of Technical Inquiries for the Z49 Committee 57
ANSI Z49.1:2012
ixList of Tables
Table Page No.
1 Guide for Shade Numbers 8
List of Figures
Figure Page No.
1 Precautionary Information for Arc Welding Processes and Equipment 22
2 Precautionary Information for Oxyfuel Gas Processes and Equipment . 22
3 Precautionary Information for Brazing Filler Metals Containing Cadmium . 23
4 Precautionary Information for Brazing and Gas Welding Fluxes Containing Fluorides 23
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