Specifies requirements for filters used in eye protectors intended to provide protection against radiation of high intensity emitted during welding and allied operations.
Table of contents
Header
About this publication
Preface
Foreword
1 Scope and general
1.1 Scope
1.2 Referenced documents
1.3 Definitions
1.4 Designation of filters
1.4.1 General
1.4.2 Code number
1.4.3 Shade number
2 General requirements
2.1 Filters for gas welding
2.1.1 Finish
2.1.2 Materials
2.1.3 Visual quality
2.1.4 Viewing area
2.1.5 Uniformity and grading
2.1.6 Thermal stability
2.1.7 Permanence
2.1.8 Dimensions
2.1.9 Optical properties of filters
2.1.9.1 Reference points
2.1.9.2 Direction of measurement
2.1.9.3 Refractive power of filters
2.1.9.4 Prismatic power of filters
2.1.10 Transmittance characteristics
2.1.10.1 Single filters
2.1.10.2 Pairs of filters
2.1.11 Transmittance limits
2.1.12 Scattered light
2.2 Filters for electric welding
2.2.1 Finish
2.2.2 Materials
2.2.3 Visual quality
2.2.4 Viewing area
2.2.5 Uniformity and grading
2.2.6 Thermal stability
2.2.7 Permanence
2.2.8 Dimensions
2.2.9 Optical properties of filters
2.2.9.1 Reference points
2.2.9.2 Refractive power of filters
2.2.9.3 Prismatic power of filters
2.2.10 Transmittance
2.2.10.1 Passive filters
2.2.10.2 Automatic welding filters
2.2.11 Scattered light
2.3 Cover plates
2.3.1 Material and quality
2.3.2 Transmission of visible radiation
2.4 Additional requirements for automatic welding filters
2.4.1 Response times
2.4.2 Holding times
2.4.3 Operating temperatures
2.4.4 Luminous transmittance
3 Testing
3.1 General
3.2 Sequence or grouping of test specimens
3.2.1 Sequence of testing for passive filters
3.2.2 Sequence of testing for automatic welding filters
