BS EN 4301:2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Arrangement of marks
   5.1 General
   5.2 General arrangement
6 Coding system
   6.1 Identification marking codes
   6.2 Standard combinations of identification marks
   6.3 Indication on drawings
        6.3.1 General
        6.3.2 Meaning of codes given in example
        6.3.3 Understanding Table 3
7 Character height
8 Writing
9 Depth of marks
10 General marking conditions
   10.1 Introduction
   10.2 Process quality
   10.3 Marking quality
   10.4 Surface treatment
   10.5 Cast/forged parts
   10.6 Temporary production mark
   10.7 Re-marking
   10.8 Final inspection mark
11 Marking methods
   11.1 Permanent markings
   11.2 Temporary markings
Annex A (normative) - Optical Character Recognition (O.C.R.)
Annex B (normative) - Character shapes and optical character
        recognition requirements (O.C.R.) for 5x7 dot matrix
        method
Annex C (normative) - O.C.R. characters - Common characteristics

Defines the coding system for marks, the processes used to produce these marks, as well as the general marking requirements for the identification of aerospace engine items.

This standard describes the coding system for marks, the processes used to produce these marks, as well as the general marking requirements for the identification of aerospace engine items. This document is applicable to items whose engineering drawing or design folder refers to EN 4301 for all issues that are not in contradiction with specific indications appearing on the engineering drawing or in the design folder. This document is not applicable to items requiring an identification plate.