NEN EN 10253-1 : 1999

Foreword
1 Scope
      1.1 Scope
      1.2 Limitation of use
      1.3 Technical delivery conditions
2 Normative references
3 Definitions and symbols
      3.1 Definitions
      3.2 Symbols
4 Information to be supplied by the purchaser
      4.1 Mandatory information
      4.2 Options
      4.3 Examples
5 Manufacturing process
      5.1 Steelmaking process
      5.2 Fitting-making process and heat treatment
6 Metallurgical properties
      6.1 Chemical composition
      6.2 Mechanical characteristics
      6.3 Weldability
7 Dimensions and tolerances
      7.1 Dimensions
      7.2 Tolerances and dimensions
      7.3 End finishing
8 Appearance, imperfections and repair
      8.1 Appearance
      8.2 Imperfections
      8.3 Repair
9 Inspection and testing
      9.1 General
      9.2 Inspection documents
      9.3 Summary of inspection and testing
      9.4 Inspection and test methods
10 Marking
11 Protection and packaging
Annex A (normative) Alternative specification for all types
                    of fittings
      A.1 - Steel grade
      A.2 - Dimensions
Annex B (informative) A-deviation

Specifies requirements for steel butt-welding fittings, namely elbows and return bends, concentric reducers, equal and reducing tees, bulged bottoms and caps.