NEN EN 10305-4 : 2016

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Classification and designation
   5.1 Classification
   5.2 Designation
6 Information to be supplied by the purchaser
   6.1 Mandatory information
   6.2 Options
   6.3 Example of an order
7 Manufacturing process
   7.1 Steelmaking process
   7.2 Tube manufacture and delivery conditions
8 Requirements
   8.1 General
   8.2 Chemical composition
   8.3 Mechanical properties
   8.4 Appearance and soundness
       8.4.1 Appearance
       8.4.2 Internal soundness
   8.5 Dimensions and tolerances
       8.5.1 Outside diameter, inside diameter and wall thickness
       8.5.2 Lengths
       8.5.3 Straightness
       8.5.4 Preparation of ends
9 Inspection
   9.1 Type of inspection
   9.2 Inspection documents
       9.2.1 Type of inspection documents
       9.2.2 Content of inspection documents
   9.3 Summary of inspection and testing
10 Sampling
   10.1 Test unit
   10.2 Preparation of samples and test pieces
        10.2.1 General
11 Test methods
   11.1 Tensile test
   11.2 Flattening test
   11.3 Drift expanding test
   11.4 Dimensional inspection
   11.5 Visual examination
   11.6 Leak tightness test
   11.7 Retests, sorting and reprocessing
12 Marking
13 Protection and packaging
   13.1 Protection
   13.2 Packaging
Annex ZA (informative) Clauses of this European Standard
         addressing essential requirements or other provision
         of EU Directives
Bibliography

Defines the technical delivery conditions for seamless cold drawn steel tubes of circular cross section used in hydraulic and pneumatic power systems.