NS EN 10255 : 2004 + A1 2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
5 Information to be supplied by the purchaser
   5.1 Mandatory information
   5.2 Options
   5.3 Examples of ordering
       5.3.1 By outside diameter and thickness
       5.3.2 By thread size and series
6 Manufacturing process
   6.1 Steelmaking process
   6.2 Tube manufacturing process
7 Delivery conditions
   7.1 General
   7.2 Alternative finishes and protection of the tube ends
   7.3 Suitability for hot dip galvanizing
   7.4 Hot dip galvanized condition
8 Requirements
   8.1 General
   8.2 Chemical composition and mechanical properties
   8.3 Appearance
   8.4 Dimensions, masses and tolerances
9 Inspection
   9.1 Type of inspection
   9.2 Inspection documents
   9.3 Tensile test
   9.4 Bend test
   9.5 Flattening test
   9.6 Leak tightness test
   9.7 Dimensional inspection
   9.8 Visual examination
10 Marking
11 Temporary protective coating
Annex A (informative) Correlation between specified outside
        diameter, thread size, and nominal diameter
Annex B (normative) Types of tubes with wall thickness different
        from medium and heavy series
      B.1 General
      B.2 Requirements
      B.3 Marking
Annex ZA (informative) Clauses of this European Standard addressing
         the provisions of the EC Construction Products Directive
         for applications covered by Mandate M 131
      ZA.1 Scope and relevant characteristics
      ZA.2 Procedure of attestation of conformity of pipes
      ZA.3 Evaluation of Conformity
      ZA.4 Declaration of Conformity
      ZA.5 CE Marking and Labelling
Bibliography

Describes the requirements for circular non-alloy steel tubes suitable for welding and threading and provides a number of options for the finish of tube ends and coatings.