NEN EN 13997 : 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Technical characteristics and requirements
  4.1 Material and method of production of the parts
  4.2 Corrosion resistance and protection against corrosion
      4.2.1 General
      4.2.2 Steel parts
      4.2.3 Parts made of brass
      4.2.4 Parts made of Aluminium alloy
      4.2.5 Parts made of Polypropylene (PP) or Polyvinylchloride (PVC)
  4.3 Dimensions
      4.3.1 General
      4.3.2 Length
      4.3.3 Width
      4.3.4 Height
      4.3.5 Diameter
  4.4 Smoothness of surface
  4.5 Coupling
  4.6 Replacement of parts with spherical couplings in a plant
  4.7 Allowable operating pressure (nominal pressure)
  4.8 Pressure loss
5 Marking
6 Testing
  6.1 Construction and operating tests
      6.1.1 Sampling and test forms
      6.1.2 Test procedure
      6.1.3 Test equipment
      6.1.4 Test conditions
  6.2 Carrying out of test
      6.2.1 General
      6.2.2 Dimensions
      6.2.3 Wall thickness (without corrosion protection)
      6.2.4 Total length of part
      6.2.5 Nominal length of part
      6.2.6 Bending angle
      6.2.7 Replacement
      6.2.8 Pressure loss
      6.2.9 Behaviour under nominal pressure
      6.2.10 Installation of line to be tested
      6.2.11 Supporting of empty part
      6.2.12 Bending test
      6.2.13 Bulging test
      6.2.14 Effects of bulging test
Annex A (informative) Application for test of connection and
                      control accessories according to EN
                      13997 - Form 1
Annex B (informative) Results of test of connection and control
                      accessories carried out according to
                      EN 13997 - Form 2
Bibliography

Describes the technical characteristics and requirements of hydraulic connection and control accessories to ensure a sufficient mechanical resistance for practical use, and specifies the relevant testing methods. It applies to accessories made of steel, brass, aluminium, polypropylene, polyethylene or PVC for use in irrigation systems up to a diameter of 250 mm.