NEN EN 12007-4 : 2012

Foreword
1 Scope
2 Normative references
3 Definitions
4 Design
      4.1 General
      4.2 Pressure uprating
      4.3 Selection of renovation technique
      4.4 Consultation with third parties
5 Construction
      5.1 General
      5.2 Disconnection/Reconnection of sections of the
             gas supply system
      5.3 Excavation/No dig techniques
      5.4 Laying
6 Pressure testing
7 Service line transfer
8 Commissioning and decommissioning
9 Record system
Annex A (informative) Chart of renovation techniques
Annex B (informative) Advantages and disadvantages of
                      renovation techniques
Annex C (informative) Renovation with continuous or discrete
                      pipe
Annex D (informative) Lining with close-fit pipe
Annex E (informative) Lining with cured-in-place pipe
Annex F (informative) Renovation by bursting or splitting
                      existing pipe pipe
Annex H (informative) Joint repairs
Annex J (informative) Resin lining
Annex G (informative) Renovation by the pulling or pushing
                      of the existing

Explains the specific functional requirements for polyethylene (PE) pipelines in addition to the general functional requirements of EN 12007-1 for: a) a maximum operating pressure (MOP) up to and including 10 bar; b) an operating temperature between -20 degrees C and +40 degrees C.