G 458-1 (A)
Subsequent Increase of Operating Pressure of Gas Pipelines made of Steel > 16 bar
Nachträgliche Druckerhöhung von Gas Hochdruckleitungen aus Stahl größer 16 bar
Brief description
This Technical Rule G 458-1 applies to the subsequent pressure increase of gas pipelines made of steel pipes with welded joints to a design pressure (DP) above the previous design pressure, which serve to supply the general public with gas and which are operated with gases in accordance with DVGW Code of Practice G 260, 2nd and 5th gas family (hydrogen). To increase the previous maximum permissible operating pressure MOP of a gas system, it may be necessary to increase the pressure above the previous design pressure. The application applies to pipes whose intended design pressure is more than 16 bar. This technical rule can be applied analogously to pipes made of other materials and steel pipes with detachable connections. For the subsequent pressure increase of gas pipes for gases that do not comply with the provisions of DVGW Code of Practice G 260, this Technical Code can be applied mutatis mutandis, taking into account the specific properties of the gases and any other existing provisions.
