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Standards Development
This document describes the functional requirements for pipelines for maximum operating
pressure over 16 bar. This document also describes the mechanical requirements for pipework
in stations with a maximum operating pressure greater than 16 bar.
NOTE 1 Welding requirements are described in EN 12732. Functional requirements for
stations are given in EN 1776, EN 1918-5, EN 12186, and EN 12583.
This document is applicable for transporting gas via onshore high-pressure steel pipeline
infrastructures, where the following applies:
- onshore:
- from the point where the pipeline first crosses what is normally accepted as battery limit
between onshore and offshore, and that is not located within commercial or industrial premises
as an integral part of the industrial process on these premises except for any pipelines and
facilities supplying such premises;
- pipeline system with a starting point onshore, also when parts of the pipeline system on
the mainland subsequently cross fjords, lakes, etc.
- high pressure: gas with a maximum operating pressure over 16 bar and a design
temperature between −40 °C and 120 °C.
- steel pipeline infrastructure: infrastructure consisting of pipeline components, such as
pipes, valves, couplings and other equipment, restricted to components made of unalloyed or
low alloyed carbon steel and joined by welds, flanges or mechanical couplings.
- gas: non-corrosive natural gas, biomethane gas, hydrogen gas and mixtures of these
gases where technical evaluation has ensured that operating conditions or constituents or
properties of the gas do not affect the safe operation of the pipeline.
Gas infrastructures covered by this document begin after the gas producer's metering station.
NOTE 2 The functional demarcation of the pipeline system is usually directly after an
isolating valve of the installation, but can differ in particular situations. The functional
demarcation of the pipeline system is usually located on an isolating valve of the installation, but can differ in particular situations.
A schematic representation of pipelines for gas infrastructure is given in Figure 1.
This document can also be applied to the repurposing of existing pipelines.
[Figure 1 - Schematic representation of pipelines for gas supply over 16 bar]
This document specifies common basic principles for gas infrastructure. Users of this standard
are expected to be aware that more detailed national standards and/or code of practice can exist
in the CEN member countries. This document is intended to be applied in association with these national standards and/or
codes of practice setting out the above-mentioned basic principles.
In the event of conflicts in terms of more restrictive requirements in national legislation/regulation
with the requirements of this standard, the national legislation/regulation takes precedence as
illustrated in CEN/TR 13737.
CEN/TR 13737 gives:
- clarification of all legislations/regulations applicable in a member state;
- if appropriate, more restrictive national requirements;
- a national contact point for the latest information.
During the elaboration of WI00234107 'Gas infrastructure - Conversion of pipelines with maximum operating pressure over 16 bar for the use of hydrogen - Functional requirements' it became obvious that is would be more efficient for the application of the requirements to integrate the document into EN 1594 'Gas infrastructure - Pipelines with maximum operating pressure over 16 bar - Functional requirements'. The reason is that the most parts of WI00234107 refer to the requirements in EN 1594 or are also applicable to the design/construction of pipelines, subject to EN 1594.
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