1 Scope
This European Standard describes the specific functional requirements for service lines in addition to the general functional requirements of EN 12007‑1 for:
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a) a maximum operating pressure (MOP) up to and including 16 bar;
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b) an operating temperature between -20 °C and +40 °C.
It applies to their design, construction, commissioning, decommissioning, operation,
maintenance, extension and other associated works. The service line is the physical asset comprising of pipework from the gas main branch saddle or top tee to the outlet of the distribution system operator’s nominated
point(s) of delivery (for example: isolation valve, regulator, meter connection or
combination of regulator and isolation valve).
The ownership and operation responsibility can vary between member states. The extent
of the service line can differ in each member state. To illustrate this, the various points of deliveries
are indicated in Figure 1. Consult Figure 1 (A/B/C/D/E) and member state regulations and standards.
NOTE The valve at point A is not necessarily utilised by each member state.
National preference for points of deliveries should be stated in the national foreword.
Figure 1
—
Distribution system operator nominated point of delivery
| P | gas main |
| T | Top Tee / Branch Saddle |
| M/R | Meter and/or Regulator |
| Distribution system operator nominated Point(s) of Delivery: | |
| A | outlet of below ground service line valve outside the building |
| B | outlet of above ground service line valve outside the building |
| C | outlet of meter/regulator outside the building |
| D | outlet of above ground service line valve inside the building |
| E | outlet of meter/regulator inside the building |
Specific functional requirements for:
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— polyethylene pipelines are given in EN 12007‑2.
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— steel pipelines are given in EN 12007‑3.
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— pipework for buildings are given in EN 1775.
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— pressure regulating installations are given in EN 12279 or EN 12186.
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— pressure testing, commissioning and decommissioning are given in EN 12327.
This European Standard represents the recommendations at the time of its preparation.
It does not apply retrospectively to installations before the publication date unless
specifically stated.
This European Standard specifies common basic principles for gas infrastructure. Users of this European Standard should be aware that more detailed national standards
and/or code of practice may exist in the CEN member countries. This European Standard
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 European Standard, the national legislation/regulation
takes precedence as illustrated in CEN/TR 13737 (all parts).
CEN/TR 13737
(all parts) gives:
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— clarification of all legislations/regulations applicable in a member state;
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— if appropriate, more restrictive national requirements;
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— a national contact point for the latest information.