CEN/TC 234/WG 2 - Gas supply systems up to and including 16 bar and pressure testing

This document describes the specific functional requirements for polyamide (PA) pipelines in addition to the general functional requirements of EN 12007-1 for:
a) a maximum operating pressure (MOP) up to and including 16 bar;
b) an operating temperature between −20 °C and +40 °C.
This document covers one type of pipe:
- PA pipes single layer solid wall.
This document specifies common basic principles for gas infrastructure.
NOTE 1 Users of this document are 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.
NOTE 2 In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this document, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).
CEN/TR 13737 (all parts) give:
- clarification of all legislations/regulations applicable in a member state;
- if appropriate, more restrictive national requirements;
- a national contact point for the latest information.

This European Standard describes the specific functional requirements for steel pipelines in addition to the general functional requirements of EN 12007-1 for maximum operating pressures up to and including 16 bar. 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 codes 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 standard, national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).
CEN/TR 13737 (all parts) gives:
-   clarification of all legislation/regulations applicable in a member state;
-   if appropriate, more restrictive national requirements;
-   a national contact point for the latest information.

This European Standard describes common principles for pressure testing, commissioning and decommissioning of gas infrastructures as covered by the functional European Standards of the Technical Committee CEN/TC 234, see Annex B. They have been extracted from the detailed codes of practice and operating manuals in the member countries.
This European Standard does not cover installation pipework which is covered by EN 1775.
The specified procedures are applicable to strength testing, tightness testing and combined testing. Test pressure levels, test periods and acceptance criteria are not covered by this European Standard.
Additional measures or different methods of testing, commissioning or decommissioning can be required by legislation of the individual member countries or at the discretion of the pipeline operator.
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 should take 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.

This European Standard describes specific functional requirements for the renovation of pipework in existing gas infrastructures. This European Standard is intended to be applied with the requirements of EN 12007-1.
This European Standard does not apply to pipework in above ground installations.
This European Standard covers the various renovation technologies for gas piping in the range of sizes covering gas mains and gas service lines and is intended to be applied in association with EN 12007-1. Certain pipe networks originally for other purposes can be considered for renovation technologies to make them suitable for gas infrastructure.
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 should take precedence as illustrated in FprCEN/TR 13737-1.
FprCEN/TR 13737-1 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.

This European Standard describes the general functional requirements for pipelines up to the point of delivery, and also for buried sections of pipework after the point of delivery, for maximum operating pressures up to and including 16 bar for gaseous fuels in accordance with EN 437:1993+A1:2009, Table 1. It applies to their design, construction, commissioning, decommissioning, operation, maintenance, renovation, extension and other associated works.
This European Standard does not apply to the materials, design, construction, testing and commissioning of gas infrastructures in use prior to the publication of this European Standard. However, this European Standard does apply to the operation, maintenance, renovation and extension of all gas infrastructures.
Specific functional requirements for polyethylene pipelines are given in EN 12007-2, for steel pipelines in EN 12007-3 and for the renovation of pipelines in EN 12007-4. Functional recommendations for pipework for buildings are given in EN 1775. Functional requirements for service lines are given in prEN 12007-5.
Functional requirements for pressure testing, commissioning and decommissioning are given in EN 12327.
Functional requirements for measuring systems are given in EN 1776.
Functional requirements for pressure regulating stations are given in EN 12186.
Functional requirements for pressure regulating installations are given in EN 12279.
Functional requirements for gas transmission are given in EN 1594.
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 should take precedence as illustrated in FprCEN/TR 13737-1.
FprCEN/TR 13737-1 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.

This European Standard describes 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 °C and +40 °C.
This European Standard covers three types of pipe:
-   PE pipes including any identification stripes;
-   PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe;
-   PE pipes with a peelable, contiguous thermoplastics additional layer on the outside of the pipe.
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 should take precedence as illustrated in FprCEN/TR 13737-1.
FprCEN/TR 13737-1 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.

This document specifies requirements on the development and implementation of a safety management system for operators of a gas network with a maximum operating pressure up to and including 16 bar according to EN 12007 (all parts).
This document refers to all activities and processes related to safety aspects and performed by gas operators of a gas network with a maximum operating pressure up to and including 16 bar, including those activities entrusted to contractors. It includes safety-related provisions on operation of the gas network.
The described safety management system is applicable to infrastructure for the distribution of processed, non-toxic and non-corrosive gas of the 2nd gas family as classified in EN 437, including injected gases from non-conventional sources.
NOTE 1   Gases from non-conventional resources can be bio methane, hydrogen, shale gas, synthetic gases and others.
This document can also apply for gas infrastructure conveying only gases from non-conventional sources, such as bio methane grids or gases of the 3rd family as classified in EN 437.
For safety management and pipeline integrity management systems of gas networks with a maximum operating pressure above 16 bar generally EN 16348 applies.
NOTE 2   If minor sections of the gas network are operated with a maximum operating pressure above 16 bar, these can also be managed by an SMS according to this document. For the pipeline integrity management EN 16348 applies.
NOTE 3   If minor sections of a gas transmission network are operated with a maximum operating pressure up to and including 16 bar, this document or EN 16348 can be applied. In any case, for the pipeline integrity management system EN 16348 applies.
Specific requirements for occupational health and safety are excluded from this document. National legislation and other European and/or international standards, e.g. OHSAS 18001, apply.
This document specifies common basic principles for gas infrastructure. It is important that users of this standard are aware that more detailed national standards and/or code of practice may 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 (all parts).
NOTE 4   CEN/TR 13737 (all parts) contains:
-   clarification of relevant legislation/regulations applicable in a country;
-   if appropriate, more restrictive national requirements;
-   national contact point for the latest information.

The field of application of this Technical Specification is the new and existing gas grid starting at the boundary of the delivery station on the premises of the GDSO up to the point of delivery of the customers that can be at a means of isolation (e.g. at the outlet of a LPG storage vessel or at the meter outlet connection) typically nominated by the GDSO and may be defined in national regulations or standards.
For existing installations this Technical Specification does not apply to design, construction, testing and commissioning.
The main objectives of this Technical Specification can be summarized by the following:
- Provide guidance about the minimum necessary requirements to be included in a management system related to safety, security, reliability and efficiency of technical activities (design, construction, testing and commissioning/decommissioning, operation and maintenance).
- Demonstrate that the competencies required in the activities mentioned above concretely find their expression in practice on the plants/installations of the gas distribution networks (e.g. for operations in distribution: odourisation, emergency service, cathodic protection, leak survey, maintenance activities on pressure reduction plants, mains and service lines).

This European Standard describes the specific functional recommendations for steel pipelines in addition to the general functional recommendations of prEN 12007-1 for maximum operating pressures up to and including 16 bar. The European Standard specifies common basic principles for gas supply systems. Users of this European Standard should be aware that more detailed national standards and/or codes of practice can exist in the CEN member countries.

This standard describes the specific functional recommendations for polyethylene (PE) pipelines in addition to the general functional recommendations of prEN 12007-1 for: a) a maximum operating pressure (MOP) up to and including 10 bar; b) an operating temperature between -20°C and +40°C. This European Standard specifies common basic principles for gas supply systems. Users of this European Standard should be aware that more detailed national standards and/or codes of practice can exist in the CEN member countries.

This European standard describes the general functional recommendations for pipelines up to the point of delivery, ans also for buried sections of pipework after the point of delivery, for maximum operationg pressures up to and including 16 bar gaseous fuels in accordance with table 1 pr EN 437:1993. It applies to their design, construction, commissioning, decommissioning, operation, maintenance, renovation, extension and other associated works.

This European standard describes specific functional recommendations for the renovation of pipeworks existing in gas supply systems and includes some requirements for materials other than plastics covered by CEN/TC 155 "Plastics piping and ducting systems". This European standard is intended to be applied in association with prEN 12007-1. This European Standard does not apply to pipework in above ground installations.

This European Standard describes common principles for pressure testing, commissioning and decommissioning of gas supply systems as covered by the European functional standards of the Technical Committee CEN/TC 234 (see Annex B) except for pipework for buildings according to EN 1775. They have been extracted from the detailed codes of practice and operating manuals in the member countries. The specified procedures are applicable to strength testing, tightness testing and combined testing.