Gas supply systems - Gas installation pipework with an operating pressure greater than 0,5 bar for industrial installations and greater than 5 bar for industrial and non-industrial installations - Part 2: Detailed functional requirements for commissioning, operation and maintenance

This European Standard specifies detailed functional requirements for the commissioning, operation and maintenance of
-   industrial gas installations and assemblies with an operating pressure greater than 0,5 bar and of
-   non-industrial gas installations (residential and commercial) with an operating pressure greater than 5 bar,
starting from the outlet of the network operator’s point of delivery up to the inlet connection to the gas appliance; normally the inlet isolation valve. This European Standard also covers the pipework to the inlet connection of a gas appliance that is not included within the scope of the appliance standard.
NOTE   The use of the term installation and pipework is interchangeable.
Apart from the exceptions stated below, this standard applies to gas installations operating at ambient temperatures between -20 °C and 40 °C and operating pressures up to and including 60 bar. For operating conditions outside these limitations, reference should additionally be made to EN 13480 for metallic pipework.
For industrial gas installations up to and including 0,5 bar and for non-industrial (residential and commercial) gas installations up to and including 5 bar EN 1775 applies.
For gas installations that do not fall within the scope of EN 1775 or other European Standards, this European Standard applies.
In this European Standard, the term "gas" refers to combustible gases, which are gaseous at 15 °C and 1 013 mbar absolute atmospheric pressure. These gases are commonly referred to as manufactured gas, natural gas or Liquefied Petroleum Gas (LPG). They are also referred to as first, second or third family gases as classified in Table 1 of EN 437:2003+A1:2009. The given values are considered as normal conditions for all volumes given in this standard.
This European Standard is applicable to installation pipework for the carriage of:
-   processed, non-toxic and non-corrosive natural gas according to EN 437:2003+A1:2009 and EN 16726 -Gas infrastructure - Quality of gas - Group H”,
-   vaporized LNG,
-   biomethane, complying with EN 16723-1,
-   vaporized LNG.
NOTE   The specification of vaporized LNG is equal to that of natural gas as classified in EN 437:2003+A1:2009.
This European Standard does not cover pipework for hydrogen rich gases that fall outside the definitions within EN 437:2003+A1:2009. LPG storage vessels (including all ancillaries fitted directly to storage vessels) are excluded. Also excluded are LPG installations and sections of LPG installations operating at vapour pressure (e.g. between the storage vessel and its pressure regulator).
In this European Standard, all pressures are gauge pressures unless otherwise stated.
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 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.
For gas installations within the scope of this standard, national legislation and regulations have to be taken into account.
Functional requirements for design, selection of materials, construction, inspection and testing of industrial gas installations and assemblies with an operating pressure greater than 0,5 bar and of gas installations greater than 5 bar in buildings and areas intended for residential, commercial, public and mixed uses are described in EN 15001-1.
Generally, additional safety precautions may be necessary where non odorized gas is used. For non-industrial purposes, the gas should be odorized.

Gasversorgungssysteme - Gas-Leitungsanlagen mit einem Betriebsdruck größer 0,5 bar für industrielle Installationen und größer 5 bar für industrielle und nicht-industrielle Installationen - Teil 2: Detaillierte funktionale Anforderungen an Inbetriebnahme, Betrieb und Instandhaltung

Dieses Dokument legt detailliert die funktionalen Anforderungen hinsichtlich Inbetriebnahme, Betrieb und Instandhaltung von:
—   industriellen Gasleitungsanlagen und Baugruppen mit einem Betriebsdruck größer 0,5 bar; und
—   nicht-industriellen Gasleitungsanlagen (Haushalte und Gewerbebetriebe) mit einem Betriebsdruck größer 5 bar,
beginnend am Ausgangsanschluss der Übergabestelle des Netzbetreibers bis zum Eingangsanschluss der Gasgeräte, d. h. in der Regel der Absperrarmatur vor dem Gerät, fest. Dieses Dokument gilt auch für die Rohrleitungen zum Eingangsanschluss der Gasgeräte, die nicht in den Anwendungsbereich der Gasgerätenorm fallen.
Abgesehen von den nachstehend angegebenen Ausnahmen gilt dieses Dokument für den Betrieb von Gasleitungsanlagen bei Umgebungstemperaturen zwischen –20 °C und 40 °C mit Betriebsdrücken bis einschließlich 60 bar. Bei Betriebszuständen außerhalb dieser Grenzen wird zusätzlich auf EN 13480 für metallische Rohrleitungen Bezug genommen.
Für industrielle Gasleitungsanlagen mit Betriebsdrücken bis einschließlich 0,5 bar und für nicht-industrielle Gasleitungsanlagen (Haushalte und Gewerbebetriebe) mit Betriebsdrücken bis einschließlich 5 bar gilt EN 1775.
Diese Europäische Norm gilt für Gasleitungsanlagen, die nicht in den Anwendungsbereich der EN 1775 oder anderer Europäischer Normen fallen.

Infrastructures gazières - Canalisations d'installation de gaz avec une pression de service supérieure à 0,5 bar pour les installations industrielles et supérieure à 5 bar pour les installations industrielles et non industrielles - Partie 2 : Exigences fonctionnelles détaillées pour la mise en service, l'exploitation et la maintenance

l’exploitation et à la maintenance :
- des installations et ensembles de gaz industriels fonctionnant à une pression supérieure à 0,5 bar et aux ;
- installations de gaz non industrielles (résidentielles et commerciales) fonctionnant à une pression supérieure à 5 bar ;
allant de la sortie du point de livraison de l’opérateur de réseau jusqu’à la connexion d’entrée de l’appareil à gaz, normalement le robinet de sectionnement d’entrée. Cette norme couvre aussi la tuyauterie de la connexion d’entrée d’un appareil à gaz qui n’est pas couverte par la norme de l’appareil.
NOTE 1 Les termes « installation » et « tuyauterie » sont interchangeables.
Outre les exceptions énoncées ci-après, la présente norme s’applique aux installations de gaz fonctionnant à des températures ambiantes comprises entre - 20 °C et 40 °C et des pressions de service inférieures ou égales à 60 bar. Pour des conditions d’exploitation à l’extérieur de ces limites, il convient qu’il soit fait référence à la norme EN 13480 concernant les tuyauteries métalliques.
Pour les installations de gaz industrielles inférieures ou égales à 0,5 bar et pour les installations de gaz non industrielles (résidentielles et commerciales) fonctionnant à une pression inférieure ou égale à 5 bar, c’est l’EN 1775 qui s’applique.
La présente norme s’applique aux installations de gaz qui n’entrent pas dans le domaine d’application de la norme EN 1775 ou d’autres normes européennes.
Dans la présente Norme, le terme « gaz » se rapporte à des gaz combustibles se présentant sous forme gazeuse à 15 °C et à 1 013 mbar de pression atmosphérique absolue. Ces gaz sont couramment appelés gaz manufacturés, gaz naturel ou gaz de pétrole liquéfié (GPL). Ils sont aussi dénommés gaz de la 1ère, 2e ou 3e famille respectivement selon le classement de l’EN 437:2003+A1:2009, Tableau 1. Les valeurs données sont considérées aux conditions normales pour tous les volumes donnés dans cette norme.
La présente Norme européenne s’applique aux canalisations d'installations pour le transport du :
- gaz traité, non toxique et non corrosif, naturel, conformément à l’EN 437:2003+A1:2009 et à l’EN 16726, « Infrastructures gazières - Qualité du gaz - Groupe H » ;
- GNL vaporisé ;
- biométhane, conforme à l’EN 16723-1 ;
- GNL vaporisé.
NOTE 2 La spécification du GNL vaporisé équivaut à celle du gaz naturel classé dans l’EN 437:2003+A1:2009.
La présente Norme européenne ne couvre pas la tuyauterie pour les gaz riches en hydrogène ne relevant pas de la définition figurant dans l’EN 437:2003+A1:2009. Les réservoirs de stockage de GPL (y compris tous les accessoires fixés directement sur les réservoirs) sont exclus. Il en est de même pour les installations de GPL et les parties d'installations de GPL exploitées à la pression de vapeur (par exemple entre le réservoir de stockage et son régulateur de pression).

Sistemi oskrbe s plinom - Plinske napeljave z delovnim tlakom nad 0,5 bar za industrijsko uporabo in delovnim tlakom nad 5 bar za industrijsko in neindustrijsko uporabo - 2. del: Podrobne funkcionalne zahteve za začetek obratovanja, obratovanje in vzdrževanje

General Information

Status
Not Published
Current Stage
6055 - CEN Ratification completed (DOR) - Publishing
Due Date
10-Dec-2018

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SLOVENSKI STANDARD
oSIST prEN 15001-2:2017
01-julij-2017
6LVWHPLRVNUEHVSOLQRP3OLQVNHQDSHOMDYH]GHORYQLPWODNRPQDGEDU]D
LQGXVWULMVNRXSRUDERLQGHORYQLPWODNRPQDGEDU]DLQGXVWULMVNRLQ
QHLQGXVWULMVNRXSRUDERGHO3RGUREQHIXQNFLRQDOQH]DKWHYH]D]DþHWHN
REUDWRYDQMDREUDWRYDQMHLQY]GUåHYDQMH

Gas supply systems - Gas installation pipework with an operating pressure greater than

0,5 bar for industrial installations and greater than 5 bar for industrial and non-industrial

installations - Part 2: Detailed functional requirements for commissioning, operation and

maintenance

Gasversorgungssysteme - Gas-Leitungsanlagen mit einem Betriebsdruck größer 0.5 bar

für industrielle Installationen und größer 5 bar für industrielle und nicht-industrielle

Installationen - Teil 2: Detaillierte funktionale Anforderungen an Inbetriebnahme, Betrieb

und Instandhaltung

Alimentation en gaz - Installation intérieure de pression de service plus de 0.5 bar pour

les installations industrielles et plus de 5 bar pour les installations industrielles et non-

industrielles - Partie 2 : Prescriptions fonctionelles et détaillées pour la mise en service,

l'exploitation et la maintenance
Ta slovenski standard je istoveten z: prEN 15001-2
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
oSIST prEN 15001-2:2017 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 15001-2:2017
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oSIST prEN 15001-2:2017
DRAFT
EUROPEAN STANDARD
prEN 15001-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2017
ICS 91.140.40; 23.040.01 Will supersede EN 15001-2:2008
English Version
Gas supply systems - Gas installation pipework with an
operating pressure greater than 0,5 bar for industrial
installations and greater than 5 bar for industrial and non-
industrial installations - Part 2: Detailed functional
requirements for commissioning, operation and
maintenance

Alimentation en gaz - Installation intérieure de Gasversorgungssysteme - Gas-Leitungsanlagen mit

pression de service plus de 0.5 bar pour les einem Betriebsdruck größer 0.5 bar für industrielle

installations industrielles et plus de 5 bar pour les Installationen und größer 5 bar für industrielle und

installations industrielles et non-industrielles - Partie 2 nicht-industrielle Installationen - Teil 2: Detaillierte

: Prescriptions fonctionelles et détaillées pour la mise funktionale Anforderungen an Inbetriebnahme, Betrieb

en service, l'exploitation et la maintenance und Instandhaltung

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 234.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15001-2:2017 E

worldwide for CEN national Members.
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Contents Page

European foreword ....................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 6

3.1 Definitions relating to pressure ................................................................................................................. 6

3.2 Definitions relating to the gas installation ............................................................................................ 7

3.3 Definitions relating to means of isolation .............................................................................................. 8

3.4 Definitions relating to components .......................................................................................................... 8

3.5 Definitions relating to tests ......................................................................................................................... 8

3.6 Definitions relating to commissioning, operation and maintenance ........................................... 9

3.7 Definitions relating to pressure regulating and metering ............................................................ 10

4 General ............................................................................................................................................................. 10

4.1 Installation drawings and technical file............................................................................................... 10

4.2 Changes affecting an existing installation ........................................................................................... 11

4.3 Quality system ............................................................................................................................................... 11

4.4 Protection against hazards ....................................................................................................................... 11

4.4.1 Electrical installation in hazardous area ............................................................................................. 11

4.4.2 Gas detection systems ................................................................................................................................ 11

4.5 Protection against adverse influences ................................................................................................. 12

5 Commissioning .............................................................................................................................................. 12

5.1 General ............................................................................................................................................................. 12

5.2 Purging ............................................................................................................................................................. 12

5.2.1 General ............................................................................................................................................................. 12

5.2.2 Setting and checking regulators and safety devices ........................................................................ 13

5.2.3 Inspection of gas pressure boosters/compressors .......................................................................... 13

6 Operation and maintenance ..................................................................................................................... 13

6.1 Requirements involving operation and maintenance .................................................................... 13

6.1.1 Identification of buried services ............................................................................................................. 13

6.1.2 Depth of cover ............................................................................................................................................... 13

6.1.3 External hazards ........................................................................................................................................... 14

6.1.4 Supporting structures ................................................................................................................................ 14

6.2 Operation ........................................................................................................................................................ 14

6.2.1 General ............................................................................................................................................................. 14

6.2.2 Properties of fuel gas .................................................................................................................................. 14

6.2.3 Pressure control systems .......................................................................................................................... 15

6.2.4 Effects of construction and other activities on the installation................................................... 15

6.2.5 Prevention of migration of gas into buildings ................................................................................... 15

6.2.6 Trees and plants ........................................................................................................................................... 15

6.2.7 Emergencies ................................................................................................................................................... 15

6.3 Maintenance ................................................................................................................................................... 16

6.3.1 General ............................................................................................................................................................. 16

6.3.2 Safety engineering ....................................................................................................................................... 16

6.3.3 Appliance isolating valves......................................................................................................................... 17

6.3.4 Identification of above-ground gas pipework ................................................................................... 17

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6.3.5 Detail engineering ........................................................................................................................................ 17

6.3.6 Work on pipework ....................................................................................................................................... 17

6.3.7 Inspections ...................................................................................................................................................... 18

6.3.8 Operability check on valves ...................................................................................................................... 19

6.3.9 Pressure control systems........................................................................................................................... 20

6.3.10 Pressure settings .......................................................................................................................................... 20

6.3.11 Installation of pressure regulating systems ....................................................................................... 20

6.3.12 Filters and liquid separators .................................................................................................................... 20

6.3.13 Corrosion protection ................................................................................................................................... 20

6.3.14 Hazardous areas............................................................................................................................................ 21

6.3.15 Hot working in hazardous areas ............................................................................................................. 21

6.3.16 Hot tapping...................................................................................................................................................... 22

Annex A (informative) Significant technical changes between this European standard and

the previous version EN 15001-2:2008 ................................................................................................ 23

Bibliography ................................................................................................................................................................. 25

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European foreword

This document (prEN 15001-2:2017) has been prepared by Technical Committee CEN/TC 234 “Gas

supply”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15001-2:2008.

A list of the significant changes compared to EN 15001-2:2008 can be found in Annex A, Table A.1.

The scope of this revised standard is extended with biomethane and vaporized LNG gases. This

standard is not designed for various mixtures of natural gas and hydrogen which may be allowed in the

different member states.

With respect to hydrogen there are proposals to inject hydrogen (H2) from renewable sources into the

natural gas network. Investigations have been conducted to evaluate the impact. According to EN 16726

at present it is not possible to specify a limiting hydrogen value which would generally be valid for all

parts of the European gas infrastructure.

There is a complete suite of functional standards prepared by CEN/TC 234 “Gas infrastructure” to cover

all parts of the gas supply system from the input of gas to the transmission system up to the inlet

connection of the gas appliances, whether for domestic, commercial or industrial purposes.

In preparing this standard, a basic understanding of gas supply by the user has been assumed.

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.
NOTE CEN/TR 13737 contains:
— clarification of relevant legislation/regulations applicable in a country;
— if appropriate, more restrictive national requirements;
— national contact point for the latest information.

Gas supply systems are complex and the importance on safety of their construction and use has led to

the development of very detailed codes of practice and operating manuals in the member countries.

These detailed statements embrace recognized standards of gas engineering and the specific

requirements imposed by the legal structures of the member countries.
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1 Scope

This European Standard specifies detailed functional requirements for the commissioning, operation

and maintenance of

— industrial gas installations and assemblies with an operating pressure greater than 0,5 bar; and of

— non-industrial gas installations (residential and commercial) with an operating pressure greater

than 5 bar,

starting from the outlet of the network operator’s point of delivery up to the inlet connection to the gas

appliance; normally the inlet isolation valve. This European Standard also covers the pipework to the

inlet connection of a gas appliance that is not included within the scope of the appliance standard.

NOTE 1 The use of the term installation and pipework is interchangeable.

Apart from the exceptions stated below, this standard applies to gas installations operating at ambient

temperatures between –20 °C and 40 °C and operating pressures up to and including 60 bar. For

operating conditions outside these limitations, reference should additionally be made to EN 13480 for

metallic pipework.

For industrial gas installations up to and including 0,5 bar and for non-industrial (residential and

commercial) gas installations up to and including 5 bar EN 1775 applies.

For gas installations that do not fall within the scope of EN 1775 or other European Standards, this

European Standard applies.

In this European Standard, the term “gas“ refers to combustible gases, which are gaseous at 15 °C and

1 013 mbar absolute atmospheric pressure. These gases are commonly referred to as manufactured gas,

natural gas or Liquefied Petroleum Gas (LPG). They are also referred to as first, second or third family

gases as classified in EN 437:2003+A1:2009., Table 1 The given values are considered as normal

conditions for all volumes given in this standard.

This European Standard is applicable to installation pipework for the carriage of:

— processed, non-toxic and non-corrosive natural gas according to EN 437:2003+A1:2009 and

EN 16726 “Gas infrastructure - Quality of gas - Group H”;
— vaporized LNG;
— biomethane, complying with EN 16723-1;
— vaporized LNG.

NOTE 2 The specification of vaporized LNG is equal to that of natural gas as classified in

EN 437:2003+A1:2009.

This European Standard does not cover pipework for hydrogen rich gases that fall outside the

definitions within EN 437:2003+A1:2009. LPG storage vessels (including all ancillaries fitted directly to

storage vessels) are excluded. Also excluded are LPG installations and sections of LPG installations

operating at vapour pressure (e.g. between the storage vessel and its pressure regulator).

In this European Standard, all pressures are gauge pressures unless otherwise stated.

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 code of practice may

exist in the CEN member countries.
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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.

For gas installations within the scope of this standard, national legislation and regulations are meant to

be taken into account.

Functional requirements for design, selection of materials, construction, inspection and testing of

industrial gas installations and assemblies with an operating pressure greater than 0,5 bar and of gas

installations greater than 5 bar in buildings and areas intended for residential, commercial, public and

mixed uses are described in EN 15001-1.

Generally, additional safety precautions may be necessary where non odorized gas is used. For non-

industrial purposes, the gas should be odorized.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

EN 12954, Cathodic protection of buried or immersed metallic structures - General principles and

application for pipelines

prEN 15001-1:2017, Gas Infrastructure - Gas installation pipework with an operating pressure greater

than 0,5 bar for industrial installations and greater than 5 bar for industrial and non-industrial

installations - Part 1: Detailed functional requirements for design, materials, construction, inspection and

testing

EN 60079-14, Explosive atmospheres - Part 14: Electrical installations design, selection and erection

EN 60079-17, Explosive atmospheres — Part 17: Electrical installations inspection and maintenance

EN 60079-29-1, Explosive atmospheres — Part 29-1: Gas detectors – Performance requirements of

detectors for flammable gases
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Definitions relating to pressure
3.1.1
pressure
gauge pressure of the fluid inside the system, measured in static conditions
3.1.2
maximum allowable pressure

maximum pressure for which pipework is designed in accordance with the strength requirements in

this document

Note 1 to entry: For this standard, PS is equivalent to the design pressure (DP).

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3.1.3
maximum incidental pressure
MIP

maximum pressure which pipework can experience during a short time, limited by the safety devices

3.1.4
operating pressure
pressure which occurs within pipework under normal operating conditions
3.2 Definitions relating to the gas installation
3.2.1
pipework
assembly of pipes and fittings
3.2.2
component

item from which a gas supply system or installation is constructed and for which a distinction is drawn

between the following groups of components:

— ancillaries (for example pressure regulators, valves, safety devices, expansion joints, and insulating

joints);
— pipes, including bends made from pipe;
— instrumentation pipework;

— fittings (for example reducers, tees, factory-made elbows, flanges, dome ends, welding stubs, and

mechanical joints)
3.2.3
point of delivery
point where the gas is transferred to the user

Note 1 to entry: This can be at a means of isolation or at the meter outlet connection and is normally at the

point of transfer of ownership.
3.2.4
user

person responsible for the safety of the gas installation and associated risks on a site

Note 1 to entry: Normally the user will be the site occupier or owner. It should be assumed that every user has a

responsibility for work performed on their site, whether or not the work is performed directly for the user or not.

This does not mean that they cannot take advice from an independent specialist.
3.2.5
installation pipework

pipework including components and stations downstream of the point of delivery terminating at the

appliance inlet connection
Note 1 to entry: This pipework is normally the property of the customer.
3.2.6
ventilated space
space where the air is continuously changed by natural or mechanical means
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3.2.7
duct
space specifically designed and constructed for the passage of building services

EXAMPLE Building services include gas pipework, water systems, power and telecommunication cables

3.2.8
ventilation duct

duct forming part of the structure of the building and intended exclusively for ventilation purposes

3.3 Definitions relating to means of isolation
3.3.1
means of isolation
device that is intended to interrupt the gas flow in pipework
EXAMPLE a manually operable valve
3.4 Definitions relating to components
3.4.1
regulator

device which reduces the gas pressure to a set value and maintains it within prescribed limits

3.4.2
insulating joint
fitting installed to insulate electrically one section of pipework from another
3.4.3
sleeve
protective pipe through which a gas pipe passes
3.4.4
vent pipe

pipework connected to a safety or control device to release gas at a safe location

3.4.5
creep relief valve

device designed to release a limited flow of gas in the event of an unacceptable pressure being detected

within the system it protects
3.4.6
instrumentation pipework

pipework required for the proper functioning of the ancillaries installed within the pressure regulating

installation
EXAMPLES Sensing, measuring, auxiliary and sampling lines
3.5 Definitions relating to tests
3.5.1
strength test

specific procedure intended to verify that the pipework meets the requirements for mechanical

strength
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3.5.2
tightness test

specific procedure intended to verify that the pipework meets the requirements for tightness

3.5.3
leak detection fluid

specially formulated fluid and foaming product that gives a clear indication that a leak exists when

applied to an element of pipework
3.6 Definitions relating to commissioning, operation and maintenance
3.6.1
admission of gas

operation of replacing the air or inert gas contained in pipework with distributed gas

3.6.2
purging from gas
operation of replacing the distributed gas in pipework with air or inert gas
3.6.3
purging

process for safety removing air or inert gas from pipework and/or pipeline components and replacing it

with gas, or the reverse process
3.6.3.1
direct purging
displacement of air by gas or vice versa;
3.6.3.2
indirect purging

displacement of air by inert gas followed by the displacement by gas or vice versa: alternatively by

means of a barrier (a slug of inert gas or a pig) between the air and the gas or vice versa

3.6.4
commissioning

activities required to fill and to pressurise pipework, stations, equipment and assemblies with gas and

to put them into operation
3.6.5
decommissioning

activities required to take out of service any pipework, stations, equipment and assemblies filled with

gas and to disconnect them from the rest of the system
3.6.6
competent person

person who is trained, experienced and approved to perform activities relating to gas pipework

Note 1 to entry: Means of approval are determined within each country.
3.6.7
hot tapping

procedure involving the safe use of heat, e.g. welding or fusion, to affix an attachment to a section of

pipework containing gas at pressure
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3.6.8
hot work
work that can provide an ignition source
3.7 Definitions relating to pressure regulating and metering
3.7.1
gas pressure control and metering system

system comprising all equipment, together with inlet and outlet piping up to and including the isolating

valves, which together performs the functions of pressure regulation, pressure safety and/or

quantitative gas measurement, whether or not including pressure boosting and/or gas mixing facilities

4 General
4.1 Installation drawings and technical file

Any change to the installation pipework shall be recorded in the technical file and on the installation

drawings required in prEN 15001-1.

Special attention shall be given to ensure that, after completion of commissioning, the technical file is

correctly updated to record any changes made in respect of the following:
1) diagram of the installation pipework and pressure regulation installations;

2) details of design standards used, evidence of testing of materials and components along with any

Certificates issued by the test bodies/manufacturers;
3) maximum allowable pressures and temperatures, maximum and minimum;
4) flow rates and discharge capacities;
5) function and duty of protective controls;
6) corrosion allowances;
7) material wall thickness of pipes;
8) materials specified;
9) welding standards and test procedures;
10) commissioning procedure;
11) testing and re-testing procedures;
12) purging procedures or methodology;
13) setting of pressure regulators and safety devices;

14) operating manual including decommissioning and maintenance procedures including in-service

inspections;
15) changes made during the commissioning procedure.
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oSIST prEN 15001-2:2017
prEN 15001-2:2017 (E)
4.2 Changes affecting an existing installation

Alterations or modifications to the installation including electrical equipment that changes its original

characteristics, purpose and/or type, shall be carried out in accordance with prEN 15001-1.

4.3 Quality system
The life of a gas installation can be divided into four phases:
— design (see prEN 15001-1);
— construction and testing (see prEN 15001-1);
— commissioning, as covered in this standard;
— operation and maintenance, as covered in this standard.

A quality system shall be applied to the operation and maintenance activities in accordance with this

European Standard.
Reference may be made to EN ISO 9000 or to equivalent quality systems.

After the gas installation has been commissioned, a precisely defined programme of operation,

maintenance and condition monitoring should maintain the integrity of the pipework.

4.4 Protection against hazards
4.4.1 Electrical installation in hazardous area

When an area has been classified as hazardous (see EN 60079-10) subsequent electrical installations

shall comply wit
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