FprEN 15001-1

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

This European Standard specifies detailed functional requirements for the design, selection of materials, construction, inspection and testing of:
-   industrial gas installation pipework and assemblies with an operating pressure greater than 0,5 bar; and
-   non-industrial gas installation pipework (residential and commercial) with an operating pressure greater than 5 bar in buildings;
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 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 (all parts) 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 in buildings, EN 1775 applies.
For gas installations that do not fall within the scope of EN 1775 or other European Standards, this 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 (normal conditions). 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 LPG;
-   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 in the liquid state (e.g. between the storage vessel and any pressure regulator).
In this standard, all pressures are gauge pressures unless otherwise stated.
This standard has been harmonized to address the essential safety requirements of the Pressure Equipment Directive (PED, 2014/68/EU [formerly 97/23/EC]) relevant for the joining of gas installation pipework (assemblies) falling within the scope of the PED. These are listed in Annex ZA. However, "this Directive does not cover the assembly of pressure equipment on the site and under the responsibility of the user, as in the case of industrial installations" (PED, Preamble, 7th recital, last paragraph).
Although in this respect, the standard takes into account the essential safety requirements of the PED, no inference can be drawn from this as to whether or not the installation or parts of the installation falls within the scope of the PED. Reference should therefore be made to the PED and relevant national legislation.
This European Standard specifies common basic principles for gas supply systems. Users of this European Standard should be aware (...)

Gasinfrastruktur - Gas-Leitungsanlagen mit einem Betriebsdruck größer 0,5 bar für industrielle Installationen und größer 5 bar für industrielle und nicht-industrielle Installationen - Teil 1: Detaillierte funktionale Anforderungen an Planung, Material, Bau, Inspektion und Prüfung

Diese Europäische Norm legt detailliert die funktionalen Anforderungen hinsichtlich der Planung und Werkstoffauswahl sowie des Baus, der Inspektion und der Prüfung von:
-   industriellen Gasleitungsanlagen und Baugruppen mit einem Betriebsdruck größer 0,5 bar; und
-   nicht-industriellen Gasleitungsanlagen in Gebäuden (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. Diese Norm gilt auch für die Rohrleitungen zum Eingangsanschluss der Gasgeräte, die nicht in den Anwendungsbereich der Gasgerätenorm fallen.
ANMERKUNG 1   Der Gebrauch der Begriffe "Anlage" (en: installation) und "Rohrleitungen" (en: pipework) ist austauschbar.
Abgesehen von den nachstehend angegebenen Ausnahmen gilt diese Norm für den Betrieb von Gasleitungsanlagen bei Umgebungstemperaturen zwischen −20 °C und 40 °C mit Betriebsdrücken bis einschließlich 60 bar. Bei Betriebszuständen außerhalb dieser Grenzen sollte zusätzlich auf EN 13480 (alle Teile) für metallische Rohrleitungen Bezug genommen werden.
Für industrielle Gasleitungsanlagen mit Betriebsdrücken bis einschließlich 0,5 bar und für nicht-industrielle Gasleitungsanlagen in Gebäuden (Haushalten und Gewerbebetrieben) mit Betriebsdrücken bis einschließlich 5 bar gilt EN 1775.
Diese Norm gilt für Gasleitungsanlagen, die nicht in den Anwendungsbereich der EN 1775 oder anderer Europäischer Normen fallen.
In dieser Europäischen Norm bezeichnet der Begriff „Gas“ brennbare Gase, die bei einer Temperatur von 15 °C und einem absoluten atmosphärischen Druck von 1 013 mbar (Normalzustand) in gasförmigem Zustand vorliegen. Diese Gase werden im Allgemeinen als erzeugtes Gas, Erdgas oder Flüssiggas (LPG) bezeichnet. Sie werden auch als Gase der ersten, zweiten oder dritten Gasfamilie entsprechend der Klassifizierung nach EN 437:2003+A1:2009, Tabelle 1, bezeichnet. Die angegebenen Werte beziehen sich auf den "Normalzustand" für alle in dieser Norm angegebenen Volumina.
Diese Europäische Norm gilt für Rohrleitungsanlagen für den Transport von:
-   aufbereitetem, ungiftigem und nicht korrosivem Erdgas nach EN 437:2003+A1:2009 und EN 16726 "Gasinfrastruktur - Beschaffenheit von Gas - Gruppe H";
-   verdampftem LPG;
-   Biomethan nach EN 16723 1;
-   verdampftem LNG.
ANMERKUNG 2   Die Spezifikation von verdampftem LNG gleicht der von Erdgas entsprechend der Klassifizierung nach EN 437:2003+A1:2009.
Diese Europäische Norm gilt nicht für Rohrleitungen für Gase mit hohem Wasserstoffanteil, die nicht den Definitionen nach EN 437:2003+A1:2009 entsprechen.
Hiervon ausgenommen sind Flüssiggasbehälter (einschließlich aller unmittelbar an den Behältern angebrachten Geräte). Ebenfalls ausgenommen sind Flüssiggasanlagen und Abschnitte von Flüssig-gasanlagen, die in flüssigem Zustand unter Dampfdruck betrieben werden (z. B. zwischen dem Behälter und einem Druckregelgerät).
Sofern nicht anders angegeben, handelt es sich bei allen in diesem Dokument verwendeten Drücken um Überdrücke.
Diese Norm wurde im Hinblick auf die grundlegenden Sicherheitsanforderungen an das Verbinden von Gasleitungsanlagen (Baugruppen), die in den Anwendungsbereich der PED fallen, an die Druckgeräte-richtlinie (PED, 2014/68/EU [zuvor PED, 97/23/EG]) angepasst. Diese Anforderungen sind in Anhang ZA aufgeführt. Allerdings gilt diese Richtlinie "nicht für den Zusammenbau von Druckgeräten..., der " beispielsweise in Industrieanlagen " auf dem Gelände und unter der Verantwortung eines Anwenders erfolgt." (PED, Präambel, 7. Aufzählung, letzter Absatz).
Diese Norm berücksichtigt in diesem Zusammenhang zwar die grundlegenden Sicherheitsanforderungen der PED, allerdings kann sich daraus nicht ableiten lassen, ob eine Anlage ganz oder teilweise in den Anwendungsbereich der PED fällt. (...)

Infrastructures gazières - Canalisations d’installations 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 (domestiques et commerciales) - Partie 1 : Exigences fonctionnelles détaillées relatives à la conception, aux matériaux, à la construction, à l'inspection et aux essais

Cette Norme européenne spécifie les exigences fonctionnelles détaillées relatives à la conception, au choix des matériaux, à la construction, à l’inspection et aux essais :
-   d’installations et d'ensembles industriels de gaz avec une pression de service supérieure à 0,5 bar ; et
-   d’installations de gaz non industrielles (résidentielles et commerciales) avec une pression de service supérieure à 5 bar dans les bâtiments ;
allant du point de livraison de l'exploitant du réseau de distribution de gaz jusqu'au raccordement d'entrée de l'appareil à gaz, ce dernier étant habituellement le robinet d'isolement d'entrée. La présente norme est aussi applicable à la tuyauterie du raccordement d’un appareil à gaz qui ne fait pas partie du domaine d'application de la norme de l'appareil.
NOTE 1   Les termes installation et tuyauterie sont interchangeables.
Outre les exceptions énoncées ci-après, la présente norme est applicable aux installations de gaz exploitées 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 de service en dehors de ces limites, il convient de se référer à l’EN 13480 (toutes les parties) dans le cas d’une canalisation métallique.
Pour les installations de gaz industrielles dont la pression de service est inférieure ou égale à 0,5 bar et pour les installations de gaz non industrielles (domestiques et commerciales) dont la pression de service est inférieure ou égale à 5 bar dans des bâtiments, c'est l’EN 1775 qui s’applique.
Pour les installations industrielles de gaz non visées par l’EN 1775 ni par d'autres Normes européennes, cette norme s’applique.
Dans la présente Norme européenne, le terme « gaz » est applicable à des gaz combustibles, qui sont gazeux à 15 °C et à 1 013 mbar de pression atmosphérique absolue (conditions normales). Ces gaz sont couramment appelés gaz manufacturé, gaz naturel ou gaz de pétrole liquéfiés (GPL). Ils sont aussi dénommés respectivement gaz de la 1ère, 2e et 3e famille 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 » ;
-   GPL 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 de stockage) 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 à l’état liquide (par exemple entre le réservoir de stockage et chaque régulateur de pression).
Dans cette norme, toutes les pressions sont, sauf indication contraire, des pressions relatives.
Cette norme a été harmonisée pour satisfaire aux exigences essentielles de la Directive relative aux équipements sous pression (DESP, 2014/68/UE [anciennement 97/23/CE]) en matière de raccordement de canalisations d'installations de gaz (ensembles) qui entrent dans le domaine d'application de la DESP. Ces exigences sont listées en Annexe ZA. Cependant, « cette Directive ne couvre pas l’assemblage d’équipements sous pression effectué sur le site de l’usager, sous la responsabilité de celui-ci, telles que des installations industrielles » (...)

Infrastruktura za plin - Plinske napeljave z delovnim tlakom nad 0,5 bar za industrijsko uporabo in delovnim tlakom nad 5 bar za industrijsko in neindustrijsko uporabo - 1. del: Podrobne funkcionalne zahteve za načrtovanje, materiale, gradnjo, nadzor in preskušanje

General Information

• Status: Not Published
• Publication Date: 30-May-2023
• ICS: 23.040.01 - Pipeline components and pipelines in general
• ICS: 91.140.40 - Gas supply systems
• Technical Committee: CEN/TC 234 - Gas infrastructure
• Drafting Committee: CEN/TC 234/WG 8 - Industrial piping
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 09-Oct-2022
• Due Date: 04-Jun-2019
• Completion Date: 09-Oct-2022
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: kSIST FprEN 15001-1:2022 - 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

Relations

• Revises: EN 15001-1:2009 - 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
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 15001-1:2017
01-julij-2017
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LQGXVWULMVNRXSRUDERLQGHORYQLPWODNRPQDGEDU]DLQGXVWULMVNRLQ
QHLQGXVWULMVNRXSRUDERGHO3RGUREQHIXQNFLRQDOQH]DKWHYH]DQDþUWRYDQMH
PDWHULDOHJUDGQMRQDG]RULQSUHVNXãDQMH

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

Gasinfrastruktur - Gas-Leitungsanlagen mit einem Betriebsdruck größer 0,5 bar für

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

Installationen - Teil 1: Detaillierte funktionale Anforderungen an Planung, Material, Bau,

Inspektion und Prüfung;

Infrastructures gazières - Canalisations d’installations de gas avec une pression de

service supérieure à 5 bar pour les installations industrielles et non industrielles

(domestiques et commerciales) - Partie 1: Exigences fonctionelles d’taillées relative à la

conception, au matériaux, à la construction, à l’inspection et au essais
Ta slovenski standard je istoveten z: prEN 15001-1
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
oSIST prEN 15001-1:2017 en,fr,de

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

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oSIST prEN 15001-1:2017
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oSIST prEN 15001-1:2017
DRAFT
EUROPEAN STANDARD
prEN 15001-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2017
ICS 23.040.01; 91.140.40 Will supersede EN 15001-1:2009
English Version
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

Infrastructures gazières - Canalisations d'installations Gasinfrastruktur - Gas-Leitungsanlagen mit einem

de gas avec une pression de service supérieure à 5 bar Betriebsdruck größer 0,5 bar für industrielle

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

(domestiques et commerciales) - Partie 1: Exigences nicht-industrielle Installationen - Teil 1: Detaillierte

fonctionelles d'taillées relative à la conception, au funktionale Anforderungen an Planung, Material, Bau,

matériaux, à la construction, à l'inspection et au essais Inspektion und Prüfung

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 NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
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 15001-1:2017 E

worldwide for CEN national Members.
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oSIST prEN 15001-1:2017
prEN 15001-1:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 7

1 Scope .................................................................................................................................................................... 8

2 Normative references .................................................................................................................................... 9

3 Terms and definitions ................................................................................................................................ 15

3.1 Definitions relating to pressure .............................................................................................................. 15

3.2 Definitions relating to the gas installation ......................................................................................... 16

3.3 Definition relating to means of isolation ............................................................................................. 17

3.4 Definitions relating to jointing methods ............................................................................................. 17

3.5 Definitions relating to components ....................................................................................................... 18

3.6 Definitions relating to tests ...................................................................................................................... 19

3.7 Definition relating to testing and inspection ..................................................................................... 20

3.8 Definitions relating to assembly processes for metallic materials ............................................ 20

3.9 Definitions relating to pressure regulating and metering ............................................................ 20

4 General ............................................................................................................................................................. 21

4.1 Quality system ............................................................................................................................................... 21

4.2 Selection of materials ................................................................................................................................. 21

4.2.1 Specification of materials and components ........................................................................................ 21

4.2.2 Compliance with EU Directive 2014/68/EU ....................................................................................... 21

4.2.3 Certification of materials and components ........................................................................................ 21

4.2.4 CE marking...................................................................................................................................................... 22

4.3 Protection against hazards ....................................................................................................................... 22

4.3.1 Resistance to fire .......................................................................................................................................... 22

4.3.2 Resistance to corrosive substances and atmosphere ..................................................................... 22

4.3.3 Protection against variations in the operating pressure ............................................................... 22

4.3.4 Protection against gas hazards ............................................................................................................... 22

4.3.5 Electrical installation .................................................................................................................................. 23

4.4 Accommodation and location of gas pressure regulating and metering systems, gas

pressure compressors and gas mixing systems ................................................................................ 23

4.4.1 Requirements for the enclosure of installations .............................................................................. 23

4.4.2 Installation in an appliance room .......................................................................................................... 23

4.4.3 Protection against adverse influences ................................................................................................. 23

5 Materials .......................................................................................................................................................... 24

5.1 Standards and specifications for pipes and pipe fittings ............................................................... 24

5.1.1 General ............................................................................................................................................................. 24

5.1.2 Carbon steel pipes ........................................................................................................................................ 24

5.1.3 Carbon steel and iron fittings .................................................................................................................. 25

5.1.4 Stainless steel pipes and pipe fittings (including flanges and valves) ...................................... 26

5.1.5 Copper .............................................................................................................................................................. 27

5.1.6 Polyethylene .................................................................................................................................................. 27

5.1.7 Ancillaries ....................................................................................................................................................... 27

5.1.8 Valves................................................................................................................................................................ 28

6 Design of pipework ...................................................................................................................................... 29

6.1 General ............................................................................................................................................................. 29

6.1.1 Installation drawings and technical file............................................................................................... 29

6.1.2 Measuring and test instruments ............................................................................................................. 29

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6.1.3 Properties of gas ........................................................................................................................................... 30

6.2 Layout ............................................................................................................................................................... 30

6.2.1 Limits of the pipework location .............................................................................................................. 30

6.2.2 Above-ground pipework ............................................................................................................................ 30

6.2.3 Buried pipework ........................................................................................................................................... 30

6.2.4 Distance between buried pipework and buildings .......................................................................... 30

6.2.5 Unacceptable locations for gas pipework in buildings ................................................................... 30

6.3 Dimensioning ................................................................................................................................................. 31

6.3.1 Pressure loss .................................................................................................................................................. 31

6.3.2 Gas velocity ..................................................................................................................................................... 31

6.4 Pressure and wall thickness ..................................................................................................................... 31

6.4.1 PS and test pressure .................................................................................................................................... 31

6.4.2 Pipe wall thickness....................................................................................................................................... 31

6.5 Safety engineering ........................................................................................................................................ 38

6.5.1 Principles of pipework ............................................................................................................................... 38

6.5.2 Isolation of the gas supply ......................................................................................................................... 38

6.5.3 Location of pipework .................................................................................................................................. 41

6.5.4 Supporting structures ................................................................................................................................. 41

6.5.5 Depressurising and purging ..................................................................................................................... 41

6.6 Detail engineering ........................................................................................................................................ 41

6.6.1 Pipe transits .................................................................................................................................................... 41

6.6.2 Branches in steel pipes ............................................................................................................................... 41

6.6.3 Off-take connections made of straight pipes for PS ≤ 16 bar ........................................................ 45

6.6.4 Joints.................................................................................................................................................................. 46

6.6.5 Ancillaries ....................................................................................................................................................... 47

6.6.6 Above ground pipework inside and outside buildings ................................................................... 48

6.6.7 Buried pipework ........................................................................................................................................... 51

6.6.8 Wall thickness related to bending of steel pipes ............................................................................... 53

6.6.9 Provision for expansion and flexibility ................................................................................................ 54

6.7 Hot tapping carbon steel pipe .................................................................................................................. 54

6.7.1 General ............................................................................................................................................................. 54

6.7.2 Principles ......................................................................................................................................................... 54

6.7.3 Conditions ....................................................................................................................................................... 54

6.7.4 Design evaluation ......................................................................................................................................... 55

7 Design of pressure control systems ....................................................................................................... 55

7.1 General ............................................................................................................................................................. 55

7.2 Pressure regulating system ...................................................................................................................... 55

7.3 Instrumentation ............................................................................................................................................ 56

7.4 Permanent bypasses .................................................................................................................................... 56

7.4.1 Bypasses for equalization or testing...................................................................................................... 56

7.4.2 Bypasses of the safety system .................................................................................................................. 56

7.5 Construction requirements ...................................................................................................................... 56

7.5.1 Pressure resistance...................................................................................................................................... 56

7.5.2 Operation ......................................................................................................................................................... 56

7.5.3 Insulating joint/flange ................................................................................................................................ 56

7.5.4 Gas velocity ..................................................................................................................................................... 57

7.5.5 External sensing lines ................................................................................................................................. 57

7.5.6 Breather and vent pipes ............................................................................................................................. 57

7.5.7 Isolating valves .............................................................................................................................................. 58

7.5.8 Filter, separators .......................................................................................................................................... 58

7.5.9 Pressure gauges ............................................................................................................................................ 58

7.5.10 Pressure tappings and purge connections .......................................................................................... 58

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7.6 Low gas temperature .................................................................................................................................. 59

7.6.1 Functional requirements........................................................................................................................... 59

7.6.2 Design temperature effects ...................................................................................................................... 59

7.6.3 Condensation ................................................................................................................................................. 59

7.7 Gas compressors ........................................................................................................................................... 59

7.7.1 Construction ................................................................................................................................................... 59

7.7.2 Temperature rise ......................................................................................................................................... 59

7.7.3 Pressure variation ....................................................................................................................................... 59

7.8 Safety systems ............................................................................................................................................... 59

7.8.1 Pressure safety system ............................................................................................................................... 59

7.8.2 Pressure warning system .......................................................................................................................... 62

7.8.3 Gas pressure compressors ........................................................................................................................ 62

7.8.4 Gas mixing systems ...................................................................................................................................... 63

8 Construction ................................................................................................................................................... 63

8.1 Identification of the installation ............................................................................................................. 63

8.1.1 Installation drawings .................................................................................................................................. 63

8.1.2 Identification of the components ........................................................................................................... 63

8.1.3 Weld identification ...................................................................................................................................... 63

8.2 External hazards ........................................................................................................................................... 64

8.2.1 Mechanical loads .......................................................................................................................................... 64

8.2.2 Electric currents ........................................................................................................................................... 64

8.2.3 Environmental influences ......................................................................................................................... 64

8.3 Gas pipework passing through exterior walls ................................................................................... 64

8.3.1 Buried pipe transits .................................................................................................................................... 64

8.3.2 Aboveground pipe transits ....................................................................................................................... 66

8.4 Identification of pipework ........................................................................................................................ 67

8.4.1 Identification of above-ground pipework ........................................................................................... 67

8.4.2 Identification of buried pipework.......................................................................................................... 67

8.5 Specifications and requirements for joints ........................................................................................ 67

8.5.1 Welded joints and pipe fittings in carbon steel and stainless steel pipes ............................... 67

8.5.2 Joints in copper pipework ......................................................................................................................... 71

8.5.3 Fusion joints in plastic pipes .................................................................................................................... 72

8.5.4 Flange joints ................................................................................................................................................... 72

8.5.5 Compression joints ...................................................................................................................................... 72

8.5.6 Threaded joints ............................................................................................................................................. 72

8.6 Joint suitability .............................................................................................................................................. 72

8.7 Connections .................................................................................................................................................... 73

8.7.1 Connection points/pipe ends ................................................................................................................... 73

8.7.2 Appliance isolating valves......................................................................................................................... 73

8.8 Corrosion protection................................................................................................................................... 73

8.8.1 Metal-to-metal contact ............................................................................................................................... 73

8.8.2 Above-ground protection of pipework ................................................................................................. 74

8.8.3 Protection of buried pipework ................................................................................................................ 76

8.8.4 Corrosion at pipe supports ....................................................................................................................... 79

8.9 Handling and installation of pipework ................................................................................................ 80

8.9.1 PE pipework ................................................................................................................................................... 80

8.9.2 Steel pipework .............................................................................................................................................. 80

8.9.3 Copper pipework .......................................................................................................................................... 81

8.9.4 Pipe trench filling ......................................................................................................................................... 81

8.10 Bending of pipes ........................................................................................................................................... 82

8.10.1 Steel pipe bending ........................................................................................................................................ 82

8.10.2 PE pipe bending ............................................................................................................................................ 82

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oSIST prEN 15001-1:2017
prEN 15001-1:2017 (E)

8.10.3 Copper pipe bending ................................................................................................................................... 82

8.11 Welding of supports and anchor points to carbon steel pipework ............................................ 83

8.12 Installation of pressure regulating systems ....................................................................................... 84

8.12.1 Protection of the installation space ....................................................................................................... 84

8.12.2 Construction requirements ...................................................................................................................... 85

9 Documentation, inspection and testing ................................................................................................ 85

9.1 General ............................................................................................................................................................. 85

9.2 Documentation .............................................................................................................................................. 86

9.2.1 General ............................................................................................................................................................. 86

9.2.2 Technical file ......................................................................................................................

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