Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 3: Specific functional requirements for steel

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 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 specifies common basic principles for gas infrastructure. Users of this 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.

Gasinfrastruktur - Rohrleitungen mit einem maximal zulässigen Betriebsdruck bis einschließlich 16 bar - Teil 3: Besondere funktionale Anforderungen für Stahl

Diese Europäische Norm beschreibt die besonderen funktionalen Anforderungen für Stahlrohrleitungen in Ergänzung zu den allgemeinen funktionalen Anforderungen von EN 12007-1 für maximal zulässige Betriebsdrücke bis einschließlich 16 bar.
Diese Europäische Norm legt allgemeine Grundsätze für die Gasinfrastruktur fest. Anwender dieser Norm sollten sich dessen bewusst sein, dass in den CEN-Mitgliedsländern detailliertere nationale Normen und/oder Arbeitsblätter existieren können.
Diese Europäische Norm sollte in Verbindung mit den nationalen Normen und/oder Arbeitsblättern ange-wendet werden, in denen die oben erwähnten allgemeinen Grundsätze ausführlich dargelegt werden.
Falls in nationalen Rechtsvorschriften/Verordnungen restriktivere, den Anforderungen der vorliegenden Norm entgegenstehende Anforderungen enthalten sind, müssen vorrangig die nationalen Rechtsvorschriften/ Verordnungen, wie in CEN/TR 13737 (alle Teile) dargelegt, erfüllt werden.
In CEN/TR 13737 (alle Teile) werden angegeben:
-   Abklärung aller nationaler Rechtsvorschriften/Verordnungen, die in einem Mitgliedstaat anwendbar sind;
-   stärker einschränkende nationale Anforderungen, falls zutreffend;
-   eine nationale Anlaufstelle für die neuesten Informationen.

Infrastructures gazières - Canalisations pour pression maximale de service inférieure ou égale à 16 bar - Partie 3: Exigences fonctionnelles spécifiques pour l'acier

La présente Norme européenne décrit, en complément des exigences fonctionnelles générales de l’EN 12007-1, les exigences fonctionnelles spécifiques applicables aux canalisations en acier pour les pressions maximales de service inférieures ou égales à 16 bar. La présente Norme européenne spécifie les principes de base communs pour les systèmes d’alimentation en gaz. Il convient que les utilisateurs de la présente Norme européenne gardent à l'esprit l'existence éventuelle, dans les États membres du CEN, de codes de pratique et/ou de normes nationales plus détaillés.
La présente Norme européenne spécifie les principes de base communs pour les infrastructures gazières. Il convient que les utilisateurs de la présente norme gardent à l'esprit l'existence éventuelle, dans les pays membres du CEN, de codes de pratique et/ou de normes nationales plus détaillées.
La présente Norme européenne est destinée à s'appliquer conjointement à ces normes nationales et/ou codes de pratique, qui détaillent les principes de base précités.
En cas de conflits entre des exigences plus restrictives dans la réglementations/législation nationale et les exigences de cette Norme européenne, la réglementation/législation nationale l’emporte, comme illustré dans le CEN/TR 13737 (toutes parties).
Le CEN/TR 13737 (toutes parties) donne :
-   la clarification de toutes les législations/règlements applicables dans un état membre ;
-   le cas échéant, des exigences nationales plus restrictives ;
-   un point de contact national pour une information ultérieure.

Infrastruktura za plin - Cevovodni sistemi za najvišji delovni tlak do vključno 16 bar - 3. del: Posebne funkcionalne zahteve za jekla

General Information

Status
Published
Public Enquiry End Date
30-Jun-2013
Publication Date
08-Jun-2015
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-May-2015
Due Date
27-Jul-2015
Completion Date
09-Jun-2015

RELATIONS

Buy Standard

Standard
SIST EN 12007-3:2015 - natisnjeno za čitalnico
English language
23 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gasinfrastruktur - Rohrleitungen mit einem maximal zulässigen Betriebsdruck bis einschließlich 16 bar - Teil 3: Besondere funktionale Anforderungen für StahlInfrastructures gazières - Canalisations pour pression maximale de service inférieure ou égale à 16 bar - Partie 3: Exigences fonctionnelles spécifiques pour l'acierGas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 3: Specific functional requirements for steel91.140.40Sistemi za oskrbo s plinomGas supply systems77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific useICS:Ta slovenski standard je istoveten z:EN 12007-3:2015SIST EN 12007-3:2015en,fr,de01-julij-2015SIST EN 12007-3:2015SLOVENSKI

STANDARDSIST EN 12007-3:20001DGRPHãþD
SIST EN 12007-3:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12007-3
May 2015 ICS 23.040.10 Supersedes EN 12007-3:2000English Version

Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 3: Specific functional requirements for steel

Infrastructures gazières - Canalisations pour pression maximale de service inférieure ou égale à 16 bar - Partie 3: Exigences fonctionnelles spécifiques pour l'acier

Gasinfrastruktur - Rohrleitungen mit einem maximal zulässigen Betriebsdruck bis einschließlich 16 bar - Teil 3: Besondere funktionale Anforderungen für Stahl This European Standard was approved by CEN on 12 March 2015.

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. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12007-3:2015 ESIST EN 12007-3:2015

EN 12007-3:2015 (E) 2 Contents Page Foreword ..............................................................................................................................................................4 1 Scope ......................................................................................................................................................5 2 Normative references ............................................................................................................................5 3 Terms and definitions ...........................................................................................................................7 4 Design .....................................................................................................................................................7 4.1 General requirements for selection of steel materials.......................................................................7 4.1.1 General ....................................................................................................................................................7 4.1.2 Quality level ............................................................................................................................................8 4.1.3 Weldability ..............................................................................................................................................8 4.1.4 Impact energy .........................................................................................................................................9 4.1.5 Inspection documents for components ..............................................................................................9 4.2 Pipes and fittings ...................................................................................................................................9 4.2.1 Steel pipes ..............................................................................................................................................9 4.2.2 Fittings ................................................................................................................................................. 10 4.3 Insulating joints .................................................................................................................................. 10 4.3.1 Type test .............................................................................................................................................. 10 4.3.2 Strength test ........................................................................................................................................ 10 4.3.3 Tightness test ...................................................................................................................................... 11 4.3.4 Electrical test ....................................................................................................................................... 11 4.3.5 Inspection documents ........................................................................................................................ 11 4.4 Valves ................................................................................................................................................... 11 4.5 Corrosion protection .......................................................................................................................... 11 4.5.1 General ................................................................................................................................................. 11 4.5.2 Passive corrosion protection ............................................................................................................ 11 4.5.3 Active corrosion protection ............................................................................................................... 12 4.6 Jointing methods ................................................................................................................................ 12 4.6.1 Welding joints ..................................................................................................................................... 12 4.6.2 Flanged joints ...................................................................................................................................... 12 4.6.3 Threaded joints ................................................................................................................................... 12 4.6.4 Compression joints ............................................................................................................................ 12 5 Construction ........................................................................................................................................ 13 5.1 Handling, transportation and storage............................................................................................... 13 5.2 Laying .................................................................................................................................................. 13 5.2.1 General ................................................................................................................................................. 13 5.2.2 Pipe stringing ...................................................................................................................................... 13 5.2.3 Deflection ............................................................................................................................................. 13 5.2.4 Connections to other plant ................................................................................................................ 14 5.2.5 Valves ................................................................................................................................................... 14 5.2.6 Boring, jacking and impact moling ................................................................................................... 14 5.3 Construction records ......................................................................................................................... 14 6 Coating inspection.............................................................................................................................. 15 7 Pressure testing .................................................................................................................................. 15 Annex A (informative)

Handling, transportation and storage ...................................................................... 16 A.1 Safety ................................................................................................................................................... 16 A.2 Handling ............................................................................................................................................... 16 SIST EN 12007-3:2015

EN 12007-3:2015 (E) 3 A.3 Transportation ..................................................................................................................................... 17 A.4 Storage ................................................................................................................................................. 17 Annex B (informative)

Deflection of pipes ...................................................................................................... 19 Annex C (informative)

Calculation of wall thickness .................................................................................... 20 Annex D (informative)

Significant technical changes between this European Standard and the previous edition ................................................................................................................................... 21 Bibliography ...................................................................................................................................................... 23

SIST EN 12007-3:2015

EN 12007-3:2015 (E) 4 Foreword This document (EN 12007-3:2015) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2015, and conflicting national standards shall be withdrawn at the latest by November 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12007-3:2000. Annex D provides details of significant technical changes between this European Standard and the previous edition. There is a complete suite of functional standards prepared by CEN/TC 234 "Gas infrastructure" to cover all parts 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 infrastructure by the user has been assumed. Gas infrastructure is complex and the importance on safety of its 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. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12007-3:2015

EN 12007-3:2015 (E) 5 1 Scope 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. 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 1092-1, Flanges and their joints

Circular flanges for pipes, valves, fittings and accessories, PN designated
Part 1: Steel flanges EN 1514-1, Flanges and their joints
Dimensions of gaskets for PN-designated flanges

Part 1: Non-metallic flat gaskets with or without inserts EN 1514-2, Flanges and their joints

Gaskets for PN-designated flanges

Part 2: Spiral wound gaskets for use with steel flanges EN 1514-3, Flanges and their joints

Dimensions of gaskets for PN-designated flanges
Part 3: Non-metallic PTFE envelope gaskets EN 1514-4, Flanges and their joints
Dimensions of gaskets for PN-designated flanges

Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges EN 1515-1, Flanges and their joints

Bolting
Part 1: Selection of bolting EN 1515-2, Flanges and their joints
Bolting

Part 2: Classification of bolt materials for steel flanges, PN designated EN 1591-1, Flanges and their joints

Design rules for gasketed circular flange connections
Part 1: Calculation EN 1591-2, Flanges and their joints
Design rules for gasketed circular flange connections
Part 2: Gasket parameters SIST EN 12007-3:2015
EN 12007-3:2015 (E) 6 EN 1594, Gas infrastructure
Pipelines for maximum operating pressure over 16 bar
Functional requirements EN 1759-1, Flanges and their joint
Circular flanges for pipes, valves, fittings and accessories, Class designated
Part 1: Steel flanges, NPS 1/2 to 24 EN 10204, Metallic products

Types of inspection documents EN 10226-1, Pipe threads where pressure tight joints are made on the threads

Part 1: Taper external threads and parallel internal threads

Dimensions, tolerances and designation EN 10255, Non-Alloy steel tubes suitable for welding and threading Technical delivery conditions EN 12007-1, Gas infrastructure

Pipelines for maximum operating pressure up to and including 16 bar Part 1: General functional requirements EN 12327, Gas infrastructure

Pressure testing, commissioning and decommissioning procedures Functional requirements EN 12560-1, Flanges and their joints

Gaskets for Class-designated flanges

Part 1: Non-metallic flat gaskets with or without inserts EN 12560-2, Flanges and their joints

Dimensions of gaskets for Class-designated flanges

Part 2: Spiral wound gaskets for use with steel flanges EN 12560-3, Flanges and their joints

Gaskets for Class-designated flanges
Part 3: Non-metallic PTFE envelope gaskets EN 12560-4, Flanges and their joints
Gaskets for Class-designated flantes

Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges EN 12560-5, Flanges and their joints

Gaskets for Class-designated flanes

Part 5: Metallic ring joint gaskets for use with steel flanges EN 12732, Gas infrastructure

Welding steel pipework

Functional requirements EN 12954, Cathodic protection of buried or immersed metallic structures

General principles and application for pipelines EN 13509, Cathodic protection measurement techniques EN 13774, Valves for gas distribution systems with maximum operating pressure less than or equal to 16 bar

Performance requirements EN 15257, Cathodic protection

Competence levels and certification of cathodic protection personnel EN 50162, Protection against corrosion by stray current from direct current systems EN 15280, Evaluation of a.c. corrosion likelihood of buried pipelines applicable to cathodically protected pipelines EN ISO 3183, Petroleum and natural gas industries

Steel pipe for pipeline transportation systems (ISO 3183) SIST EN 12007-3:2015

EN 12007-3:2015 (E) 7 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12007-1 and the following apply. 3.1 compressor joint type of joint in which gas tightness is achieved by compression within a socket with or without a seal 3.2 threaded joint type of joint in which gas tightness is achieved by metal to metal contact within threads with the assistance of a sealant 3.3 flanged joint type of joint in which gas tightness is achieved by compression of a gasket between the faces of two flanges 3.4 insulating joint fitting installed to insulate electrically one section of pipeline from another 4 Design 4.1 General requirements for selection of steel materials 4.1.1 General Steel pipes and other pipeline components shall conform to the relevant European or International Standards. Steel pipe material shall comply with EN ISO 3183 or other suitable European Standards. Steel types or grades other than those listed in EN ISO 3183 may also be used when their suitability has been demonstrated. The requirements of EN ISO 3183 shall be used for guidance in establishing material properties. Table 1 gives informative examples of the range of the steel grades available. SIST EN 12007-3:2015

EN 12007-3:2015 (E) 8 Table 1 — Examples of the range of steel grades available MOP Standard Steel grade Supply condition Charpy

Kv J Minimum yield strength MPa ≤ 5 bar prEN 10255:2015 S235GT - - 235 ≤ 16 bar EN ISO 3183 L245 L290 L320 L360 PSL2 In all cases, either R/ N/ Q/ M as applicable 27J @ 0 °C 245 290 320 360 ≤ 16 bar

EN 10216-1
P235TR2 P265TR2 Either NP/ NW/ NR as applicable 27J @ 0 °C 235 265

≤ 16 bar EN 10217-1 P235TR2 P265TR2 Either NP/ NW/ NR as applicable 27J @ 0 °C 235 265

≤ 16 bar EN 10216-2
P235GH P265GH Either +N/ NP/ NW/ NR as applicable 27J @ 0 °C 235 265

≤ 16 bar EN 10217-2 P235GH P265GH Either +N/ NP/ NW/ NR as applicable 27J @ 0 °C 235 265 Key PSL

product specification level (see EN ISO 3183, 6.1.2) R
as rolled (see EN ISO 3183, 4.2 and Table 3) M
thermomechanically rolled or formed (see EN ISO 3183, 4.63, 4.64 and Table 3) N

full pipe normalized, normalized rolled or normalized formed (see EN 10216-2, Table 1) normalizing forming +N

full pipe normalized, normalized rolled or normalized formed (see EN 10216-2, Table 1) NP

pipe full body normalized (see EN 10217-1/ EN 10217-2, Table 1) NR

pipe normalized rolled or hot (stretch) reduced within the normalizing temperature range (see EN 10217-1/

EN 10217-2, Table 1) NW
pipe normalized only in weld zone (see EN 10217-1/ EN 10217-2, Table 1) Q

quenched and tempered (see EN ISO 3183, 4.5 and Table 3) 4.1.2 Quality level The quality level as defined by the relevant standards for other pipeline components shall be compatible with the quality level of the pipes. EXAMPLE For welding and jointing purposes. Steel pipes shall be qualified with respect to their strength, fracture toughness and weldability. 4.1.3 Weldability Pipes and other pipeline components shall be capable of being welded reliably under site conditions. To meet the weldability criteria, the value of the carbon equivalent value (CEV) of pipes and other pipeline components, based on the steel ladle analysis, shall be less than or equal to 0,45 for grades with specified SIST EN 12007-3:2015

EN 12007-3:2015 (E) 9 minimum yield strength (SMYS) not exceeding 360 Mpa, unless otherwise agreed between the pipeline operator and manufacturer. This value shall be guaranteed by the manufacturer. For all grades of steel, the maximum carbon content shall not exceed 0,22 % and the maximum guaranteed values of sulphur and phosphorus contents shall not exceed 0,035 % for each element or 0,05 % in total on the ladle analysis. NOTE 1 Carbon equivalent is given by the formula: 0,456515MnCrMoVCuNiCEC+++=+++≤ where CE is the carbon equivalent; C is the weight percentage of carbon content; Mn is the weight percentage of manganese content; Cr is the weight percentage of chromium content; Mo is the weight percentage of molybdenum content; V is the weight percentage of vanadium content; Cu is the weight percentage of copper content; Ni is the weight percentage of nickel content. NOTE 2 This CEV formula as shown in Note 1 is appropriate for welding steel pipe of SMYS smaller or equal than 360 MPa for pressures up to and including 16 bar. Other CEV formulae suitable for higher strength steels may be used at the discretion of the asset owner. If in exceptional cases grades of steel are used which do not fulfil these requirements, the manufacturer shall give detailed data concerning the weldability of the material. The pipeline operator may fix a test of weldability, if the provided data are not sufficient. 4.1.4 Impact energy When climatic conditions require, materials with proven impact properties at lower temperatures shall be used. 4.1.5 Inspection documents for components The minimum level of conformity of components shall be certified by an inspection document in accordance with EN 10204, 3.1 or 3.2 as requested from the customer. For dimensions which are not included in EN ISO 3183, the minimum requirements shall be agreed between the manufacturer and the purchaser (Charpy impact test). 4.2 Pipes and fittings 4.2.1 Steel pipes The requirements for steel pipes of external diameter greater than DN 600 shall be agreed between the pipeline operator and manufacturer. SIST EN 12007-3:2015

EN 12007-3:2015 (E) 10 Where the nominal wall thickness is greater than or equal to the value given in Table 2, it is not necessary to carry out any stress calculation to take account of internal pressure. Table 2 — Nominal wall thickness Dimensions in millimetres Nominal diameter DN 10 15 20 25 40 50 65 80 100

External diameter D 17,2 21,3 26,9 33,7 48,3 60,3 76,1 88,9 114,3
Nominal wall thickness s 2,3 2,3 2,3 2,6 2,6 2,9 2,9 3,2 3,2

Nominal diameter DN 125 150 200 250 300 350 400 500 600 >600 External diameter D 139,7 168,3 219,1 273 323,9 355,6 406,4 508 610 >610 Nominal wall thickness s 3,6 4 4,5 5 5,6 5,6 6,3 6,3 6,3 1% D In certain situations, consideration should be given to using pipes of greater wall thickness than given in Table 2. EXAMPLE Horizontal drilled sections, crossings with major public works (dykes, waterways, roads, railways), areas with significant soil settlement differences or where pipes are subjected to abnormal ground loading, circumstances, areas where corrosion is a specific issue (for instance where the pipeline is being laid through contaminated or aggressive soils) or where the pipes are being bent or otherwise manipulated. Where wall thicknesses less than those given in Table 2 are being considered, design calculations shall be undertaken. Guidance on wall thickness calculation is given in Annex C. The minimum pipe wall thicknesses shall be as given in Table 3. Table 3 — Minimum wall thickness Dimensions in millimetres Nominal diameter DN 10-20 25-50 65-125 150-300 350-400 ≥450 Minimum wall thickness smin 2,3 2,3 2,6 3,5 4,5 1% D 4.2.2 Fittings Fittings shall comply with the appropriate European Standards. Safety factors of fittings shall be at least equal to the safety factor of the pipes. 4.3 Insulating joints 4.3.1 Type test Insulating joints shall be type tested. Insulating joints can be designed as insulating couplings or insulating flanges. 4.3.2 Strength test Any insulating coupling shall be hydrostatically tested at a test pressure of at least 1,5 times the design pressure of the component. End sealing methods which subject the coupling to axial compression shall not be used. SIST EN 12007-3:2015

EN 12007-3:2015 (E) 11 The hydrostatic cycle test sequence should be agreed upon between pipeline operator and manufacturer. 4.3.3 Tightness test Following a successful hydrostatic test, any insulating coupling shall be tested with air at 5 bar. There shall be no leakage. 4.3.4 Electrical test Any insulating joint shall be tested in dry condition for 1 min at a minimum voltage of 5 000 V a.c. (50 Hz) as foreseen in EN 1594. This shall not give rise to any corona effects or an insulation breakdown. Following a successful hydrostatic test, where applicable, the resistance in the dry condition shall not be less than 0,1 M V d.c. 4.3.5 Inspection documents Conformity of insulating joints shall be certified by an inspection document 3.1 in accordance with EN 10204. 4.4 Valves Valves shall comply with the appropriate European Standards. In the absence of a European Standard, the appropriate standard of a member country may be used. Metallic valves shall be in accordance to EN 13774. 4.5 Corrosion protection 4.5.1 General Corrosion protection systems shall conform to the relevant International, European or National Standards. Two kinds of corrosion protection can apply: — passive corrosion protection; — active corrosion protection. 4.5.2 Passive corrosion protection For passive protection provided by means of external coating, the corrosion protection has to fulfil the applicable International, European or National Standards. For buried pipes a coating is required in accordance with relevant European and/or National Standards. EXAMPLE 1 Examples of standards for coatings on buried pipes are: — EN ISO 21809-1; — EN 10288; — DIN 30670. For pipe joints and fittings, the coating system may be agreed with the supplier, in accordance with EN 12068, EN 10289 or EN 10290. Conformity of coating shall be certified by an inspection document in accordance with EN 10204. SIST EN 12007-3:2015

EN 12007-3:2015 (E) 12 EXAMPLE 2 For pipework under 5 bar – Document 2.2 according to EN 10204. For above ground pipes, an adequate corrosion protection is required, e.g. painted or wrapped coatings: EXAMPLE 3

EN ISO 12944. 4.5.3 Active corrosion protection Where an active corrosion protection is required, it shall comply with EN 12954, EN 50162 and EN 15280 and shall be approved with a measuring procedure according to EN 13509. Also the relevant clause in EN 12007-1 shall be considered. For installation, start up, inspection and maintenance of the cathodic corrosion protection the measurements shall be evaluated by a competent person according to EN 15257 Grade 2, or a suitable alternative. 4.6 Jointing methods 4.6.1 Welding joints Pipes and other pipeline components should preferably be welded. Welding, non-destructive testing, other related activities and documentations shall be carried out in accordance with EN 12732. 4.6.2 Flanged joints Flanges, gaskets and bolting shall conform to EN 1092-1, EN 1514-1, EN 1514-2, EN 1514-3, EN 1514-4, EN 1515-1, EN 1515-2, EN 1591-1, EN 1591-2, EN 1759-1, EN 12560-1, EN 12560-2, EN 12560-3, EN 12560-4 and EN 12560-5, where applicable. Gaskets shall correspond to the flange type being used and be made of material that is resistant to the transported gas. Gaskets shall not contain asbestos. 4.6.3 Threaded joints Threaded joints shall not be used below ground for pipes greater than DN 50 nor for MOP greater than 5 bar. The use of threaded joints indoors and above ground on pipes greater than DN 50 for pressures up to 5 bar shall be subject to a risk assessment. Suitable seals shall be used on threaded joints. Threaded joints shall conform to EN 10226-1 and have an internal parallel thread and an external tapered thread. Threaded tube shall conform to EN 10255. 4.6.4 Compression joints Compression joints shall not be used for pipes greater than DN 50 nor for MOP greater than 5 bar. Compression joints shall conform to appropriate standards. If no standard is available they shall conform to manufacturer's instructions and shall be type tested. SIST EN 12007-3:2015

EN 12007-3:2015 (E) 13 5 Construction 5.1 Handling, transportation and storage General requirements are given in EN 12007-1. Further guidance is given in Annex A. 5.2 Laying 5.2.1 General The pipework should be lowered into the trench as soon as possible after the st

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.