20/30409090 DC - BS EN 12732. Gas infrastructure. Welding steel pipework. Functional requirements

20/30409090 DC

BS EN 12732. Gas infrastructure. Welding steel pipework. Functional requirements

Status : Current, Draft for public comment   Published : April 2020



This document contains requirements for the production and testing of weld joints for the installation and modification, including in-service welding, of onshore steel pipelines and pipework used in gas infrastructure. This includes all pressure ranges and processed, non-toxic and non-corrosive natural gas according to EN ISO 13686 and non-conventional gases such as (injected) biomethane and hydrogen, where:

  • the pipeline elements are made of unalloyed or low-alloyed carbon steel;

  • the pipeline is not located within commercial or industrial premises as integral part of the industrial process on those premises except for any pipelines and facilities delivering gas to such premises;

  • the pipework is not located within household installations according to EN 1775;

  • the design temperature of the system is between −40 °C up to and including 120 °C.

For injected biomethane or hydrogen a detailed technical evaluation of the functional requirements is required, ensuring there are no other constituents or properties of the gases that can affect the integrity of the pipeline.

This document is not applicable to welds produced prior to the publication of this document.

Table 1 assigns the application areas to quality requirement categories as a function of the working pressure and pipe materials used.

When using this standard the following is defined by the pipeline operator, the applicable paragraph is given in brackets;

  1. Applicable quality requirement category. (scope)

  2. Applicable quality requirements as defined in Table 2. (4.1)

  3. Are there specific requirements on VT testing, personnel, and/or qualification. (4.1)

  4. Applicable welding qualification standards. (4.3)

  5. Are all weld metal tensile tests required. (4.3)

  6. When process 311 is used, applicable requirements for welder qualification. (4.4)

  7. For category B and C, are batch certificates required for welding consumables, when required the pipeline operator has to define the contents of the certificate. (Clause 5)

  8. For filler materials not in accordance with listed European standards, is batch qualification with WPQR allowed. (Clause 5)

  9. If overmatching weld material is required. (Clause 5)

  10. If hot deformation for misalignment compensation is allowed for materials of Rt 0,5 ≤ 360 MPa. (6.2.2)

  11. Is the weld always to be covered after completion of welding. (6.6)

  12. For category D, requirements for repair welding procedures. (6.7)

  13. Extent of NDT techniques. (8.2)

  14. Alternative acceptance criteria when applicable. (8.3)

  15. When alternative criteria in accordance with Annex G are used, if alternative weld overmatching criteria are applicable.

Table 1
Allocation to quality requirement categories

[This table has been removed.]

Additional requirements may be specified when, for example:

  • the strain on pipelines and systems,

  • the materials,

  • the line routing,

  • the design or the welding technique

are considered critical.

This document specifies common basic principles for gas infrastructure. Users of this document should be aware that there can exist more detailed national standards and/or codes of practice in the CEN member countries.

This document is intended to be applied in association with these national standards and/or codes of practice setting out the above-mentioned basic principles.

In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this document, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).


CEN/TR 13737 (all parts) contains:

  • clarification of relevant legislation/regulations applicable in a country;

  • if appropriate, more restrictive national requirements;

  • national contact point for the latest information.

Standard Number20/30409090 DC
TitleBS EN 12732. Gas infrastructure. Welding steel pipework. Functional requirements
StatusCurrent, Draft for public comment
Publication Date14 April 2020
Normative References(Required to achieve compliance to this standard)EN ISO 5817, EN ISO 17636-2, EN ISO/IEC 17025, EN ISO 14732, EN ISO 19285, EN 10204, EN ISO 17637, EN ISO 13588, EN ISO 636, EN ISO 14341, EN ISO/IEC 17020, EN ISO 17638, EN ISO 9692-1, EN ISO 9606-1, EN ISO 15609-2, EN ISO 14175, EN ISO 15614-1, EN ISO 6520-1, EN ISO 14174, EN ISO 14171, EN ISO 9712, EN 1708-1, EN ISO 18275, EN ISO 2560, EN ISO 15609-1, EN ISO 17636-1, EN ISO 17640
Informative References(Provided for Information)EN ISO 18563-2, EN ISO 10863:2011, EN ISO 3834-3, EN ISO 3183, EN ISO 15612, EN ISO 3834-1, EN ISO 3452 (all parts), EN ISO 14731:2006, EN ISO 6892-1, EN ISO 16828, EN ISO 3834-2, EN 10025-1, EN 12668-2, EN ISO 18563-3, EN ISO 10675-1, EN ISO 3834-4, EN ISO 11666, EN 12668-1, EN ISO 10893-8, EN ISO 15611, EN ISO 18563-1, EN 12668-3, EN 1775, EN ISO 13686, EN 462-1, EN ISO 15610, EN ISO 15613, EN 12517-1, EN ISO 7963, EN ISO 17632, EN ISO 6947, EN ISO 17635, EN 444, CEN ISO/TR 15608, EN ISO 4063, EN ISO 23278, EN 462-2, EN ISO 15607, EN ISO 23277
International RelationshipsFprEN 12732
Draft Expiry Date02 June 2020
DescriptorsPerformance testing, Quality, Welding, Pipes, Gas pipelines, Gas supply, Pipework systems, Steels
Title in FrenchInfrastructures gazières - Soudage des tuyauteries en acier - Prescriptions fonctionnelles
Title in GermanGasinfrastruktur - Schweißen an Rohrleitungen aus Stahl - Funktionale Anforderungen
File Size1.215 MB
NotesWarning: this draft is not current beyond its expiry date for comments.

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