prEN 14161

SLOVENSKI STANDARD
01-september-2021
Industrija za predelavo nafte in zemeljskega plina - Transportni cevovodni sistemi
(ISO 13623:2017, spremenjen)
Petroleum and natural gas industries - Pipeline transportation systems (ISO 13623:2017,
modified)
Erdöl- und Erdgasindustrie - Rohrleitungstransportsysteme (ISO 13623:2017, modifiziert)
Industries du pétrole et du gaz naturel - Systèmes de transport par conduites (ISO
13623:2017, modifié)
Ta slovenski standard je istoveten z: prEN 14161
ICS:
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 75.200 Will supersede EN 14161:2011+A1:2015
English Version
Petroleum and natural gas industries - Pipeline
transportation systems (ISO 13623:2017, modified)
Industries du pétrole et du gaz naturel - Systèmes de Erdöl- und Erdgasindustrie -
transport par conduites (ISO 13623:2017, modifié) Rohrleitungstransportsysteme (ISO 13623:2017,
modifiziert)
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 12.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14161:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 8
Introduction . 9
1 Scope . 10
2 Normative references . 12
3 Terms, definitions and symbols . 13
3.1 Terms and definitions . 14
3.2 Symbols . 16
4 General. 17
4.1 Health, safety and the environment . 17
4.2 Competence assurance . 17
4.3 Conformance . 17
4.4 Records . 17
5 Pipeline system design . 17
5.1 System definition . 17
5.2 Categorization of fluids . 17
5.3 Hydraulic analysis . 18
5.4 Pressure control and overpressure protection . 18
5.5 Requirements for operation and maintenance . 18
5.6 Public safety and protection of the environment . 19
6 Design of pipeline and primary piping . 19
6.1 Design principles . 19
6.2 Route selection . 20
6.2.1 Considerations . 20
6.2.2 Surveys — On-land pipelines . 21
6.2.3 Surveys — Offshore pipelines . 21
6.3 Loads . 22
6.3.1 General. 22
6.3.2 Functional loads . 22
6.3.3 Environmental loads. 23
6.3.4 Construction loads . 24
6.3.5 Accidental loads . 24
6.3.6 Combination of loads . 24
6.4 Strength requirements . 25
6.4.1 Calculation of stresses . 25
6.4.2 Strength criteria . 25
6.5 Stability . 29
6.6 Pipeline spanning . 30
6.7 Pressure test requirements . 30
6.7.1 General. 30
6.7.2 Test medium . 30
6.7.3 Pressure levels and test durations . 31
6.7.4 Acceptance criteria. 31
6.8 Other activities . 31
6.8.1 Activities by others . 31
6.8.2 Pipeline cover . 32
6.9 Crossings and encroachments . 33
6.9.1 Consultations with authorities . 33
6.9.2 Roads . 33
6.9.3 Railways . 33
6.9.4 Waterways and landfalls . 33
6.9.5 Pipeline/cable crossings . 34
6.9.6 Pipeline bridge crossings. 34
6.9.7 Sleeved or cased crossings . 34
6.10 Adverse ground and seabed conditions . 34
6.11 Section isolation valves . 34
6.12 Integrity monitoring . 35
6.13 Design for pigging . 35
6.14 Fabricated components . 35
6.14.1 Welded branch connections . 35
6.14.2 Special components fabricated by welding . 36
6.14.3 Extruded outlets . 36
6.14.4 Pig traps . 36
6.14.5 Slug catchers . 36
6.14.6 Fabricated assemblies . 36
6.15 Attachment of supports or anchors . 36
6.16 Offshore risers . 37
7 Design of stations and terminals . 38
7.1 Selection of location . 38
7.2 Layout . 38
7.3 Security . 39
7.4 Safety . 39
7.5 Environment . 39
7.6 Buildings . 39
7.7 Equipment . 39
7.8 Piping . 40
7.8.1 Primary piping . 40
7.8.2 Secondary piping . 40
7.9 Emergency shutdown system . 40
7.10 Electrical . 41
7.11 Storage and working tankage . 41
7.12 Heating and cooling stations . 41
7.13 Metering and pressure control stations . 41
7.14 Monitoring and communication systems . 41
7.15 Compressor stations for on-land gas supply systems . 42
8 Materials and coatings . 42
8.1 General material requirements for pipelines and primary piping . 42
8.1.1 Selection . 42
8.1.2 Materials for sour service . 42
8.1.3 Consistency of requirements . 42
8.1.4 Chemical composition . 42
8.1.5 Brittle fracture toughness . 43
8.1.6 Shear-fracture toughness . 43
8.1.7 Higher-temperature service . 43
8.1.8 Properties after forming and heat treatment . 44
8.1.9 Production qualification programmes . 44
8.1.10 Marking . 44
8.1.11 Inspection documents . 44
8.1.12 Specifications . 44
8.1.13 Reuse of components . 44
8.1.14 Records . 45
8.2 Line pipe . 45
8.2.1 Carbon steel pipe . 45
8.2.2 Stainless steel and non-ferrous metallic pipe . 45
8.2.3 Carbon steel pipe with stainless steel or non-ferrous metallic layer . 45
8.3 Components other than pipe . 45
8.3.1 Flanged connections . 45
8.3.2 Bends made from pipe . 45
8.3.3 Fittings . 46
8.3.4 Valves . 46
8.3.5 Fabricated isolating couplings . 46
8.3.6 Other components . 46
8.4 Coatings . 46
8.4.1 External coatings . 46
8.4.2 Internal coatings/linings . 47
9 Corrosion management . 48
9.1 General. 48
9.2 Internal corrosivity evaluation . 48
9.3 Internal corrosion mitigation. 49
9.3.1 Methods . 49
9.3.2 Revision of design conditions . 49
9.3.3 Chemical additives . 49
9.3.4 Internal coatings or linings . 50
9.3.5 Cleaning . 50
9.4 External corrosion evaluation . 50
9.5 External corrosion mitigation . 51
9.5.1 Protection requirements . 51
9.5.2 External coatings . 52
9.5.3 Cathodic protection . 52
9.6 Monitoring programmes and methods . 52
9.6.1 Requirement for monitoring . 52
9.6.2 Monitoring internal corrosion . 53
9.6.3 Monitoring external condition . 53
9.6.4 Monitoring cathodic protection . 53
9.7 Evaluation of monitoring and inspection results . 53
9.8 Corrosion-management documentation . 54
10 Construction . 54
10.1 General. 54
10.1.1 Construction plan . 54
10.1.2 Construction near other facilities . 54
10.1.3 Plant, equipment and marine vessels. 55
10.1.4 Transport and handling of materials. 55
10.2 Preparation of the route on-land . 55
10.2.1 Site inspections . 55
10.2.2 Survey and marking . 55
10.2.3 Preparation of the working width . 55
10.2.4 Blasting . 55
10.3 Preparation of the route offshore . 55
10.3.1 Surveys. 55
10.3.2 Seabed preparation . 55
10.4 Welding and joining . 56
10.4.1 Welding standard . 56
10.4.2 Weld examination . 56
10.4.3 Joining other than welding . 56
10.5 Coating . 56
10.5.1 Field joint coating . 56
10.5.2 Coating inspection . 56
10.6 Installation of on-land pipelines . 56
10.6.1 Pipe stringing . 56
10.6.2 Field pipe bends . 56
10.6.3 Excavation . 57
10.6.4 Lowering pipe . 57
10.6.5 Backfill . 57
10.6.6 Tie-in . 58
10.6.7 Reinstatement . 58
10.6.8 Crossings . 58
10.6.9 Markings . 58
10.7 Installation of offshore pipelines . 58
10.7.1 Marine operations . 58
10.7.2 Survey and positioning systems . 59
10.7.3 Pipe laying . 59
10.7.4 Landfalls . 60
10.7.5 Trenching . 60
10.7.6 Backfilling. 60
10.7.7 Crossings of other pipelines and cables . 60
10.7.8 Spans . 60
10.7.9 Tie-ins . 61
10.8 Cleaning and gauging . 61
10.9 As-built surveys . 61
10.10 Construction records . 61
11 Testing . 61
11.1 General . 61
11.2 Safety . 62
11.3 Procedures . 62
11.3.1 Written procedures . 62
11.3.2 Communications . 62
11.3.3 Water quality. 62
11.3.4 Inhibitors and additives . 63
11.3.5 Filling rate . 63
11.3.6 Air content . 63
11.3.7 Temperature stabilization . 63
11.3.8 Temperature effects and correlations . 63
11.3.9 Leak-finding . 63
11.4 Acceptance criteria . 63
11.5 Tie-ins following testing . 63
11.6 Testing equipment . 63
11.7 Test documentation and records . 64
11.8 Disposal of test fluids . 64
11.9 Protection following test . 65
12 Pre-commissioning and commissioning . 65
12.1 General . 65
12.2 Cleaning and gauging procedures . 65
12.3 Drying procedures . 65
12.4 Functional testing of equipment and systems . 66
12.5 Documentation and records . 66
12.6 Start-up procedures and introduction of transported fluid . 66
13 Operation, maintenance and abandonment . 67
13.1 Management . 67
13.1.1 Objectives and basic requirements . 67
13.1.2 Operating and maintenance plan . 67
13.1.3 Operating and maintenance procedures. 67
13.1.4 Incident and emergency-response plan . 68
13.1.5 Permit-to-work system . 68
13.1.6 Training . 68
13.1.7 Liaison . 69
13.1.8 Records . 69
13.2 Operations . 69
13.2.1 Fluid parameter monitoring . 69
13.2.2 Stations and terminals . 70
13.2.3 Pigging . 70
13.2.4 Decommissioning . 70
13.2.5 Recommissioning . 70
13.3 Maintenance . 70
13.3.1 Maintenance programme . 70
13.3.2 Route inspection . 71
13.3.3 Mechanical condition monitoring . 72
13.3.4 Leak detection and surveys . 72
13.3.5 Facilities, equipment and component monitoring . 72
13.3.6 Pipeline and piping defects and damage . 74
13.3.7 Pipeline and piping repairs and modifications . 75
13.4 Changes to the design condition . 77
13.4.1 Change control . 77
13.4.2 Operating pressure . 77
13.4.3 Service conversion . 77
13.4.4 New crossings and developments . 78
13.4.5 Moving in-service pipelines and piping . 78
13.4.6 Testing of modified pipelines and piping . 78
13.4.7 Changes to location class . 78
13.5 Life extension . 78
13.6 Abandonment . 79
Annex A (informative) Records and documentation . 80
Annex B (normative) Supplementary requirements for public safety of on-land pipelines
for category D and E fluids . 81
B.1 Objective . 81
B.2 Location classification . 81
B.3 Population density . 82
B.4 Concentration of people . 82
B.5 Maximum hoop stress . 82
B.6 Pressure test requirements . 83
B.7 Location classification for existing pipelines . 83
B.8 MAOP requirements after changes in location class . 83
B.9 Third party damage mitigation . 86
Annex C (informative) Pipeline route selection process . 87
C.1 Limits . 87
C.2 Constraints . 87
C.3 Preferred corridors of interest . 87
C.4 Detailed routing . 8
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