This document describes the functional requirements for pipelines for maximum operating pressure over 16 bar. This document also describes the mechanical requirements for pipework in stations with a maximum operating pressure greater than 16 bar. NOTE 1 Welding requirements are described in EN 12732. Functional requirements for stations are given in EN 1776, EN 1918-5, EN 12186, and EN 12583. This document is applicable for transporting gas via onshore high-pressure steel pipeline infrastructures, where the following applies: – onshore: – from the point where the pipeline first crosses what is normally accepted as battery limit between onshore and offshore, and that is not located within commercial or industrial premises as an integral part of the industrial process on these premises except for any pipelines and facilities supplying such premises; – pipeline system with a starting point onshore, also when parts of the pipeline system on the mainland subsequently cross fjords, lakes, etc. – high pressure: gas with a maximum operating pressure over 16 bar and a design temperature between \u221240 \u00b0C and 120 \u00b0C. – steel pipeline infrastructure: infrastructure consisting of pipeline components, such as pipes, valves, couplings and other equipment, restricted to components made of unalloyed or low alloyed carbon steel and joined by welds, flanges or mechanical couplings. – gas: non-corrosive natural gas, biomethane gas, hydrogen gas and mixtures of these gases where technical evaluation has ensured that operating conditions or constituents or properties of the gas do not affect the safe operation of the pipeline. Gas infrastructures covered by this document begin after the gas producer’s metering station. NOTE 2 The functional demarcation of the pipeline system is usually directly after an isolating valve of the installation, but can differ in particular situations. The functional demarcation of the pipeline system is usually located on an isolating valve of the installation, but can differ in particular situations. A schematic representation of pipelines for gas infrastructure is given in Figure 1. This document can also be applied to the repurposing of existing pipelines. [Figure 1 – Schematic representation of pipelines for gas supply over 16 bar] This document specifies common basic principles for gas infrastructure. Users of this standard are expected to be aware that more detailed national standards and\/or code of practice can exist 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 standard, the national legislation\/regulation takes precedence as illustrated in CEN\/TR 13737. CEN\/TR 13737 gives: – clarification of all legislations\/regulations applicable in a member state; – if appropriate, more restrictive national requirements; – a national contact point for the latest information.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 1 Scope <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 4 Quality and management systems <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 5 Safety and the environment 5.1 General 5.2 Appropriate safety measures <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.3 Routing considerations 5.3.1 General 5.3.2 Surveys 5.3.3 Environmental impact <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 5.3.4 Ground conditions 5.4 Line valve spacing 6 Pressure safety 6.1 Pressure levels <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.2 Normal operation 6.3 Requirements for installation of pressure safety devices <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 6.4 Pipeline with DP equal to or less than 40 bar and hoop stress \u2264 0,45 Rt0,5 6.5 Pipeline with DP equal to or less than 24 bar and hoop stress \u2264 0,30 Rt0,5 7 Design 7.1 General 7.1.1 Design principles 7.1.2 Basis of design 7.1.2.1 Pipeline <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 7.1.2.2 Pipeline sections 7.2 Wall thickness determination 7.2.1 Straight pipe <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 7.2.2 Bends and elbows 7.3 Additional design requirements 7.3.1 Forces <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 7.3.2 Soil engineering data required 7.3.3 Structural models for pipeline sections <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 7.4 Analysis of stress and strain 7.4.1 Elastic and extended elastic design 7.4.1.1 General 7.4.1.2 Resultant stress 7.4.1.3 Allowable resultant stress <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 7.4.2 Limit state design 7.4.2.1 General 7.4.2.2 Relevant limit states <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 7.5 Design report <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 7.6 Land management and geotechnical studies 7.7 Depth of cover 7.8 Casing pipes <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 7.9 Station design 7.9.1 Layout <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 7.9.2 Components 7.9.3 Interaction with onshore pipeline section <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 7.9.4 Station pipework 7.10 Pipeline components 7.11 Pigging suitability 7.12 Arrangements for venting, recompression and flaring <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 7.13 Corrosion protection 7.13.1 General 7.13.2 External coating 7.13.2.1 External coating for above-ground pipeline sections 7.13.2.2 External coating for buried pipeline sections <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 7.13.3 Cathodic protection 7.13.3.1 Basic requirement 7.13.3.2 Electrical interference 7.13.3.3 Insulation joints 7.13.3.4 Commissioning 7.14 Grid connections <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 8 Materials and components 8.1 General 8.1.1 Base material 8.1.2 Manufacturing requirements 8.1.3 Manufacturing procedure 8.1.4 Weldability 8.1.4.1 General 8.1.4.2 Pipe 8.1.4.3 Other pipeline components <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 8.1.5 Mechanical properties 8.1.5.1 Impact energy 8.1.5.2 Impact test temperature 8.1.5.3 Tensile properties <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 8.1.5.4 Hardness of welds 8.1.5.5 Properties after forming and heat treatment 8.1.6 Inspection documents 8.1.6.1 Manufacturing under a comprehensive quality system 8.1.6.2 Manufacturing not under a comprehensive quality system 8.1.6.3 Small components 8.1.7 Other steel types or grades 8.1.8 Records 8.2 Pipes <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 8.3 Fittings 8.3.1 General 8.3.2 Manufacturing 8.4 Flanged connections 8.5 Insulating connections 8.5.1 Type test 8.5.2 Strength test <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 8.5.3 Electrical test 8.5.4 External tightness test 8.6 Valves 8.7 External and internal coatings 8.8 Welding end preparation 9 Construction 9.1 General 9.2 Execution of work 9.2.1 General 9.2.2 Marking out the site <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 9.2.3 Initial site inspections 9.2.4 Working strip 9.2.5 Separation of topsoil 9.2.6 Trenches <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | 9.2.7 Crossing and proximity of buried structures (cables and pipes) 9.2.8 Handling and stringing <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | 9.2.9 Bends 9.2.9.1 Elastic bends 9.2.9.2 Field bends 9.2.10 Welding and weld examination 9.2.11 External coating 9.2.11.1 General <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | 9.2.11.2 Surface preparation, application conditions 9.2.11.3 Coating welded joints and uncoated parts of pipes 9.2.11.4 Repairing the coating 9.2.11.5 Coating valves, fittings and cable-to-pipe connections <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | 9.2.11.6 Inspections 9.2.11.7 Mechanical protection 9.2.11.8 Rocky ground <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | 9.2.11.9 Trenchless 9.2.12 Lowering into the trench 9.2.13 Ballasting and anchoring 9.2.14 Tie-ins 9.2.15 Backfill <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | 9.2.16 Reinstatement 9.2.17 Markings 9.2.18 Final site inspection with owners and users 9.3 Special crossings 9.3.1 General 9.3.2 Open-trench road or path crossings <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | 9.3.3 Trenchless crossings <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | 9.3.4 Requirements for casings 9.3.5 Open trench major water crossings 9.3.6 Horizontal directional drilling <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | 9.4 Cleaning 9.5 Testing 9.5.1 General <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 9.5.2 Test preparation 9.5.3 Strength test 9.5.4 Tightness test <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | 9.5.5 Pre-testing 9.5.6 Dewatering 9.5.7 Golden welds 9.6 Acceptance 9.6.1 As-built documents 9.6.2 Pre-commissioning <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | 9.6.3 Handover and documentation 10 Operation and maintenance 10.1 General 10.1.1 Policy 10.1.2 Safety and environment 10.2 Organization <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | 10.3 Operating and maintenance instructions <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | 10.4 Emergency plan 10.5 Records and documentation 10.6 Commissioning <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | 10.7 Decommissioning 10.8 Recommissioning 10.9 Maintenance, modification, and repair 10.9.1 General 10.9.2 Pipeline surveillance, inspection and monitoring <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | 10.9.3 Execution of repairs and modifications 10.9.4 Work involving cutting of the pipeline 10.9.5 Work on in-service pipelines <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | 10.9.6 Repairs after emergency 10.9.7 Other and special maintenance activities <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | 10.10 Introduction of hydrogen in existing natural gas pipelines 10.11 Abandonment and removal <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | Annex A (normative)Requirements for fracture arrest of line pipe A.1 General <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | A.2 CVN impact test <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | A.3 Drop weight tear test A.4 Test pieces, method, and frequency for CVN and DWT tests <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Annex B (informative)Hydrogen gas pipelines B.1 General B.2 New pipelines B.3 Existing pipelines <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | B.4 Other considerations <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Gas infrastructure. Pipelines for maximum operating pressure over 16 bar. Functional requirements<\/b><\/p>\n |