G 472 Technical Rule - Standard 03/2020
Gas Pipework made of Plastic Pipes for an Operating Pressure up to and including 16 bar; Installation ++ PDF file ++
- Herausgeber/Verlag: DVGW
- Format: 30 pages
- Material: available as PDF only
- Ausgabe: 1st edition 2020
- Hinweis: German version G 472
- Verkaufseinheit: 1
- Mindestabnahme: 1
- Artikel-Nr.: 511629
62,03 €*
The European standardisation activities of the CEN/TC 234 necessitated the technical and editorial Revision of the national set of gas supply rules, with the objective being to eradicate contradictions and harmonise them with the requirements of the European standards and the formally amended framework conditions, ensuring at the same time that the application of the DVGW Set of Rules will also meet the requirements of the European standards that regulate the distribution of gas.Where reasonable and necessary, the requirements of this Standard G 472 have been harmonised with those of DVGW Standard G 462, including, among other things, the revision of minimum distances and the requirement for acceptance test certificates 3.1 in accordance with DIN EN 10204 for components for operating pressures above 5 bar.
Foreword ............................................................................................................................................ 51 Scope ..................................................................................................................................... 72 Normative references ............................................................................................................ 83 Terms and definitions.......................................................................................................... 123.1 Line....................................................................................................................................... 123.2 Pipeline components ............................................................................................................. 123.3 Ordering party ....................................................................................................................... 123.4 Grid operator......................................................................................................................... 133.5 Skilled persons...................................................................................................................... 133.6 Qualified persons .................................................................................................................. 133.7 Technical experts .................................................................................................................. 134 Fundamental requirements ................................................................................................. 134.1 General ................................................................................................................................. 134.2 Personnel and site supervisor ................................................................................................ 134.3 Skilled staff, qualified persons and technical experts .............................................................. 145 Planning............................................................................................................................... 145.1 Pipeline routing ..................................................................................................................... 145.2 Minimum distances ................................................................................................................ 155.2.1 General ................................................................................................................................. 155.2.2 Minimum distances between gas lines and supply and/or disposal lines and/or buildings......... 155.2.3 Minimum distances to power lines.......................................................................................... 165.2.4 Distance to wind power plants................................................................................................ 165.3 Depth of cover....................................................................................................................... 165.4 Pipes and pipeline components.............................................................................................. 165.4.1 Corrosion protection .............................................................................................................. 175.5 Shut-off valves and venting systems ...................................................................................... 175.6 Overpressure protection ........................................................................................................ 185.7 Building documentation.......................................................................................................... 186 Execution of construction work .......................................................................................... 186.1 Working width........................................................................................................................ 186.2 Pipe transport and storage..................................................................................................... 186.3 Component inspection ............................................................................................................186.4 Pipe trench and excavations ...................................................................................................196.5 Installation and joining techniques ..........................................................................................196.5.1 General..................................................................................................................................196.5.2 Bending radius .......................................................................................................................216.5.3 Quality assurance of welds .....................................................................................................226.6 Gas line installation ................................................................................................................226.7 Backfilling ..............................................................................................................................226.8 Culverts .................................................................................................................................236.9 Trenchless techniques............................................................................................................236.10 Installation of shut-off valves ..................................................................................................236.11 Exact location and marking.....................................................................................................237 Pressure testing ...................................................................................................................247.1 General..................................................................................................................................247.2 Methodology ..........................................................................................................................248 Inspection certificate............................................................................................................249 Commissioning.....................................................................................................................2510 Documentation .....................................................................................................................25Annex A (normative) ? Inspection certificates 3.1 in accordance with DIN EN 10204 forcomponents designed for maximum operating pressures above 5 bar ..............................27Annex B (informative) ? Typical inspection certificate ....................................................................28Annex C (informative) ? Typical pipe log..........................................................................................29Annex D (informative) ? Weld test methods .....................................................................................30D.1 Destructive tests.....................................................................................................................30D.1.1 Heated tool butt welding .........................................................................................................30D.1.2 Electrofusion welding..............................................................................................................30D.2 Non-destructive tests..............................................................................................................30D.2.1 Heated tool butt welding .........................................................................................................30D.2.2 Electrofusion welding..............................................................................................................30