In conjunction with DIN EN 1594, this Technical Rule G 463 applies to the planning and construction of steel high pressure gas pipelines with a design pressure of more than 16 bar for supplying gas to the general public as well as to connected energy facilities on company premises and in the field of commercial gas application of gases of the 2nd and 5th gas family as defined by DVGW Code of Practice G 260. The scope of application has no upwards limitation in terms of the technical parameters nominal diameter and design pressure. This Technical Rule can be applied mutatis mutandis to the construction of high pressure gas pipelines which do not conform to the specifications of DVGW Code of Practice G 260, provided that the specific characteristics of the gases or, if applicable, other already existing technical sets of rules are taken into account.

This Draft of Code of Practice C 260 helps to ensure the safety and health protection of persons as well as the technical integrity of pipelines, systems and system components for transporting CO₂ in pipelines made of steel pipes. C 260 Draft Code of Practice specifies requirements for the composition of CO₂ and CO₂ streams. It establishes the framework conditions for the supply, transportation, distribution, storage and operation of systems and appliances and for commercial and industrial applications that are planned, built and operated in accordancewith the DVGW regulations (C series). It forms the basis for development, standardization and testing. This Draft of Code of Practice C 260 describes the characteristics and requirements for the properties of a carbon dioxide stream for transportation in steel pipelines and also contains recommendations and information on the effects of CO₂ streams on the design and operation of CO₂ pipeline transportation systems. CO₂ streams within the meaning of this regulation originate from capture processes and are transported to storage sites or for further utilization. The capture processes are either upstream or downstream of the actual power plant or industrial process. The following sources and emitters may be considered, for example: Power plant processes: Gas-fired power plants Thermal waste treatment Biomass power plants Power plants with integrated gasification Industrial processes: Steel production Biomethane production Cement production Building material production Lime production Chemical industry Glass production Foundries The different sources of CO₂ streams result in different compositions, which in turn have a major influence on the design and operation of CO₂ transport pipelines. In the following, the possible influences and consequences of accompanying substances for transportation in steel pipelines are described in more detail. The behaviour and transport of impurities within CO₂ streams described in this document has, where it is available, been based on experimental or operational experience. Where this experience is not currently available, a conservative figure has been used, based, for instance, on theoretical modelling. Once appropriate experience has been gained it is expected to raise some permissible levels so that unnecessary processing expense can be avoided.

The DVGW set of rules G 414 for the installation (planning, building and commissioning) of gas pipework focuses on buried gas pipework; it contains only few instructions to be observed when installing above-ground gas pipework.

This standard G 493-2 encompasses personal and professional requirements for companies providing maintenance for gas plants and installations that fall within the scope of DVGW G 495 (A), as well as biogas injection and refeeding plants as specified by DVGW G 265-2 or hydrogen injection plants as specified by DVGW G 265-4 (M).Companies which, within the context of comprehensive plant management, either as original operators or as contractors, are responsible for the maintenance of energy plants, and possess the required personal qualification and organization according to DVGW G 1000 (A), may conduct the maintenance of gas plants without certification as defined by this standard within the network which they have the abovementioned responsibility for. The prerequisite for the maintenance without certification as mentioned above is that the expert and tech-nical conditions detailed in this standard are met by the company’s own workforce or by service providers with a TSM certification or other corresponding certifications. The company shall appoint the experts re-sponsible for maintenance in writing. The fulfilment of these conditions can be verified e.g. during a TSM review according to DVGW G 1000 (A).

This Technical Rule G 492 governs planning, manufacturing, assembly, testing, commissioning and operation, as well as decommissioning and disposal of gas measuring systems of up to 100 bar1 in gas transportation and distribution systems and stations supplying commercial, industrial, or other comparable facilities.

Code of Practice GW 315 provides essential information on how to avoid damaging to existing supply systems during construction operations. It applies to all construction work  and regulates the requirements for construction contractors and operators of supply systems.

This document ISO 17885 specifies the requirements for mechanical fittings for joining plastic piping systems for the supply of gaseous fuels, the supply of water for human consumption and other purposes, as well as for industrial application. It provides a unified set of test methods to check the performance of the fittings, depending on their intended use. It is the responsibility of the purchaser or specifier to select the appropriate fitting, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.

This Technical Rule G 260 specifies the requirements for the quality of fuel gases used in the supply of the general public with gas and sets the parameters for gas delivery, gas transportation, gas distribution, gas storage, operation of gas plants/systems and gas appliances for commercial and industrial gas applications as well as for development, standardization, and testing. Gases transported in separate pipelines which are not used in the supply of the general public, or are used as energy carrier or resource, and/or are used in special gas appliances are not subject to the scope of this Technical Rule.

G 452‑3 Technical Information ‑ Guideline 03/2021

G 452‑2 Technical Rule ‑ Standard 08/2020

G 473 Guideline 01/2018

GW 301 Technical Rule ‑ Standard 01/2021

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.

For the purposes of this Standard GW 381, the term minimum requirements implies that further requirements can ensue from technical rules and legal provisions and/or that the ordering party may stipulate further requirements, in particular in the presence of special features or needs for protection or other constraints. The optional criteria shall, without claiming to be exhaustive, be considered guidance for the ordering party who shall decide on the need for further requirements. If a company consists of several units, this technical rule applies to the units in charge of underground construction and, without exception, to independent subsidiaries as well. A subsidiary shall be assumed to be independent if, in effect, it actually controls most operations and/or if the head office of the company is unable to provide the supervision of the staff and the construction sites as required.

This DVGW Standard G 2000 integrates into the existing structure of laws, ordinances and technical rules on the design, construction, operation and maintenance of gas supply networks. It follows the principle of subsidiarity and represents - together with the DVGW Set of Rules and other relevant technical regulations - the minimum technical requirements for the interoperability of and connection to systems of the gas supply network in an objective and unbiased way.The requirements of DVGW Standard G 262 and DVGW Guideline G 292 shall be observed in respect of the injection of renewable gases into public gas supply networks.The overall recognised technical rules continue to apply in full to the design, construction, operation and maintenance of gas supply networks and systems.

This Guideline G 450 shall be used together with DVGW Standard G 466‑1. It intends to promote a standardised approach to pigging gas pipelines that operate under positive operating pressure and contain a product. This Guideline is based on the long‑standing, tried and trusted safety philosophy and experience of the German gas sector.