Content of DVGW Information GAS No. 29 This DVGW Information GAS No. 29 provides an overview of the requirements that must be met for the use of hydrogen in systems for the pipeline-bound supply of the general public and the connected gas applications so that these can be labelled "H2-ready".  In this DVGW Information GAS No. 29, a model is proposed to visualise the different levels of assessment in order to classify statements on the readiness of infrastructures for the grid-based supply of hydrogen. The term "H2-ready" is used to describe this readiness for hydrogen use, which is explained in the respective context in this DVGW Information GAS No. 29.  The proposed model can also be applied analogously to new or existing plants for operational self-supply in which hydrogen is to be used, taking into account the specific legal requirements.  Safe operation with the hazardous substance natural gas is already guaranteed for gas supply networks and gas applications. If a natural gas network is converted into a hydrogen network, the same level of safety can be guaranteed if the DVGW Codes of Practice applicable to hydrogen are taken into account - without prejudice to other legal requirements. Table of contents Foreword 1 Scope 2 DVGW Codes of Practice 3 Terms and definitions 4 Model for the application of the term "H2-ready" 5 Assessment of the gas infrastructure and gas applications   Anhang A - Overview of important DVGW Set of Rules and the supporting H2 guidelines Bibliography German version DVGW-Information GAS Nr. 29 Buy DVGW Information GAS No. 29 You can purchase DVGW Information GAS No. 29 as PDF file for immediate download. 

Content of DVGW Guideline G 404 DVGW Guideline G 404 introduces provisions for the technical reduction of emissions in the Gas Infrastructure. Many of the measures listed in this DVGW-Guideline G 404 have already been used in the gas infrastructure for years for safety reasons, but if applied promptly, they also lead to a reduction in emissions and thus make an important contribution to environmental relief. The main measures used in practice are listed in G 404. According to the current state of knowledge, these can also be used in networks for hydrogen-containing methane-rich gases (2nd gas family) and for hydrogen (5th gas family) in accordance with DVGW Code of Practice G 260. The German gas network consists of different materials and nominal diameters and already has very low methane emissions. In particular, the constantly updated requirements from the DVGW regulations regarding maintenance have led to a continuous reduction in methane losses in the German gas industry in recent years.Methane emissions have various natural and man-made sources. They account for a total of 6 % of all green-house gases in Germany, which are mainly produced in agriculture and waste management, but also partly in the energy industry using coal, oil and natural gas. According to the current status, the German gas infrastructure accounts for methane emissions, which correspond to 0.08 % of the total anthropogenic greenhouse gas emissions in Germany of 760 million tonnes of CO2 equivalent in 2021. These arise from the transport and distribution of methane-rich gas and are to be further reduced through technical measures. Table of contents Foreword 1 Scope 2 Normative references 3 Terms, symbols, units and abbreviations 4 Types of gas emissions 5 Localisation of gas emission sources in the gas infrastructure 6 Measures to reduce gas emissions in the gas infrastructure References Important normative references DVGW Code of Practice G 260 DVGW Code of Practice G 265-2 DVGW Code of Practice G 441 DVGW Guideline G 452-1 DVGW Code of Practice G 465-2 DVGW Code of Practice G 491 DVGW Code of Practice G 600 DVGW Code of Practice GW 10 DVGW Guideline GW 18 DVGW Code of Practice GW 27   Buy DVGW Guideline G 404 You can purchase DVGW G 404 Guideline as PDF file for immediate download. 

Content of DVGW Guideline G 269 G 269 provides recommendations for the quantification of gas components that can be relevant for purpose of monitoring compliance with standards.  DVGW G 269 provides recommendations for measuring the quality of gases of the 2nd and 5th gas family in accordance with DVGW Code of Practice G 260 for feeding into gas networks. This document also considers minor components of gases that are used for conditioning (biogas) gases for the purpose of feeding them into the grid. The following changes have been made compared to DVGW Guideline G 269:2016-09 Expansion of the scope of application by including the 5th gas family Editorial adaptation of standards, test procedures and determination methods Inclusion of a parameter table for calculating the combustion characteristics Consideration of additional feed-in/supply points  Table of contents Foreword Introduction    1 Scope 2 Normative references    3 Terms, symbols, units and abbreviations    4 Test parameters and limit values    5 Condition determination        6 Logging/verification     Important normative references DVGW Code of Practice G 260DVGW Code of Practice G 264DVGW Code of Practice G 488     Buy DVGW Guideline G 269 You can purchase DVGW Guideline G 269 as PDF file for immediate download. 

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.

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.

This Technical Rule G 280 applies to all gases covered in DVGW Codes of Practice G 260 and G 262 respectively Standards DIN EN 16723-1 and -2 as well as DIN EN 16726 and all gases used for the supply via pipeline system of the general public and other consumers with a comparable level of safety. When using sulfur-containing odorants, the fact shall be taken into account that the entailed increase of the sulfur content in the gas is undesirable for some applications, such as its use as basic material in the chemical industry. Industrial companies using natural gas exclusively on company premises can forego odorization if the operator utilizes other measures to maintain the industrial gas plant or system’s safety. When switching from one odorant to another, special attention shall be paid to Section 9. The calibration of measuring devices for odorant control requires test gases which are detailed in Section 10.

This document DIN CEN TR 17797 is written in preparation of future standardization and provides guidance on how injection of H2 into the gas infrastructure can impact processes from the input of gas into the on-shore transmission network up to the inlet connection of gas appliances.

This Standard shall also apply, mutatis mutandis, to gas mixing plants that supply process gas to trade and industry and to industrial gas mixing plants for in‑house mixed‑gas supply.Gas mixing plants are frequently integrated into gas measurement and pressure reduction stations, which latter shall meet the specifications of DVGW Standards G 491 and G 492. In other words, most of the requirements specified in these Standards will also apply to gas mixing plants. All other requirements that go beyond the scope of G 491 and G 492 are described in this Technical Rule at hand, which first and foremost complements DVGW Standard G 491.