Content of DVGW G 102-5 Code of Practice G 102-5 serves as the basis for the qualification of qualified persons for pressure vessels. Certain qualified work may only be carried out by qualified persons. The qualified person shall acquire the necessary knowledge through theoretical training and practical instruction and experience. DVGW Code of Practice G 102-5 specifies the minimum requirements for the scope of the necessary personnel qualifications and the content of the corresponding training courses. Table of contentForeword 1 Scope 2 Normative references 3 Requirements for the qualification of qualified persons for the area of pressure vessels/pressure vessels under pressure 4 Implementation of the expert training 5 Contents of the expert training course 6 Success control 7 Technical requirements for instructors and inspectors Important normative references DVGW Code of Practice G 100DVGW Code of Practice G 495German versionDVGW-Arbeitsblatt G 102-5Buy DVGW G 102-5 Code of Practice You can purchase DVGW G 102-5 Code of Practice as PDF file for immediate download.

Content of DVGW Guideline G 102-8 DVGW Guideline G 102-8 specifies the minimum requirements for the scope of the necessary personnel qualifications and the content of the corresponding training courses. Together with DVGW Code of Practice G 102-1, this Guideline serves as the basis for the qualification of qualified persons for compressor stations and gas expansion systems. In accordance with DVGW Code of Practice G 497, certain qualified work on compressor stations may onlybe carried out by qualified persons. The qualified person shall acquire the necessary knowledge through theoretical training and practical instruction and experience. Table of content Foreword 1 Scope 2 Normative references 3 Requirements for the qualification of qualified persons for compressor and gas expansion systems 4 Realisation of the expert training 5 Contents of the expert training course 6 Performance monitoring 7 Technical requirements for instructors and inspectors Important normative references DVGW Code of Practice G 100 DVGW Code of Practice G 260 DVGW Code of Practice G 492 DVGW Code of Practice G 495 DVGW Code of Practice G 497 German version DVGW-Merkblatt G 102-8   Buy DVGW Guideline G 102-8 You can purchase DVGW Guideline G 102-8 as PDF file for immediate download. 

Content of DVGW Final Report G 202333 In connection with the new construction or conversion of high-pressure gas pipelines, proof of the suitability of the materials used must be provided as part of extensive fracture mechanical tests in accordance with DVGW regulations - depending on the design and the materials used. This currently applies both to the high-pressure range and formally to the low-pressure range. In order to simplify the previously required process, the DVGW initiated the BAG464 research project, with the aim to identify a boundary for the sensible application of fracture mechanical assessment.  As part of the project, fracture mechanical assessments were carried out for typical design parameters for both the distribution network and the transport network. The investigations identify an area in which - taking conservative boundary conditions into account - fracture mechanical assessments do not provide any added value for the safe design of the pipelines.  The identified range fulfils several criteria for safe design and shows, that in particular for a maximum allowable operating pressure (MOP) p ≤ 16 bar, a fracture mechanical assessment only needs to be carried out in very rare exceptions. For MOP 12 bar < p ≤ 16 bar, no fracture mechanical assessments are required up to and including DN 200. For larger diameters, individual case analyses must be carried out. Below MOP p ≤ 12 bar, no fracture mechanical assessments are generally required, if the described boundary conditions are met - regardless of the pipe outside diameter and steel material.  For high-pressure gas pipes with MOP p > 16 bar, however a fracture mechanical assessment can only be dispensed with in a few exceptions. These exceptions are limited to smaller pipe diameters and/or smaller MOP. Table of Contents 1 Task definition 2 Basic procedure for carrying out fracture mechanical tests 3 Analysed Materials 4 Results of the fracture mechanical evaluation 4.1 Design according to DVGW Code of Practice G 462, DIN EN 12007-3, p ≤ 16 bar 4.2 Design for stations in accordance with DVGW Code of Practice G 491, DIN 30690-1 4.3 Design according to DVGW Code of Practice G 463, DIN EN 1594, high-pressure range p > 16 bar 5 Conclusions and outlook 6 References 7 List of Figures 8 List of tables 9 List of symbols Annex  Important normative references G 464 Guideline German Version DVGW-Forschungsbericht G 202333 Buy DVGW Final Report G 202333 You can purchase DVGW Final Report G 202333 as PDF file for immediate download.   

Content of DVGW Code of Practice G 100 DVGW Code of Practice G 100 serves as a basis for assessing the competence of technical experts for inspecting the technical safety of energy systems for gas and hydrogen supply. It specifies qualification requirements for technical experts for energy systems for the pipeline-bound supply of gas and hydrogen to the general public. In the course of converting the gas infrastructure to hydrogen in accordance with DVGW Code of Practice G 260, technical experts have a special role to play. The qualification requirements described in this DVGW Code of Practice G 100 form the basis for the inspections to be carried out in this context. This includes, in particular,the continuous training of the technical experts in relation to the developing state of the art. G 100 describes the qualification requirements for technical experts who inspect and assess the technical safety of gas supply energy systems on the basis of the Energy Industry Act (Energiewirtschaftsgesetz - EnWG) in accordance with the requirements of GasHDrLtgV and the DVGW Set of Rules. The person commissioning the inspection is responsible for selecting a suitable technical expert for the inspection task in question. When commissioning a certified technical expert, the qualification for the relevant technical field can be verified by a valid certificate from a certification body accredited in accordance with GasHDrLtgV or official recognition in accordance with GasHDrLtgV. When commissioning an inspection body, the inspection body is responsible for selecting technical experts qualified for the respective inspection task. The technical expert is also responsible for checking whether his qualifications are sufficient for the inspection task. This Code of Practice G 100 can serve as a basis for this. DVGW Code of Practice G 100 ensures that the legal and technical framework conditions are mastered, only well-trained persons are recognised as technical experts, the technical experts have a practical connection to their area of specialisation, have sound knowledge and experience in the respective area of expertise, the specialised knowledge can be applied to specific issues in the subject area, the tasks, possibilities and discretionary scope of the technical experts can be recognised, used andfilled. The following amendments have been made compared to DVGW Code of Practice G 100:2015-10: The normative references have been adapted to the current status of the DVGW Set of Rules. The term energy facility was adapted due to the planned expansion of the term “Energy” to includehydrogen in the Energy Industry Act in order to clarify that this Code of Practice also applies to hydrogennetworks. The designation of Area of Expertise VIb has been adapted to the contents of the 2020 edition ofDVGW Code of Practice G 472. Notice has been included in the description of the areas of expertise that the technical experts inaccordance with this Code of Practice fulfil the qualification requirements for a person qualified toperform inspections in accordance with the German Industrial Safety and Health Ordinance(Betriebssicherheitsverordnung - BetrSichV) for testing the explosion safety of systems in their respectivearea of expertise. A corresponding explanation has been included in the foreword. In clauses 6.4.2.2, 6.4.2.3, 6.4.2.5 and 6.4.3.8, the term "explosion protection" has been replaced by"explosion safety" in order to establish the reference to the test object in accordance with IndustrialSafety and Health Ordinance (BetrSichV). For area of expertise IX, the required level of qualification was compared with the requirements of DINEN ISO 15257, which has replaced DIN EN 15257. In clause 6.5.1, references to the explosion safety testing for FG II, III, V and VIII have been added asa prerequisite for initial recognition. In Annex A, the listed Technical Rules have been adapted to the current status of Set of Rules andexpanded to include the technical rules on hydrogen systems. Table of contents Foreword 1 Scope 2 Normative references 3 Terms, symbols, units and abbreviations 4 Tasks of experts 5 Areas of Expertise 6 Qualification requirements Annex A (informative) - Assignment of the regulatory documents to the Areas of Expertise References Important normative references DVGW Code of Practice G 213DVGW Code of Practice G 280DVGW Code of Practice G 414DVGW Code of Practice G 463DVGW Code of Practice G 469DVGW Code of Practice G 472DVGW Code of Practice G 492DVGW Code of Practice G 497 German Version DVGW-Arbeitsblatt G 100   Buy DVGW Code of Practice G 100 You can purchase DVGW Code of Practice G 100 as PDF file for immediate download. 

Content of DVGW Code of Practice G 1030 DVGW Code of Practice G 1030 sets out the requirements for the operators of stations for the production, transport, upgrading, conditioning or injection of biogas, irrespective of the ownership structure and organisational form, with regard to the structural and process organisation. Sufficient qualification and organisation of the operators is a prerequisite for ensuring the planning, construction, operation and maintenance of the respective biogas stations, also in compliance with safety and environmental regulations. G 1030 specifies the requirements of the Energy Industry Act (EnWG) for the qualification and organisation of operators of plants for the production, storage, transmission, upgrading, conditioning or injection of biogas or biomethane. According to the EnWG, this also includes hydrogen from renewable sources. DVGW Code of Practice G 1030 has been extensively revised, restructured and changes have been madein almost every section. Only major new topics are therefore listed below. Compared to DVGW Code ofPractice G 1030:2010-12, the following changes have been made in particular: Inclusion of hydrogen from renewable sources in the scope of application in accordance with theEnWG Inclusion of power-to-gas energy systems in the scope of application in accordance with DVGWCode of Practice G 220 Definition of power-to-gas energy plants, hydrogen feed-in plants, biogas and biomethane, contractualpartners (incl. operators, service providers, cooperation partners) Integration of biogas conditioning system into biogas feed-in plant Table of contents Foreword Authors 1 Scope 2 Normative references 3 Terms, symbols, units and abbreviations 4 Basic requirements 5 Tasks and fields of activity 6 Organisation 7 Personnel 8 Contractual partner 9 Technical equipment Important normative references DVGW Code of Practice G 213DVGW Code of Practice G 260DVGW Code of Practice G 415DVGW Code of Practice G 492DVGW Code of Practice G 495 German version DVGW-Arbeitsblatt G 1030   Buy DVGW Code of Practice G 1030 You can purchase DVGW Code of Practice G 1030 as PDF file for immediate download. 

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. 

This DVGW-Information GAS No. 17 provides information on how to implement the lightning protection requirements in accordance with IEC 62305 for systems of gas and hydrogen transport and distribution systemas well as for systems supplying commercial, industrial or comparable facilities. Lightning protection measures are used to protect people, structures and technical equipment against the effects of lightning.

This Guideline G 464 shall apply for the fracture mechanical assessment of steel gas pipelines that already exist or are projected for construction with a design pressure of more than 16 bar for the transportation or distribution of gases of the 5th gas family (hydrogen) as specified by DVGW Code of Practice G 260. This present Guideline G 464 addresses the assessment of an assumed defect; for the assessment of measured defects, the guideline can be applied analogously.

This guideline G 408 shall apply to the conversion of pipelines made from plastic to hydrogen-containing, methane-rich gases (2nd gas family) or hydrogen (5th gas family) in accordance with DVGW Code of Practice G 260 up to an operating pressure of 16 bar and ends with the main shut-off valve, the thematic threshold to DVGW Guideline G 655. This guideline G 408 can also be applied to the conversion of plastic gas pipeline operated with gases that do not conform to the specifications of DVGW Code of Practice G 260 if the gases’ specific characteristics and, if applicable, other existing regulations are taken into account. The respective guidelines on pipeline conversion shall be consulted for networks using different pipeline materials (e.g., plastic and steel).

This guideline G 407 shall apply to the conversion of pipelines made from steel to hydrogen-containing, methane-rich gases (2nd gas family) or hydrogen (5th gas family) in accordance with DVGW Code of Practice G 260 up to an operating pressure of 16th and ends with the main shut-off valve, the custody transfer point to DVGW G 600 (A), respectively to G 614.1 (A) (including the additions detailed in DVGW Guideline G 655). This guideline can also be applied to the conversion of steel gas pipeline operated with gases that do not conform to the specifications of DVGW Code of Practice G 260 when taking into account the gases’ specific characteristics and, if applicable, other existing regulations. The respective guidelines on pipeline conversion shall be consulted for networks using different pipeline materials (e.g., plastic and steel).

For hydrogen transmission within the German gas grid, it is imperative to obtain a clearly defined assessment of steel components for hydrogen suitability and relevant implementation in the DVGW Codes of Practice. Within this context, DVGW Code of Practice G 409 (for the conversion of pipelines to hydrogen transmission) and DVGW Code of Practice G 463  (for the construction of new pipelines), for example, have been specifically aligned to hydrogen as a transmission medium. Both these codes of practice may require a fracture-mechanical assessment of pipelines and pipeline components, with fracture-mechanical parameters beingrequired as input variables. So far, it was only in ASME B 31.12 [3] that these parameters were specified in an international code of practice. They specifically involve minimum fracture toughness (KIc) and the description of crack toughness (da/dN) with hydrogen as a medium. However, the parameters specified in ASME B 31.12 were based on investigations on US materials which are verysimilar, but not identical, to the materials used in Germany and elsewhere in Europe. Furthermore, the conversion of existing older natural gas pipelines (comprising older materials) is of very considerable interest particularly for the scope of application of the DVGW Code of Practice, although a direct transferability of the US investigations was considered to be problematic. Hence, within the context of the DVGW’s extensive SyWeSt H2 research project, fracturemechanical investigations were performed specifically for the pipeline steel grades used in Germany (and, in some cases, elsewhere in Europe) with hydrogen as a medium. The objective of this project was to compare the established fracture-mechanical parameters with the results on which ASME B 31.12 is based for the purpose of validating their application to steel grades used in Germany and, where applicable, drawing up a modified correlation for crack growth.

In recent years, the relevant DVGW Codes of Practice and associated information sheets for carrying out and evaluating the above-ground inspection of natural gas pipelines have been revised. In addition, measurement technology and data processing (digitisation) have developed constantly. For the above-ground inspection of buried pipelines in the distribution network through inspections and drives, new measurement methods are increasingly being used. In the EvaNeMeL research project, these new measurement methods were evaluated both theoretically and through experimental investigations. Five vehicle-mounted measurement systems and three hand-held remote gas detection methods were investigated. The results demonstrate the performance of the novel methods against a benchmark and also to serve as a basis for a subsequent supplement to the DVGW rules and regulations for above-ground inspection. The benchmark was an experienced “Gasspuerer” (gas safety personnel) who carried out a walk-through with a probe-based PortaFID M3K in parallel to the experimental investigations. This established walk-through of buried pipelines results in a high level of safety for the public gas supply.

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.

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.