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 452‑2 Technical Rule ‑ Standard 08/2020

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.

DIN EN ISO 21809‑3 09/2020

This DVGW Standard can be used as a guideline as it summarises the minimum requirements specified in the DVGW Sets of Rules that shall be observed by design firms, specialist contractors, operators and the involved authorities during the design, construction and operation of gas pipework for the transmission of untreated or partially treated biogas. The clause on ?Design? also draws attention to the fact that the pertinent approvals and / or permissions shall be obtained prior to the start of construction of pipework planned to cross e. g. water bodies, roads and railways.Gases produced by fermentation processes such as e. g. biogases obtained from agriculture that are generally used to meet internal requirements and / or to power decentralised systems such as e. g. combined heat and power plants, are untreated or partially treated biogases that are not considered gases in accordance with DVGW Standard G 260.Nonetheless, the documents that form part of the DVGW Set of Rules that are referred to in this Standard shall also be applied to pipelines that transmit untreated or partially treated biogas.

This Code of Practice G 265‑1 serves as a basis for designing, manu‑facturing, constructing, testing and commissioning plants for upgrading biogas to natural gas quality, plants for injecting these gases into gas transmission and distribution systems, and plants for the refeeding of gas into the upstream gas supply network. This DVGW Code of Practice provides a summary overview of the minimum requirements on the technical safety of plants and components required for the utilisation of biogas, from upgrading plants through to compressor stations; pressure control, href= https://shop.wvgw.de/509052 >here. the injection into the gas supply network as added or substitute gas. At the same time, one focus was on the indispensable coordination between the ? generally different ? plant operators.

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 DVGW Guideline G 409 applies to the conversion of steel gas pipelines for design pressures of more than 16 bar with welded joints for the transmission of gases of the 2nd gas family as specified by DVGW Code of Practice G 260 to hydrogen with at least 98 % by volume (in accordance with standard ISO 14687 of Groups A or D). The design pressure DP of the pipeline remains unaffected. Details on the gas quality of the hydrogen meant for transportation will be included in DVGW Code of Practice G 260 in the near future. After the revised Code of Practice G 260 has been passed into force, it shall be the preferred standard rule for consultation on matters of hydrogen gas quality. Other installation components such as valves, pig traps, regulating stations do not fall under this Guide-line’s purview and must be examined and evaluated separately. A pipeline that transports even small amounts of hydrogen shall, if necessary, already be evaluated sepa-rately. For such cases, this Guideline’s specifications may be applied mutatis mutandis. For gas pipelines made of other material, steel pipes with detachable joints, or gas pipelines with a design pressure lower than 16 bar, this Guideline’s specifications may be applied mutatis mutandis. When planning the conversion of a gas pipeline that transports gases that do not correspond with the specifications of DVGW Code of Practice G 260, this Guideline may be applied mutatis mutandis if the specific characteristics of these gases are taken into account and other applicable regulations, if they exist, are adhered to.

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).

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 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.

G 473 Guideline 01/2018

G 497 Technical Rule‑Standard 02/2019

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.

The Instruction Bulletin G 501 defines the requirements and test criteria applying to remote gas detection integrated aboard aircraft (helicopters or airplanes) and designed to aerially monitor both buried natural gas transmission pipelines as well as above ground natural gas transmission pipelines that are suited for airborne remote gas detection, both inside and outside built‑up areas. Portable hand‑held measuring instruments or methods combined with motor vehicles shall not be dealt with in this paper, as due to their flat observation angle to the surface compared to detection from the air they are subject to modified requirement criteria. The same applies href= https://shop.wvgw.de/508585 >here.

This Code of Practice G 402 has been elaborated by the ?G 401? project group within the Technical Committee on ?Gas distribution?. It shall serve as a basis for the collection and evaluation of data to devise mainte‑nance strategies for gas distribution systems. Maintenance comprises inspection as well as service and repair activities. The respective DVGW Codes of Practice define the fundamental principles applying to inspection and service activities. This Code of Practice G 402 focuses on the collection and evaluation of data that form the main basis for repair planning. The requirement for gas distribution systems to be permanently kept in a condition guaranteeing their technical safety and reliability necessitates timely and ongoing maintenance and service activities. These activities shall be planned in advance. Maintenance strategies shall be integrated into corporate processes, the collection of major grid data being a prerequisite for introducing such strategies. Beyond this, condition‑based maintenance requires ascertaining and evaluating grid conditions by means of adequate systems. This Code of Practice describes the fundamental procedure for ascertaining, collecting and evaluating maintenance‑relevant data and offers examples illustrating how to prepare and evaluate them. This Code of Practice does not specify a standard data collection procedure for creating a planning concept in conformance with href= https://shop.wvgw.de/508331 >here.