Gas systems
As a generally recognised rule-setter in public gas supply, the DVGW has formulated the technical requirements for access to gas networks.
The safety of gas installations requires special attention. The DVGW rules and regulations ensure that the generally recognised rules of technology are applied in practice and that a high level of safety is ensured.
The pipelines of the gas network must be maintained at regular intervals and, if necessary, rehabilitated. You will find DVGW codes of practice and standards on all these topics in this section.
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
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.
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 Technical Rule G 459‑2 applies to the design, installation, testing, commissioning, operation and maintenance of gas pressure regulating systems within the scope of DVGW Standard G 459‑1 with inlet pressures up to 5 bar1 and a maximum nominal flow rate of 200 m3/h under normal conditions for the supply of residential and office buildings, council housing as well as mixed‑use buildings and buildings housing public, cultural and commercial facilities to the extent that these are comparable to buildings of residential use with gases whose properties meet the requirements of DVGW Standard G 260, with the exception of liquefied petroleum gas (LPG)2, and which are supplied by public gas utilities. This Standard does not cover industrial production plants.
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.