Content of DVGW G 269 Guideline 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 G 260DVGW G 264DVGW G 488     Buy DVGW G 269 Guideline You can purchase DVGW G 269 Guideline as a PDF file for immediate download. 

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 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.

GW 301 Technical Rule ‑ Standard 01/2021

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.

Final Report G 201418 06/2018 ‑PDF file‑