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.
GW 368 Standard 02/2013
82,05 €*
The aim of this Standard GW 368 is to determine the lengths of pipeline to be locked against longitudinal forces.The Worksheet applies to ductile cast iron and steel pipes, fittings and valves. In principle, the formulaic correspondences described can also be applied to pipes in other materials. However, the properties of the other materials must be taken into account in each case, particularly specific weight and friction coefficient.
G 501 Instruction Bulletin 05/2012
64,20 €*
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.
G 402 Code of Practice 07/2011
82,05 €*
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 maintenance 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.