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News on the DVGW Technical Rules - GasNew publications
G 652 "Natural gas vehicle refuelling appliances and natural gas vehicle refuelling systems"
Publication date 8/11, EUR 20.59 (DVGW members), EUR 27.45 (non-members), available in German only
The new DVGW Code of Practice G 652 "Natural gas vehicle refuelling appliances and natural gas vehicle refuelling systems" covers the gap that has arisen by removing small natural gas systems for vehicle refuelling from Code of Practice G 651/VdTÜV M 510 "Natural gas vehicle refuelling stations", as the latter's requirements that clearly increased between its first and second publication cannot be met by small natural gas vehicle refuelling appliances and natural gas vehicle refuelling systems without natural gas reservoirs.
It applies to the planning, construction, equipment, installation, testing, commissioning and operation of natural gas vehicle refuelling appliances and natural gas vehicle refuelling systems, which are connected to and supplied by the public gas supply network.
It addresses both the manufacturer, who with this technical rule receives fundamental data for the design of systems and system components, and the operator for whom the minimum requirements for a safe operation are illustrated. At the same time, it serves as test specification for testing the natural gas vehicle refuelling appliance or natural gas vehicle refuelling system.
This Code of Practice demonstrates the state-of-the-art technology, which is to ensure that natural gas vehicle refuelling appliances or natural gas vehicle refuelling systems are safe to operate in the long run. As the approval and/or acceptance procedures for natural gas vehicle refuelling appliances or natural gas vehicle refuelling systems differ depending on the place of installation, manufacturer and operator should coordinate their efforts in good time. In addition, it should be noted that the quality of the natural gas in the network does not yet comply nationwide and at all times with the requirements of standard DIN 51624, which are stricter compared to those of Code of Practice G 260, and with which the natural gas must comply when it is dispensed to a vehicle.
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Translations
G 459-1 English "Gas service lines for operating pressures up to 4 bar; design and construction"
Publication date 7/98, EUR 27.61 (DVGW members), EUR 36.82 (non-members)
This is the English translation of Code of Practice G 459-1 "Domestic gas service connections for operating pressures up to 4 bar; planning and construction", 07/1998. This edition is only available as PDF download.
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G 459-1-B1 English "Supplement G 459-1 Gas service lines"
Publication date 12/03, EUR 15.97 (DVGW members), EUR 21.29 (non-members)
This is the English translation of supplement 1 to Code of Practice G 459-1 "Domestic gas service connections", 12/2003. This edition is only available as PDF download.
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G 465-1 English "Inspection of gas pipework systems with operating pressures up to 4 bar"
Publication date 11/97, EUR 20.59 (DVGW members), EUR 27.45 (non-members)
This is the English translation of Code of Practice G 465-1 "Inspection of gas pipework systems with operating pressures of up to 4 bar", 11/1997. This edition is only available as PDF download.
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DIN Standards
DIN EN 1458-1, draft standard "Directly gas-fired domestic tumble dryers model B22D and B23D with nominal thermal load not exceeding 6 kW - Part 1: Safety"
Publication date April 2011, price group 31, German version FprEN 1458-1:2011
Please send your objections to nagas@din.de by 1st October 2011.
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DIN EN 1458-2 draft standard "Directly gas-fired domestic tumble dryers model B22D and B23D with nominal thermal load not exceeding 6 kW - Part 2: Economic power management"
Publication date April 2011, price group 6, German version FprEN 1458-2:2011
Please send your objections to nagas@din.de by 25th September 2011
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DIN EN 16304 draft standard "Automatic pressure relief valves"
Publication date July 2011, price group 12, German version prEN 16304:2011
Please send your objections to nhrs@din.de by 4th September 2011
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DIN EN 14141 draft standard "Valves for the transport of natural gas in long-distance pipelines - requirements on serviceability and its testing"
Publication date August 2011, price group 18, German version prEN 14141:2011
Please send your objections to nagas@din.de by 29th October 2011
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DIN EN 16314 draft standard "Gas meters - additional functions"
Publication date September 2011, price group 26, German version prEN 16314:2011
Please send your objections to nagas@din.de by 5th November 2011
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DIN 3537-1 "Gas isolating valves up to 5 bar for the domestic gas installation - requirements and tests"
Publication date September 2011, price group 15
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DIN 51855-1 "Testing of gaseous fuels and other gases - Determination of the sulphur compound content - Part 1: Area of application, definitions"
Publication date September 2011, price group 5
We envisage incorporating the draft standards into the DVGW Technical Rules on Gas. The standards form part and parcel of the DVGW Technical Rules on Gas.
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Withdrawals
DIN 3446 "Electric ignition devices for gas burners"
Publication date August 1983
This standard has been withdrawn without substitution.
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News on the DVGW Technical Rules - Gas/WaterNew publications
GW 134 "IT-supported maintenance under integration of GIS"
Publication date 8/11, EUR 27.61 (DVGW members), EUR 36.82 (non-members), available in German only
In modern asset management systems, condition-based maintenance has become a fixed component of the maintenance strategy. The DVGW body of rules and regulations adequately accommodates this development with the definition of maintenance-relevant data (see DVGW Code of Practice G 402 and W 402), especially since the IT-tools required for this purpose are already available.
Companies make use of different software solutions, which in some cases are still operated separate from each other. However, with regard to data management and data processing, these must be coordinated when a consistent IT-supported maintenance process is to be introduced in the enterprise. In this context, process-oriented approaches seem the most suitable bases for defining the necessary specifications applying to the data management, processing and evaluation of each of the different IT solutions (e.g. ERP, GIS and pipeline network monitoring applications). In practical experience it has proven of value to graphically depict the results with the aid of geographic information systems and to derive further steps from this.
DVGW technical standard GW 134 shows ways for the conceptional implementation of an IT-supported maintenance under inclusion of geographical information systems, which are to serve as orientation for planning and implementing company-specific solutions. In addition, the DVGW bodies of rules and regulations containing maintenance-specific specifications are presented in table form in GW 134.
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News on the DVGW Technical Rules - WaterNew publications
W 122 "Closing structures for water catchment wells"
Publication date 8/11, EUR 27.61 (DVGW members), EUR 36.82 (non-members), available in German only
In 1979, the DVGW body of rules and regulations for the first time dealt with "Closing structures for drilled wells". The edition of 1998 was converted into W 122. Since that time, the technical and material-specific requirements have clearly been enhanced so that a basic revision of W 122 had become necessary. Apart from taking into account the hygienic requirements on the materials used that come into contact with the untreated water, the constructional principles were also subjected to scrutiny. In the process, apart from operational requirements, flood water protection and the protection of the system against third-party damage have been awarded greater importance compared to the 1998 version. Prefabricated concrete and reinforced concrete components as well as complete prefabricated manholes and inspection chambers are increasingly used in building construction for cost reasons. Corresponding recommendations in this regard were included to ensure their proper function during operation. As in the last version, the informative annex contains examples of the different designs which may be used as basis for planning.
Objection period ends on 01/12/2011
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W 249, draft version "Elimination of arsenic, nickel and uranium during water treatment"
Publication date 9/11, EUR 20.59 (DVGW members), EUR 27.45 (non-members), available in German only
Occasionally, arsenic, nickel and uranium in water that is used for drinking water abstraction reach concentrations which may require the elimination of these substances. With the amended Drinking Water Ordinance that will come into force on 1 November 2011, the limits for arsenic (10 µg/l) and nickel (20 µg/l) which are already valid today are supplemented by a limit of 10 µg/l for uranium. This Code of Practice describes the most important regulations that have to be taken into account for assessing the necessity of technical treatment measures to reduce the concentration of these substances and for the selection of suitable treatment measures. It is assumed that measures have been examined and if necessary taken to prevent or minimise the introduction of such substances into the water and that these measures have not been successful. Such measures are referred to in the Code of Practice, but are not dealt with in detail.
This Code of Practice was prepared by the project group "Elimination of anorganic substance"" in the Technical Committee "Water treatment methods". It serves as basis for the elimination of arsenic, nickel and uranium within the scope of central drinking water treatment. It can analogously be used for small units according to DIN 2001. The Code of Practice does not apply to water treatment in drinking water installations. For disposal of the arising residues, reference is made to the Code of Practice series DVGW W 221.
Objection period ends on 15/12/2011
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W 616 "Sensor-supported operation monitoring of pump systems in the drinking water supply"
Publication date 8/11, EUR 20.59 (DVGW members), EUR 27.45 (non-members), available in German only
The technical standard W 616 is applicable for the planning and use of sensor-supported monitoring facilities for centrifugal pump systems in the drinking water supply. To ensure a reliable and economic operation of pump systems, sensor-supported operation monitoring is becoming increasingly more important. It may have the following objectives:
 | Process monitoring, process control and process automation | | | Ensuring an operation in accordance with the regulations | | | Availability and process security | | | Safeguarding of energy-saving operating modes | | | Resource-saving operation and optimisation of life cycle costs of pumps and systems |
The information gained with the aid of sensor-supported operation monitoring forms an important basis for condition diagnoses (condition recording and comparison with reference values), early detection of malfunctions and a condition-based maintenance.
The information in technical standard W 616 is to assist users with the efficient use of modern sensor technology. Possible strategies for sensor-supported operation monitoring are described. In addition, essential measurements that are important for operation monitoring as well as suitable measurement positions are dealt with. Moreover, requirements on measuring systems are defined. The technical standard is completed with application examples and economic efficiency analyses.
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