Technical rule for gas installations
The Technical Rules for Gas Installations (short: TRGI ) than DVGW worksheet G 600 an important provision for the specialist trade . The TRGI regulates how gas systems must be planned, executed, serviced and maintained. All gas systems are affected. Existing systems may fall under the "grandfathering" (e.g. regulations for retrofitting a TAE ). The publisher is the German Association for Gas and Water (DVGW). The current TRGI is 2018.
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Scope and general information
The technical rules for gas installations relate to the planning, creation, modification and maintenance of gas systems in buildings and on properties that use gases from the 1st, 2nd and 4th gas families and with pressures of up to 100 mbar (low pressure) or above 100 mbar to 1 bar (medium pressure) can be operated. For gases of the 3rd gas family ( liquid gas ), the TRGI does not apply, but the TRF ( technical rules for liquid gas ).
The TRGI begins behind the main shut-off device (HAE) and ends with the discharge of the exhaust gas duct into the open.
The operator of gas systems must install and maintain his system in an operationally safe manner within the framework of a general traffic safety obligation (protective function of the state). This is i. A. is fulfilled if he observes the recognized rules of technology (general clause) that the DVGW creates with the TRGI. If the operator does not apply the TRGI, he is responsible for road safety himself and, in the event of damage, must provide evidence with the same expertise that the DVGW provided in advance with the rules.
Terms
I.a. Pressure , density , heat value , Wobbe index , ...
Piping system
Gas meter , gas flow monitor , pressure regulator , building entry, corrosion protection , TAE ...
Connection of gas appliances
Every gas consumption device (GVE) must be equipped with a thermal shut-off device (TAE). The regulation of installing a TAE in front of a gas meter or a floor penetration is not provided by the TRGI. However, the provisions of the respective responsible gas supply company (GVU) are particularly decisive here.
The “t” marking is present on all newer gas meters. The meter itself and the TAE have the same service life in the event of a fire. I.e. In the event of a fire, both the TAE and the meter are identical in terms of the timing of the undesired gas leak. A desired, more extensive protective function of the TAE can thus not be fulfilled.
Installation of gas appliances
U.A. protection goals , combustion air network , ...
Gas appliances may only be installed and put into operation by specialists entered in the list of plumbers. Exceptions: gas appliances without an exhaust system such as B. gas stove, gas grill, gas patio heater etc. with an output of up to 18 kW.
Exhaust gas routing from gas fireplaces
Classification of gas appliances:
- Gas appliance type A: without exhaust system, e.g. B. gas stoves, ...
- Gas appliance type B: with flue gas system and open flue combustion chamber. z. B. Boilers, thermal baths, water heaters ...
- Gas appliance type C: with flue system and room air-independent combustion chamber, e.g. B. Gas appliances with an air-exhaust system .
Testing of pipeline systems
Gas lines are to be checked depending on the construction progress (shell construction phase, completion, repairs).
- Load test: Here the material is checked for strength and the connections for durability; this is done before plastering or covering the gas pipes. During the load test, the newly laid pipe without fittings and without gas devices is loaded with a test pressure of 1 bar. The test medium is air or an inert gas (inert gas). No pressure drop may be detected during the test period of at least 10 minutes. The resolution of the test device is min. 0.1 bar.
- Leak test: This test determines the tightness of the line with fittings and without gas devices. With a test pressure of 150 mbar (previously 110 mbar) and a test duration (depending on the system volume) of at least 10 minutes, no pressure drop must be detectable on the measuring device, which must have a display accuracy of 0.1 mbar.
- Final inspection (visual inspection)
- Determination of usability for lines in operation.
Installation
Volumetric method; Based on the amount of gas consumed at full load of the gas appliance. A second man with a stopwatch on the gas meter is required to determine and set the flow pressure. Advantage: No manufacturer documents, no measuring device
Nozzle pressure method; U-tube manometer (or another suitable measuring device) on the gas device, flow pressure setting at full load from manufacturer's documents (manufacturer's table). Advantage: 1 man
Web links
Individual evidence
- ↑ Obligatory road safety in houses. ( Memento of the original from October 4, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Legal information on self-administration versus state requirements ( Memento of the original from September 28, 2007 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 140 kB)
