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From what length of hose assembly do I need an excess flow device?

Category: Camping & Leisure, Grill & BBQ, Home & Commercial

Excess flow devices protect against escape of LPG if the hose assembly is damaged. GOK shows when it is mandatory.

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An excess flow device is standard in many LPG systems. We can show you from what length of hose assembly the device is required.

But from what length of the hose is it mandatory?
Automatic excess flow device

The excess flow device (EFV) prevents LPG from escaping in the event of considerable damage to the line. It is available in a manual and automatic version for the low pressure range. Only a manual version is available in the medium pressure range. Either the excess flow devices is installed between the pressure regulator and the hose assembly or between the cylinder and the hose assembly. It is generally possible to differentiate between three uses.

Private/outdoor/camping use

For example, you have a gas barbecue in use, either at home or at the campsite, or a heater that you operate with LPG? In these cases, you must use an excess flow device if the hose assembly is longer than 1.5 metres. You will find the corresponding regulation in DVGW worksheet G 612 (A).

Using an excess flow device in industry

LPG is a popular energy source especially in gastronomy, for example for the operation of outdoor heaters or roasters. As soon as you use a hose assembly in an LPG system which is used for commercial purposes, strict guidelines apply. The safety fitting is already prescribed for a hose assembly length greater than 400 millimetres (DGUV 110-010).

Using a caravan/motorhome

Case 1:
You do not operate any LPG consumer equipment while driving, but, for example, connect the outside barbecue only when you arrive at the campsite. If this is the case, the following applies:  The EFV is mandatory for a hose assembly longer than 1.5 metres(see “Private/outdoor/camping use”).

Wer seinen Caravan oder das Wohnmobil während der Fahrt beheizen möchte, der benötigt auf jeden Fall eine Schlauchbruchsicherung.Case 2:
If you are heating the caravan or motorhome while driving, you always need an excess flow device. There are usually two hose lengths for this purpose: 450 and 750 millimetres. For both hose assemblies, manual excess flow devices are pre-installed (see image on the left) and attached directly to the cylinder. You may only use a 750 millimetre hose assembly if a pull-out device is installed in the caravan or motor caravan for the gas cylinders.

 

Author

Editors GOK Blog
The articles are written by specialist authors in the fields of LPG, fuel oil, liquid media, tank management and safety engineering, who contribute their expertise from product management, development, technical customer support, training and standardisation activities. The members of the editorial team have many years of practical experience in the planning, application and further development of technical solutions for the safe supply of LPG and liquid fuels. Several authors are actively involved in specialist committees and working groups of the DVGW, DVFG and figawa, as well as in national and European standardisation committees. The team includes, among others, experts certified in accordance with G 607 and G 608, competent persons in accordance with the TRF, and specialists who contribute to the development and evaluation of technical regulations and industry standards. In addition to providing information about GOK products and solutions, the editorial team focuses on sharing knowledge relating to safety, regulations, maintenance, operation and future technologies in the field of LPG and liquid media.

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This blog will never ask members of the public or unqualified persons to make changes to or fiddle around with technical systems themselves.

In accordance with the Industrial Safety Regulation (BetrSichV), a qualified person must take care of a system which requires monitoring.

A qualified person is someone who has the specific specialist knowledge required. This knowledge is gained by way of a professional apprenticeship, corresponding professional experience or current occupational activity.

Please note that the texts are based on information, regulations and standards for Germany. Please always check the rules and regulations in the relevant country of destination and consult specialists if necessary.