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You are here: Home1 / Blog2 / LPG Leisure Time3 / Gas Regulator, Gas Cylinder & more4 / Can I keep the LPG cylinder lying down when using it?

Can I keep the LPG cylinder lying down when using it?

24. October 2016/in Gas Regulator, Gas Cylinder & more, Gas Regulator, Gas Cylinder & more, General, LPG Everyday, LPG Knowledge, LPG Leisure Time

Inhaltsverzeichnis

  • Only for gas phase
  • Consequences of liquid withdrawal
  • TRF requirement for LPG cylinder
Approximate reading time: 2 minutes

Thankfully you rarely or never see it, because it’s among the most severe mistakes that you can make when handling a propane-butane mixture: tipping the LPG cylinder over, placing it lying down or turning it upside down, and trying to operate an appliance in this position.

It doesn’t matter whether you have a 5, 11 or 33 kg cylinder – tanks filled with a propane-butane mixture have two phases: liquid and gaseous. Due to gravity, the liquid phase of the medium settles at the base of the cylinder, provided the tank is upright. The gas phase is found above the surface of the liquid phase, and this makes its way into the system via the withdrawal valve and pressure regulator.

Only for gas phase

The pressure regulator, hose assembly and other fittings are only approved for operation with the gas phase. Liquid phase in the pipe system can lead to uncontrollable situations (see 1).

  Which LPG cylinders can I use inside buildings?

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Consequences of liquid withdrawal

If the gas cylinder were to be in a horizontal position during withdrawal, the evaporated liquid phase would not reach the pipe system. If this happens, two major problems may arise:

  1. The liquid gas evaporates where it never should: in the pipe system or at the consumer equipment. The transition from liquid to gaseous state involves an abrupt and drastic change in volume (volume ratio of liquid to gaseous: 1 to 260). This expansion results in an increase in pressure and the icing of the fitting, which in turn leads to the safety devices responding to prevent overpressure (OPSO – PRV). It can also be the case that the evaporation in the pipe system or at the consumer equipment causes possible damage to the appliance itself or to the environment (see vapour pressure curve). Explosions and fire are probable consequences.
  2. There are residual substances in the liquid phase. Due to the withdrawal of liquid phase, more of these particles get into the pressure regulator, pipe system and the connected fittings. Foreign bodies frequently cause defects in the fittings and the consumer unit.
  Why is a butane or propane gas cylinder never filled to 100 percent?

Aus einer liegenden Flüssiggasflasche Gas zu entnehmen, kann gravierende Folgen haben. Zudem ist es aufgrund der Vorschriften in der TRF verboten.

TRF requirement for LPG cylinder

This is why the Technical Rules for LPG (TRF 2012) under point 6.2.1 “Setting up LPG cylinders – General information” require the following: “LPG cylinders must be set up vertically for withdrawal.[…]LPG cylinders must be set up on horizontal, even ground which is sufficiently stable.”

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Approximate reading time: 8 minutes

Information regarding technical systems

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.

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