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You are here: Home1 / Blog2 / LPG Everyday3 / LPG in Commerce4 / When do I have to replace stainless steel gas hoses in LPG systems?

When do I have to replace stainless steel gas hoses in LPG systems?

1. June 2020/in LPG Everyday, LPG in Commerce, LPG in Private Housholds

Inhaltsverzeichnis

  • Replacement period conventional hoses
  • Replacement period for a stainless steel hose?
  • Different standards
  • Summary – Conclusion
Approximate reading time: 4 minutes

In order to connect a gas stove in the household or in a large kitchen with a gas cylinder or a pressure reducer, hose assemblies made of stainless steel (metal corrugated hose, stainless steel corrugated tube) or metal braided corrugated pipes are used sometimes. This raises the question whether the usual replacement period also applies here.

As before, the orange gas hose is still dominating in LPG systems with propane, butane and mixtures of the two. These hose assemblies are either made of rubber or plastic and are generally very durable – despite very intensive and hard-wearing use in some cases.

This is what the standard hose assemblies for propane and butane look like: on the left, the version made of rubber, on the right, the version made of plastic.
This is what the standard hose assemblies for propane and butane look like: on the left, the version made of rubber, on the right, the version made of plastic.

Replacement period conventional hoses

Nevertheless, they are a wear part, and thus subject to a certain ageing and must be replaced at regular intervals in order to minimise the potential hazards due to gas leakage. The Technical Rules for LPG (TRF) define the replacement period for gas hoses (hose assembly) for household applications. After ten years from the date of manufacture (see inscription or hose tag) the hoses have to be replaced, according to the TRF! For commercial applications, the valid DGUV V 79 stipulates a replacement period of eight years.

https://youtu.be/nSkqgax_OnI

Replacement period for a stainless steel hose?

In addition to the orange hose assemblies made of rubber and plastic, stainless steel hose assemblies are suitable and used for LPG systems. GOK offers them, among other things, as part of a kit to connect the gas stove or as a so-called all-gas hose for the gas socket. Of course, after ten years at the latest, the question arises whether the replacement periods from the TRF also apply to the stainless steel gas hoses. The short answer is: No!

  What should I pay attention to when installing and operating a propane-powered gas stove at home?

Different standards

In a little more detail: The TRF require the hose assemblies which are manufactured in accordance with DIN 4815-2 or DIN 16436-2 to be replaced; in particular, these include the orange hoses made of rubber and plastic. Hose assemblies made of stainless steel, more precisely: metal braided corrugated pipes, are defined in DIN 3384 or DIN 14800. The TRF do not stipulate a replacement period for this type of hose.

Of course, this also depends on the difference in the material. While materials such as rubber or plastic are subject to ageing and wear, stainless steel is not subject to ageing, or only subject to ageing to a certain degree. The specifications of the respective manufacturer are nevertheless binding and must be complied with, if there are any.

Such ageing does not occur in the case of a gas hose made of stainless steel or a metal braided corrugated pipe, of course. Therefore, there is no replacement period for such cables.
Such ageing does not occur in the case of a gas hose made of stainless steel or a metal braided corrugated pipe, of course. Therefore, there is no replacement period for such cables.

Summary – Conclusion

This means that, after ten years, the orange hose assemblies made of rubber or plastic must be removed from household LPG systems – after eight years in the commercial sector. Gas hoses made of stainless steel do not have a replacement period and therefore only have to be replaced if a user or specialist finds a defect.

As stainless steel itself is far more expensive as raw material and is more complex in processing than rubber or plastic, the sales prices of the individual products differ. Users now have the choice – GOK has both solutions in the range.

  Was ist besser: der Gasschlauch aus Gummi oder aus Kunststoff?

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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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