Hose line

The title of this article is ambiguous. Further meanings are listed under hose line (definition of terms ) .

A PE plastic pipe with a screw coupling

A hose line consists of a flexible hose and the fittings and hose fittings at both ends of the line, such as flanges , screw connections and special hose couplings . Some types of piping connection are also suitable for hose assemblies. Pressing processes in particular are increasingly used today. Hose lines, like pipelines, are designated by nominal size DN and nominal pressure level PN. Hose lines serve as flexible connections for fluid transfer in hydraulic and pneumatic applications.

Quality requirements

A short hose line made of corrugated pipe with a steel braid sheathing for the flexible connection of an internal combustion engine with the exhaust system

Pressure Equipment Directive

Hose lines are pipelines within the meaning of EC Directive 97/23 / EC ( Pressure Equipment Directive ). Depending on the hazard potential (criteria: maximum operating pressure, nominal diameter, gaseous or liquid fluid, fluid group), hose lines are classified in categories I to III and must be placed on the market with a CE mark. This does not apply to hose lines with only a low risk potential according to Art. 4 Para. 3 of the Pressure Equipment Directive.

business

Industrial Safety Ordinance

Due to pressure pulses, wear and tear, aging and damage, hose lines represent particular hazards and are therefore subject to special operating regulations as specified for work equipment in the Industrial Safety Ordinance. These are, for example, the test after proper assembly and safe function and the regular recurring tests by a qualified person in terms of TRBS 1201. The test periods for the recurring tests are to be specified by the operator as part of the risk assessment or the safety-related assessment.

Hose lines must be replaced at appropriate intervals. The possible duration of use of hose lines depends to a large extent on the application and environmental conditions. Therefore, no generally applicable maximum permissible period of use can be determined by the manufacturer or others. For example, BGR 237 sets a guideline value for normal stressed hydraulic hose lines for a period of use of six years and two years for hydraulic hose lines with increased stress.

literature

• Knut Håkansson: Lexicon of the gas installation . 2nd edition, Vulkan Verlag, ISBN 3-8027-2533-6 .
• Franz A. Schneider: Die Rote Hefte, volume 7 - Extinguishing water delivery . 14th edition. Kohlhammer, Stuttgart 1994, ISBN 3-17-013208-3 , p. 46-63 .
• Günter Wossog (Ed.): Handbook of pipeline construction . 2nd edition, Vulkan Verlag, Essen 2003, ISBN 3-8027-2723-1 .
• Holger de Vries, Andreas Weich: Water pumping over long distances . 1st edition, Hüthing Jehle Rehm GmbH publishing group, Landsberg 2004, ISBN 3-609-68664-2 .

Web links

• Safe technology hose lines (accessed on May 5, 2017)
• Operating instructions for hose lines (accessed on May 5, 2017)
• Hydraulic hose lines - rules for safe use (accessed May 5, 2017)
• General operating instructions for hose lines (accessed on May 5, 2017)
• Safe handling of hose assemblies (accessed on May 5, 2017)

Individual evidence

1. ↑ Pressure Equipment Directive 2014/68 / EU. http://www.druckgeraete-online.de , accessed on January 16, 2020 .