190 G www.stauff.com/4/en/#190 Catalogue 4 § Edition 06/2023 Technical Appendix Pressure and torsion load incorrect incorrect Tensile stress correct correct Fig. 1 Fig. 2 Correct Installation Techniques Avoid twisting the hose. Hoses must be installed in such a way there is no resultant tensile stress except from the own weight of hose (see Fig. 1). Wherever possible, hoses should be installed in accordance with their natural position, whereby the bending radius must not be less than the minimum permitted bending radius (see Fig. 2). Hose assemblies – requirements, installation according to DIN 20066 Hose assemblies must conform to the requirements of the relevant hose and hose connector standards. However, if the hose and the hose connectors have different nominal pressures, only the lower nominal pressure may be used as the maximum permitted working pressure. All hose connectors used must conform to the requirements of the dynamic pressure test as per ISO 6803 when interconnected with the hoses to be used in the application. Hose connectors must conform to the requirements stipulated in DIN 20066 Part 1. Ready assembled hose assemblies must not display any defects during a test in accordance with ISO 6803. Temporary drip formation between the insert and the socket is permitted during a pressure test with the prescribed test pressure. All hose assemblies must display the markings of the hose manufacturer, the date of manufacture (year and month) and the max. permitted working pressure for the assembly.
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