EN 857-2015 pdf download.Rubber hoses and hose assemblies – Wire braid reinforced compact type for hydraulic applications – Specification.
6.3 Impulse test requirements
6.3.1 The impulse test shall be in accordance with EN ISO 6803. The test temperature shall be 100 °C.
6.3.2 For type 1SC hose, when tested at impulse pressure equal to 125 % of the maximum working pressure, the hose shall withstand a minimum of 150 000 impulse cycles.
For type 2SC hose, when tested at impulse pressure equal to 133 % of the maximum working pressure, the hose shall withstand a minimum of 200 000 impulse cycles.
6.3.3 There shall be no leakage or other malfunction before reaching the specified number of cycles.
6.3.4 This test shall be considered a destructive test and the test piece shall be disposed of in accordance
with local environmental guidelines.
6.4 Leakage of hose assemblies
When tested in accordance with EN ISO 1402:2009, 8.4. there shall be no leakage or evidence of failure. This test shall be considered a destructive test and the test piece shall be disposed of in accordance with local environmental guidelines,
6.5 Cold flexibility
When tested In accordance with Method B of EN ISO 10619-2 at a temperature of -40 there shall be no cracking of the lining or cover. The test piece shall not leak or crack when subjected to a proof pressure test in accordance with EN ISO 1402 after regaining ambient temperature.
6.6 Adhesion between components
When tested in accordance with EN ISO 8033:2006, the adhesion between lining and reinforcement and between cover and reinforcement shall not be less than 2.5 kN)m.
Test pieces shall be type 5 for lining and reinforcement and type 2 or type 6 for cover and reinforcement as described in Table I of EN ISO 8033:2006.
6.7 Vacuum resistance
When tested in accordance with EN ISO 7233 the hose and hose assemblies shall conform to the values given In Table 6.
6.8 Abrasion resistance
All hose types shall be tested in accordance with Annex A.
For all hose types when tested with a vertical force of (25 ± 0,5) N the loss of mass after 2 000 cycles shall not
be greater than 0,5 g for the average value of three or more test pieces.
6.9 Fluid resistance
6.9.1 Test pieces
The fluid resistance tests shall be carried out on moulded sheets of lining and cover compound. 2 mm
minimum thickness, of equivalent cure state to that of the hose.
6.9.2 Oil resistance
When tested in accordance with ISO 1817. the lining immersed in Oil No. 3 for 168 h at a temperature of 100 ‘C shall show no shrinkage and no volume swelling greater than 25 %.
When tested in accordance with ISO 1817, the cover immersed in Oil No. 3 for 168 h at a temperature of 70 ‘C shall show no shrinkage and no volume swelling greater than 100 %.
6.9.3 Water based fluid resistance
When tested in accordance with ISO 1817. the lining and cover immersed in a test liquid made up of equal volumes of 1 ,2-ethanediol and distilled water for 168 h at a temperature of 70 ‘C shall show no shrinkage. The volume swelling shall be not greater than 25 % for lining and 100 % for cover.
6.9.4 Water resistance
When tested in accordance with Iso 1817. the lining and cover immersed in distilled water for 168 h at a temperature of 70 ‘C shall show no shrinkage. The volume swelling shall be not greater than 25 % for lining and 100 % for cover.
6.10 Ozone resistance
The test shall be in accordance with EN ISO 7326. Method I or 2. depending on the nominal bore of the hose.
There shall be no cracking and no deterioration of the cover visible under x2 magnification.
7 Designation
Hoses shall be designated as the following example.
Designation of a Type 1SC hydraulic hose with wire braid reinforcement and a nominal bore of 10:
Hose EN 857— 1SC 10
8 Marking
8.1 Hoses
Hoses shall be marked at a maximum spacing of 500 mm with at least the following information:
a) manufacturers name or identification, e.g. XXX;
b) the number of this European Standard “EN 857”;
c) type. e.g. 1SC;
d) nominal bore, e.g. 16:
e) quarter and last two digits of year of manufacture, e. g. 1Q15.
EXAMPLE XXXJEN 857/16/1 01 5.
NOTE Other information, as agreed between the purchaser and the manufacturer, may be included, if requested.EN 857-2015 pdf download