Spiral Hydraulic Hose EN856 4SH
Structure: The hose is composed of an inner rubber layer, four sprials wire reinforcement and an outer rubber layer
Application: To transport alcohol, hydraulic oil, fuel oil, lubricating oil, emulsifier, hydrocarbon and other hydraulic oil.
Working Temperature: -40℃~+100℃
|Nominal Diameter||I.D.(mm)||W.D. mm||O.D.||O.D.||W.P.
Place of Origin: Qingdao, China
Model Number: Compact Pilot Hose PLT serious
Surface Color: BLACK, BLUE, RED, YELLOW
Certification: ISO9001:2015; TS16949; ISO14001:2015; OHSAS18001:2017
Brand Name: OEM Brand & Leadflex
Business Type: Manufacturer
Cover: Smooth & Wapped
This European Standard specifies requirements for four types of rubber covered spiral wire reinforced hydraulic hoses and hose assemblies of nominal bore from 6 to 51. They are suitable for use with :
-hydraulic fluids in accordance with ISO 6743-4 with the exception of HFD R, HFD S and HFD T at temperatures ranging from - 40 °c to + 100 °c for types 4SP and 4SH and -40 °C to +120 °C for types R12~and R13；
-water based fluids at temperatures ranging from -40° C to70° c.
-water fluids at temperatures ranging from 0 °C to +70°c 。
The Standard does not include requirements for end fittings. It is limited to the performance of hoses and hoge assemblies.
NOTE 1: The hoses are not suitable for use with castor oil based nor ester based fluids.
NOTE 2: Hoses and hose assemblies should not be operated outside the limits of this standard.
NOTE 3: Requirements for hydraulic hoses for underground mining are standardised in separate standard
Types of hose
Four types of hose are specified:
Type 4SP - a 4-steel wire apiral medium pressure hoses;
Type 4SH - a 4-steel wire aspiral extra high pressure hoses;
Type R12- a 4-steel wire spiral heavy duty high temperature hoses - medium pressure rating;
Type R13 - a multiple steel wire epiral heavy duty high temperature hoses - high pressure rating.
Materials And Construction
Hoses shall consist of an oil and water resistant synthetic rubber lining, spiral plies of steel wire wrapped in alternating.directions, and an oil and weather resistant synthetic rubber cover. Each spiral wire ply shall be separated by an insulating layer of synthetic rubber.!
3.2 Hose assemblies
Hose assemblies shall only be manufactured with those hose fittings whose functionality has been verified in all tests in accordance with this standard.
4.1 Eydroatatia requirements
4.1.1 when tested in accordance with EN Iso 1402, the maximum working pressure, the proof pressure and burst pressure of the hoses and hose assemblies shall comply with the values given in table 5.
Table 5: Maximum working pressure, proof pressure and burst pressure
4.1.2. When tested in accordance with EN ISO 1402, the change in length of hose at the maximum working pressure shall not exceed 2% to -4% for types 4SP and 4SH and ± 2 % for types R12 and R13.
5.2 Minimum bond radius
When bent to the minimum bend radius given in table 6 measured on the inside of the bend, the hose shall be capable of performing at maximum working pressure.
4.3 Impulse teat requirements
4.3.1. The impulse test shall be in accordance with 1SO 6803.The test temperature shall be 100°for types 4SP and 4SH and 120°for types R12 and R13.
4.3.2 For types 4SP and ASH hose, when tested at impulse pressure equal to 133% of the maximum working pressure, the hose shall withstand a minimum of 400 000 impulse cycles.
For type R12 hose, tested at impulse pressure equal to 133 % the maximum working pressure, the hose shall withstand aminimum of 4oo ooo impulse cycles.
For type R13 hose, tested at impulse pressure equal to 120 % of the maximum working pressure, the hose shall withstand aminimum of 500 000 impulse cycles.
4.3.3. There shall be no leakage or other malfunction before reaching the specified number of cycles.
4.3.4 This test shall be considered a destructive teat and the test piece shall be thrown away.
4.4 Lenkage of hose assemblies
When tested in accordance with EN ISO 1402 there shall be no leakage or evidence of failure. This test shall be considered a destructive test and the test piece shall be thrown away.
4.5 Cold flexibility
When tested in accordance with method B of EN 24672 at a temperature of -40°c 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 after regaining ambient temperature.
4.6 Adhesion between components
When tested in accordance with EN 28033, 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 type2 or type '6 for cover and reinforcement as described in table l of EN 28033 ;1993，
4.7. Abrasion resistance
When tested in accordance with EN ISO 6945, with a vertical force of (50 ±0, 5)N,"the loss of mass after 2 000 cycles shall not be greater than 1g.
4.8 Fluid resistance
4.8.1 Test pieces
The fluid resistance tests shall be carried out on moulded sheets of lining and cover compound,2 mm minimum thickness, of an equivalent cure state to that of the hose.
4.8.2 0il resistance
When tested in accordance with ISO 1817, the lining of types 4SP and 4SH immersed in Oil No.3 for 168 h at a temperature of 70°c shall show no shrinkage nor volume swelling greater than100%.
When tested in accordance with ISO 1817, the lining and cover of hose types R12 and R13, immersed in Oil No.3 for 70 h at a temperature of 120 °c, shall show no shrinkage nor volume swelling greater than 100% for the lining 125% for the cover.
4.8.3 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 the lining nor 100% for the cover.
4.8.4 Water resistance
When tested in accordance with ISO 1817, the lining and cover immersed in a water for 168 h at a temperature of 70 °c shall show no shrinkage. The volume swelling shall be not greater than 25 % for the lining nor 100 % for the cover.
4.9 Ozone resistance
When tested in accordance with Method 1 or 2 of EN 27326, depending on nominal bore of the hose, no cracking or deterioration of the cover shall be visible under x2 magnification.
en the purchaser and the manufacturer, can be included, if requested.