China DIN EN857 1SC Hydraulic Flexible Rubber Hose Suppliers - Factory High-Quality Oil Resistant Hose
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| I.D | R.O.D. | O.D | MAX W.P. | MIN B.P. | MIN B.R | WEIGHT | ||||||
| metric mm |
inch | Min | Max | Min | Max | Max | bar | psi | bar | psi | mm | kg/m |
| mm | mm | mm | mm | mm | ||||||||
| 6.3 | 1/4" | 6.1 | 6.9 | 9.6 | 10.8 | 13.5 | 225 | 3260 | 900 | 13050 | 75 | 0.18 |
| 8.0 | 5/16" | 7.7 | 8.5 | 10.9 | 12.1 | 14.5 | 215 | 3120 | 860 | 12470 | 85 | 0.21 |
| 9.5 | 3/8" | 9.3 | 10.1 | 12.7 | 14.5 | 16.9 | 180 | 2610 | 720 | 10440 | 90 | 0.26 |
| 12.7 | 1/2" | 12.3 | 13.5 | 15.9 | 18.1 | 20.4 | 160 | 2320 | 640 | 9280 | 130 | 0.34 |
| 16.0 | 5/8" | 15.5 | 16.7 | 19.8 | 21.0 | 23.0 | 130 | 1885 | 520 | 7540 | 150 | 0.44 |
| 19.0 | 3/4" | 18.6 | 19.8 | 23.2 | 24.4 | 26.7 | 105 | 1520 | 420 | 6090 | 180 | 0.54 |
| 25.4 | 1" | 25.0 | 26.4 | 30.7 | 31.9 | 34.9 | 88 | 1280 | 355 | 5100 | 230 | 0.77 |
What do I.D. and O.D. represent in the specification table?
I.D. stands for Inner Diameter, which determines the flow capacity of the fluid inside the hose. O.D. stands for Outer Diameter, representing the total thickness of the hose structure, which is vital for choosing the correct fittings and clamps.
What is the relationship between MAX W.P. and MIN B.P.?
MAX W.P. (Maximum Working Pressure) is the maximum safe pressure for continuous operation, while MIN B.P. (Minimum Burst Pressure) is the physical limit at which the hose will rupture. A standard safety factor of 4:1 is typically maintained between burst pressure and working pressure.
Why is the Minimum Bend Radius (MIN B.R) critical for installation?
The Minimum Bend Radius indicates the tightest curve a hose can make without kinking or damaging the inner reinforcement structure. Bending the hose beyond this limit will significantly reduce its working lifespan and restrict fluid flow.
How does the size of the hose affect its pressure rating?
Generally, as the inner diameter (I.D.) of the hose increases, the maximum working pressure rating decreases. For example, the 1/4" (6.3mm) hose can handle up to 225 bar, whereas the larger 1" (25.4mm) hose has a maximum working pressure limit of 88 bar.
What does R.O.D. specify in the table?
R.O.D. stands for Reinforcement Outer Diameter. It measures the diameter of the hose over the reinforcing steel wire or textile braid before the final outer rubber cover is applied, which is essential for crimping specifications.