Thermoplastic Hose SAE 100R7 - Medium-Pressure Oil & Water Hose from China Suppliers and Factory
 I.D
|
 O.D
|
 MAX W.P.
|
 MIN B.P
|
 MIN B.R.
|
 WEIGHT
|
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|---|---|---|---|---|---|---|---|---|---|---|
| DASH | DN | INCH | MM | INCH | BAR | PSI | BAR | PSI | MM | KG/M |
| -2 | 3 | 1/8" | 8.1 | 0.24 | 210 | 3045 | 840 | 12180 | 20 | 0.06 |
| -3 | 5 | 3/16" | 10 | 0.39 | 210 | 3045 | 840 | 12180 | 26 | 0.08 |
| -4 | 6 | 1/4" | 12.2 | 0.45 | 210 | 3045 | 840 | 12180 | 30 | 0.11 |
| -5 | 8 | 5/16" | 14.2 | 0.55 | 175 | 2538 | 700 | 10150 | 40 | 0.14 |
| -6 | 10 | 3/8" | 16 | 0.59 | 155 | 2248 | 620 | 8990 | 70 | 0.17 |
| -8 | 12 | 1/2" | 19.5 | 0.79 | 140 | 2030 | 560 | 8120 | 90 | 0.235 |
| -10 | 16 | 5/8" | 23 | 0.94 | 105 | 1500 | 420 | 6000 | 130 | 0.29 |
| -12 | 19 | 3/4" | 26.4 | 1.1 | 90 | 1300 | 360 | 5200 | 150 | 0.35 |
| -16 | 25 | 1" | 33.5 | 1.34 | 70 | 1000 | 280 | 4000 | 180 | 0.51 |
What is the relationship between Working Pressure (W.P.) and Burst Pressure (B.P.)?
The Maximum Working Pressure (MAX W.P.) is the maximum pressure at which the hose is designed to operate safely and continuously. The Minimum Burst Pressure (MIN B.P.) is the threshold at which the hose may physically fail or rupture. In this specification sheet, a safety factor of 4:1 is applied (e.g., for Dash -4, the W.P. is 210 BAR and the B.P. is 840 BAR).
How do I interpret the "DASH" sizes in the specification table?
Dash sizes represent the inner diameter (I.D.) of the hose in sixteenths of an inch. For example, a -4 Dash size corresponds to 4/16" (which simplifies to 1/4" or 6mm DN), while a -16 Dash size corresponds to 16/16" (which equals 1" or 25mm DN).
What is the significance of the Minimum Bend Radius (MIN B.R.)?
The Minimum Bend Radius is the smallest radius to which a hose can be bent without kinking, damaging the reinforcement, or restricting fluid flow. Bending the hose tighter than the specified MIN B.R. (e.g., 30mm for a 1/4" hose) will severely reduce the hose's working lifespan and safety margins.
Why does the maximum working pressure decrease as the hose size increases?
As the diameter of a hose increases, the internal surface area increases, which subjects the hose walls to greater tensile stress under the same pressure. Therefore, to maintain safety standards, larger hoses like the 1" (Dash -16) have a lower working pressure (70 BAR / 1000 PSI) compared to smaller hoses like the 1/4" (210 BAR / 3045 PSI).
Are both metric and imperial measurements provided in this specification chart?
Yes, to accommodate global engineering standards, this specification chart lists dimensions in both millimeters (MM) and inches (INCH), pressures in both BAR and PSI, and weight in kilograms per meter (KG/M).