Sinopulse Hose Factory Co., Ltd, as a leading industrial hydraulic hose factory, manufacturer, and supplier in China, has been focusing on manufacturing hydraulic hose and fittings for 20 years in China. Now we are very happy to introduce you to the knowledge of hydraulic hoses. here we will introduce you how to measure right diameter of hydraulic hose. If you have any needs for hydraulic hoses, you are also welcome to contact us!
Hydraulic hoses are critical components in a hydraulic system, responsible for transferring fluid power from one component to another. These hoses come in different diameters, which can affect their performance, efficiency and safety. Choosing the proper hydraulic hose diameter is critical to ensuring optimal system performance and preventing downtime due to equipment failure or safety hazards.
Hydraulic Hose Diameter
Hydraulic hose diameter is the inside diameter of a hose. Measured in inches or millimetres, it determines the maximum flow rate of hydraulic fluid through the hose. Hose diameter affects the pressure drop, which is the difference between the hose inlet and outlet pressures. Therefore, the selection of its diameter directly affects the efficiency, safety and reliability of the hydraulic system.
Hydraulic Hose ID and OD
Hydraulic hoses have an inside diameter (ID) and an outside diameter (OD). ID is the measurement of the inside diameter of the hose, while OD is the measurement of the outside diameter of the hose.
Hydraulic Hose ID
The inner diameter of a hydraulic hose is important because it determines the flow rate of hydraulic fluid through the hose. The larger the ID, the higher the flow rate, while the smaller the ID, the lower the flow rate.
Most hoses used in North America are specified with an ID in inches. for industrial hoses, it is most common to express the size directly in inch sizes. For example, a measured 3/4-inch hose ID would be designated as "3/4" or the decimal size ".75". Metric nominal equivalents can also be referenced, but keep in mind that in most cases this is only a reference. In most common hydraulic hoses, ID measurements are taken in 1/16" increments and are called "scribe sizes". For example, a hose with a 3/4 inch ID measurement would show up as "-12", the fractional numerator from 3/4″ = 12/16". 1 inch ID would be 16/16 or -16, and so on. There are notable exceptions to this designation, namely SAE 100R5, 100R14, and certain other hoses used in air brake and refrigerant applications. These are based on tube connection ID sizes and reviewing the catalogue information will help to properly
Hydraulic Hose OD
The outside diameter of a hydraulic hose is important because it determines the size of the fitting that can be used with the hose. Fittings must match the outside diameter of the hose to form a strong, leak-free connection.
When choosing a hydraulic hose, it's important to consider both the ID and OD to ensure it's compatible with your system and can handle the required flow rate and pressure.
Understanding the outside diameter of hydraulic hose is critical because it affects how the hose is routed and installed. The outside diameter determines the minimum bend radius and the amount of space needed to accommodate the hose.
The Importance of Choosing the Right Hydraulic Hose Diameter
Selecting the proper hydraulic hose diameter ensures that the fluid flow rate is adequate for the system's needs. If the hose diameter is too small, there will be too much pressure drop, leading to poor performance and increased wear and tear on system components. On the other hand, a diameter that is too large will result in unnecessary fluid flow, which can increase energy consumption and cause heating problems.
When selecting a hydraulic hose size, it is important to consider both the inside and outside diameters of the hose. It is also critical to select hydraulic hoses that meet or exceed manufacturer specifications and industry standards.
Using the wrong size or type of hydraulic hose can lead to system failure, damage or injury. Therefore, it is critical to consult a hydraulic system expert or manufacturer's specifications for guidance and advice on selecting the right size and type of hydraulic hose for your particular application!
Measuring Hydraulic Hose Diameter
Measuring hydraulic hose diameter is a critical step in sizing hoses for your hydraulic system. The following is a step-by-step guide to accurately measuring hydraulic hose diameter:
- Prepare a ruler or tape measure that measures in inches or millimetres.
- Determine the inside diameter of the hose by measuring the distance between the inside edges of the hose.
- If the hose has a cover or coating, strip it off to expose the inside diameter.
- Measure the diameter in the centre of the hose to ensure accuracy.
- If the hose has a wire braid or spiral reinforcement, measure the diameter of the reinforcement as well.
- Record the measurement in inches or millimetres according to the measurement units on your ruler or tape measure.
- Compare the measured diameter to the manufacturer's specifications to determine the appropriate hose size for your hydraulic system.
Accurately measuring hydraulic hose diameter is critical to ensuring optimum system performance and preventing equipment failure or safety hazards. If you are unsure how to measure the diameter or select the proper hose size, consult a hydraulic system expert or refer to the manufacturer's specifications for guidance.
Common size diameters of hydraulic hose hose
1. Inner diameter size diameter: the inner diameter of a high-pressure hydraulic hose usually has 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 25mm, 32mm and other specifications. Among them, the smaller inner diameter is suitable for low-pressure and medium-pressure systems, and the larger inner diameter is suitable for high pressure hydraulic hose systems.
2. Outside diameter size diameter: the outside diameter of a high-pressure hydraulic hose is usually 6mm, 10mm, 16mm, 20mm, 25mm, 32mm, 40mm and other specifications. Similarly, smaller ODs are suitable for low and medium-pressure hydraulic hose systems, and larger ODs are suitable for high-pressure hydraulic hose systems.
| Inch | mm |
| 3/16" | 4.8 |
| 1/4" | 6.4 |
| 5/16" | 7.9 |
| 3/8" | 9.5 |
| 1/2" | 12.7 |
| 5/8" | 15.9 |
| 3/4" | 19.1 |
| 1" | 25.4 |
| 1.1/4" | 31.8 |
| 1.1/2" | 38.1 |
| 2" | 50.8 |
TIPS: Size Unit Conversions: Inches and Millimetres
The Hydraulic Hose Diameter Chart provides a reference guide to the most common hydraulic hose diameter sizes and their corresponding inch and millimetre measurements. It is important to note that hydraulic hose diameter sizes may vary depending on the manufacturer and the requirements of a particular hydraulic system. Therefore, it is important to consult the manufacturer's specifications or a hydraulic system expert to determine the appropriate diameter size for your particular application!
Factors to Consider When Selecting Hydraulic Hose Diameter
There are several factors to consider when selecting a hydraulic hose diameter to ensure optimal hydraulic system performance and safety. These factors in selecting a hydraulic hose include:
Flow: The flow rate of a hydraulic system is the volume of fluid flowing through the hose per unit of time. It is critical to select a hydraulic hose with the proper ID to accommodate the desired flow rate. When the flow rate is too high, selecting too small an ID will result in a larger flow rate of hydraulic fluid through the hose, which will increase the frictional resistance of the fluid and energy loss; when the flow rate is too low, selecting too large an ID will increase the size and cost of the system. Therefore, in determining the inner diameter of the hydraulic hose, you need to fully consider the flow requirements of the hydraulic system, select the appropriate inner diameter to meet the system's operating requirements.
Flow Velocity: The velocity of fluid flowing through hydraulic hoses should be within the manufacturer's recommended range. Too high a velocity can lead to corrosion, while too low a velocity can lead to the formation of deposits or contaminants.
The relationship between the inner diameter of the hose and the flow rate and flow velocity is: A=1/6*q/v, where: A is the cross-sectional area of the hose for flow through, q is the flow rate in the tube, v is the flow rate in the hose, and usually the permissible flow rate of the hose is v ≤ 6m/s.
Pressure: Hydraulic hoses must be able to withstand the maximum operating pressure of the hydraulic system. Hoses with smaller inside diameters may not be able to withstand the required pressure, resulting in hose failure and possible damage to the system. In general, the higher the working pressure, the larger the required hydraulic hose ID. Selecting too small an ID will result in a higher flow rate of hydraulic fluid through the hose, which will increase the frictional resistance of the fluid and energy loss, reducing the efficiency of the system. At the same time, too small an inner diameter will also lead to an increase in the pressure loss of the hydraulic system, and even cause the rupture of the hose, thus affecting the safety and reliability of the system. Therefore, in determining the inner diameter of the hydraulic hose, you need to fully consider the working pressure of the hydraulic system, select the appropriate inner diameter to ensure the normal operation of the system!
Temperature: The temperature of the hydraulic fluid affects the performance and service life of hydraulic hoses. It is important to select a hose with the proper temperature range to withstand the maximum operating temperature of the system. In a high temperature environment, the thermal expansion of the hose material will lead to the expansion of the inner diameter of the hose, which will affect the efficiency and safety of the system. Therefore, when determining the inner diameter of the hydraulic hose, it is necessary to give full consideration to the operating temperature of the hydraulic system, and select high temperature resistant hose materials to ensure the normal operation of the system.
Application: The specific application and environment of a hydraulic system will affect the selection of hydraulic hose diameter. Before selecting a hose, it is important to consider the purpose of the hose assembly. Answering the following questions may help:
- What type of equipment will the hose be used in?
- What environmental factors will the hose be exposed to?
- Are mechanical loads applied to the assembly?
- Will routing be restricted?
- Will field attachable fittings be required?
- Will the assembly be subject to wear and tear?
For example, hydraulic hoses used in harsh environments may require a larger diameter to ensure adequate flow and pressure.
Hose Length: The length of a hydraulic hose affects the flow, pressure, and speed of the system. It is important to select hoses with the right ID and length to minimise pressure drop and ensure optimum system performance.
Standards: Industry standards set specific requirements for hose construction types, dimensions, tolerances, burst pressures and pulse cycles Sinopulse hydraulic hoses meet or exceed the following standards: SAE (Society of Automotive Engineers), EN (European Standard, DIN (German Institute for Standardisation), ISO (International Organisation for Standardisation).
In summary, choosing the right hydraulic hose and industrial hose diameter requires consideration of various factors such as flow rate, speed, pressure, temperature, application, hose length and standards. It is critical to consult a hydraulic system specialist or manufacturer's specifications for guidance and advice on choosing the right hydraulic hose diameter for your particular application.