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3/8″ Hydraulic Hose [Hydraulic Hose Size Guide]

This is the complete guide of 3/8″ hydraulic hose, and you can get your desired 3/8″ hydraulic hose pipe from Kingdaflex. And I am happy to share with you all about the 3/8″ hydraulic hose, also 3/4″ hydraulic hose.

Table of Contents


The first important step is to determine the size of the hydraulic hose before the hydraulic hose assemblies for your hydraulic system. The hydraulic hose measurement can help you with this step.

Here are multiple sizes for a hydraulic hose that can be made during the hydraulic hose manufacturing process, and 3 8 hydraulic hose is the popular hydraulic hose size that is widely applied for various hydraulic equipment.

So here is the complete guide of the 3 8 hydraulic hose.

Let’s dive into it!

Hydraulic Hose Size Chart

hydraulic hose size chart
hydraulic hose size chart

You will see the hydraulic hose size chart while viewing the detailed page of the hydraulic hose, which is basically important for you to select your desired hydraulic hose for your hydraulic system.

A hydraulic hose size chart provides information about the various dimensions and specifications of hydraulic hoses used in different applications. Hydraulic hoses are typically categorized by their inside diameter (ID), outside diameter (OD), and working pressure. The following is a general hydraulic hose size chart that provides an overview of common sizes and their corresponding specifications:

Hose Inside Diameter (ID)Hose Outside Diameter (OD)Minimum Bend RadiusMaximum Working Pressure
1/4 inch0.50 inch2.0 inchesUp to 5,000 PSI
3/8 inch0.67 inch2.5 inchesUp to 4,000 PSI
1/2 inch0.80 inch3.5 inchesUp to 3,500 PSI
5/8 inch0.94 inch4.0 inchesUp to 3,000 PSI
3/4 inch1.10 inch4.8 inchesUp to 2,250 PSI
1 inch1.44 inch6.0 inchesUp to 2,000 PSI
1-1/4 inch1.75 inch7.9 inchesUp to 1,250 PSI
1-1/2 inch2.07 inch9.0 inchesUp to 1,050 PSI
2 inch2.63 inch12.0 inchesUp to 900 PSI

Keep in mind that this is a general guide and the actual specifications of hydraulic hoses can vary based on factors such as the hose material, reinforcement layers, and specific manufacturer guidelines. It’s important to refer to the manufacturer’s documentation and specifications for accurate information regarding hydraulic hose sizes and usage. Additionally, working pressures can vary based on the type of fluid being conveyed and other operating conditions. Always ensure that you are using the right size and type of hydraulic hose for your specific application to ensure safety and optimal performance.

Here are some specifications of hydraulic hose sizes you can read from the hydraulic hose size chart:

size of hydraulic hose
size of hydraulic hose
  • Outer diameter (O.D.) measures the entire span of the hydraulic hose cross-section, including the tube, reinforcement, and cover. The difference between the O.D. and I.D. is the thickness of the hose wall. Outer diameter is important for sizing the hydraulic hose to match the proper hydraulic hose fittings and other components for hydraulic hose assemblies.
  • Inner diameter (I.D.) is the span of the empty space in a circular hydraulic hose cross-section that affects the flow velocity of the hydraulic fluid within the hose. Wider hydraulic hose inner diameter can get the hydraulic fluid flow slower, so a hose hydraulic with an oversized I.D. will cause sluggish system performance, while an undersized I.D. can cause excessive pressure drops, leaks, and system damage.
  • The thickness of the hydraulic hose is that: The result equals to outer diameter minus inner diameter, and thickness includes inner synthetic rubber layer, steel wire reinforcement layer, and outer synthetic rubber layer. (Related: What Is Hydraulic Hose Is Made of)
  • Wire O.D is the span of the inner tube and reinforcement of the hydraulic hose cross-section, and the raw material, synthetic rubber, is much better than the over, and it can determine the quality of the hydraulic hose. So we use the top-rated synthetic rubber to create this part to work out the best hydraulic hose with high strength and durability.
  • The length of the hydraulic hose defines its maximum reach between end-points. Increasing length can also increase the pressure drop in the system because hose length is a function of head loss due to friction.

3/8″ Hydraulic Hose

3 8 hydraulic hose
3 8 hydraulic hose

3 8 hydraulic hose, 3/8 hydraulic hose, 3/8″ hydraulic hose is the hydraulic hose with 3/8″ (I.D) inner diameter. This size is the most popular, can be applied widely for various hydraulic equipment and machine.

All of the hydraulic hoses can be manufactured with a 3/8″ diameter, you can get your desired 3 8 hydraulic hose for your hydraulic system.

What Is Dash Size?

hydraulic hose dash size
hydraulic hose dash size

What is the dash size in the hose?

I believe that this is the asked frequently question for the hydraulic hose starters.

The dash size is also the method to measure the hydraulic hose size, and the dash size can be converted to inches.

hydraulic hose dash size conversion table
hydraulic hose dash size conversion table

Here is the hydraulic hose dash size conversion table, you can calculate the dash size to inches.

Simply put, the dash size equals an I.D. of a hydraulic hose in 1/16″ increments. For example, a -06 hose would indicate a hose with an I.D. of 6/16″ – or 3/8″.

The hydraulic hose is measured by inside diameter, you need to use the vernier caliper to measure the hydraulic hose, and then get the dash size.

Some Popular Hydraulic Hose Sizes

Besides the 3/8″ hydraulic hose, there are many other popular hydraulic hose sizes widely applied for the hydraulic industry.

3/4″ hydraulic hose

3 4 hydraulic hose pipe
3 4 hydraulic hose pipe

PS: You can read the hydraulic hose inner diameter scale from the cover of the hydraulic hose because we hydraulic hose manufacturer will print some basic specifications on the surface of the hydraulic hose, get to know the hydraulic hose standard, diameter, etc.

3/16″ hydraulic hose

So now is the time for you, to read the hydraulic hose size chart. Finally, if you have any questions about the hydraulic hose sizes, please ask us at any time.

What Size Hydraulic Hose Do I Need

Selecting the correct size for a hydraulic hose is crucial for efficient system performance. Using the wrong size can lead to reduced performance and potential system failures. Here are some factors to consider when determining the size of the hydraulic hose you need:

  • Flow Rate (Q): Determine the hydraulic hose flow rate in your system, usually measured in gallons per minute (GPM) or liters per minute (LPM). The inside diameter (ID) of the hose should be sized appropriately to maintain the desired flow rate without causing excessive fluid velocity.
  • Velocity: Ideal fluid velocity varies based on the application. For instance:
    • Suction lines: 2-4 feet per second (FPS) or 0.6-1.2 meters per second (MPS)
    • Return lines: 10-15 FPS or 3-4.5 MPS
    • Pressure lines (up to 500 PSI): 10-15 FPS or 3-4.5 MPS
    • Pressure lines (500-2000 PSI): 15-20 FPS or 4.5-6 MPS
    • Pressure lines (2000+ PSI): 20+ FPS or 6+ MPS
  • Pressure Rating: The hose pressure rating should have a working pressure rating that exceeds the maximum pressure of your system, including any potential pressure spikes.
  • Burst Pressure: This is typically 4x the working pressure of the hose. It’s the pressure at which the hose is expected to rupture.
  • Temperature: Ensure the hose can handle both the operating temperatures of the fluid and the external environmental temperatures to which it will be exposed.
  • Bend Radius: Ensure the hose you select can be routed without exceeding its minimum bend radius.
  • Compatibility: The hose material should be compatible with the hydraulic fluid used in your system.
  • Connections and Fittings: Ensure that the hose can be securely connected to your equipment. This often means matching the hose end fittings or adapters to your equipment’s port or connection style.
  • Hydraulic Hose Application: Consider the conditions the hose will be exposed to. For instance, hoses used in mobile applications may require more flexibility and abrasion resistance than those used in stationary applications.
  • Safety Factor: It’s good practice to choose a hose with a little extra capacity beyond your calculated needs, offering a buffer in case of unexpected conditions or changes in the system.

Once you’ve considered these factors, consult hydraulic hose specification sheets, manufacturer guidelines, or specialists to select the appropriate hose size for your application. Remember, choosing the right hydraulic hose size ensures efficient system operation, minimizes energy losses, and enhances safety.

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