Hydraulic Piping Standards & Piping Manufacturer

  • img 2022-09-25
  • img

Hydraulic Piping Standards FreeImages

‍Operators must have safe and reliable hydraulic piping to operate machinery. Hydraulic systems direct pressurized liquid or gas from a source to an application or return it back to the source. Operators also need reliable standards for selecting and using hydraulic fittings, valves, hoses, and pipes.

Hydraulic system design and operation involve engineering principles with specific standards that address the quality of components and their use in safe and reliable systems. Standards are essential for specifying pressure ratings, burst strength, thermal properties, safety factors, corrosion resistance, and other operational parameters.

In this blog post, we’ll look at some common standards used by operators when designing, installing, or inspecting a hydraulic system.


Hydraulic systems use fittings and hoses to distribute pressurized liquids and gases. And the operators specify the type of fitting or hose to use at each connection in the system. Bending and fitting standards provide formulas for calculating the proper bend radius for each size of fitting.

They apply to straight long radius bends and 90-degree bends. Bending and fitting standards help operators to choose fittings that are suitable for the application and remain within the safe operating pressure limits of the system.

Fluid Ratings and Classification

Fluids flow through hydraulic systems under pressure. Pressure ratings for hydraulic fluids are determined in part by the fluid’s classification. Hydraulic fluids are classified as mineral oil, synthetic oil, or water-glycol mixtures.

Mineral oil is one of the most popular hydraulic fluids. The hydraulic fluids’ classification is Type A, B, or C. Each type of fluid has distinct properties and is rated for specific applications.

Pipe Specifications

When choosing pipe for hydraulic systems, operators must choose a pipe diameter and wall thickness suitable for the operating pressure and the service conditions of the system.

Hydraulic piping is manufactured in a variety of materials including carbon steel, stainless steel, nickel-alloy, and other special alloys.

Pipe specifications include pressure and temperature ratings, burst pressure and maximum allowable temperature under pressure.


The most common material for Precision Steel Tube is carbon steel. Stainless steel is commonly used for marine and other corrosive applications. Operators specify nickel-alloy in aggressive chemical applications where carbon steel may corrode or nickel-coated carbon steel for chemical applications.

Pipe Sizes

The size of hydraulic pipes depends on the inner diameter of the pipe and the wall thickness of the pipe. Wall thickness’ another name is the pipe’s schedule number.

Schedule Number

The wall thickness of the hydraulic pipe is commonly specified using the Schedule number of the pipe. The Schedule number is a numbering system that designates the wall thickness of the pipe.

Hose and Tube Specifications

You can use hoses and tubes to transport liquids and gases between different components in hydraulic systems. Hose and tube specifications include the type of fluid the hose is constructed to transport, the minimum burst pressure of the hose, and the maximum operating temperature of the hose.

Hose Sizes

When selecting a hose, it is important to consider the inside diameter and wall thickness. The wall thickness is the scheduled number on the hose.

Valve Standards

We can use hydraulic valves to divert and control the flow of liquid or gas through a piping system. Operators specify the type of valve to use in each connection in the system. Voltage and circuit breaker ratings for the valve help determine the wiring required for the valve.

Pressure-temperature ratings and thermal displacement help determine the operating conditions of the valve. Other standard specifications for valves include gas and air pressure rating, burst pressure, and seating torque.

Valve Sizes

When choosing a hydraulic valve, it is important to consider size and stem travel length.

Pressure-Temperature Ratings

Pressure-temperature ratings for valves indicate the maximum pressure and temperature the valve can withstand before it fails to seal properly.

Burst Pressure

Burst pressure for valves indicates the maximum pressure required to overcome the spring and open the valve at zero flow.

If the pressure required to open the valve exceeds the burst pressure, the valve may rupture or explode.

Seating Torque

Seating torque for valves indicates the amount of force required to close the valve against the spring.


Hydraulic systems operate equipment and machinery in many industries. Operators rely on hydraulic piping standards to design, install and inspect safe and reliable hydraulic systems.

Hydraulic piping and fittings, hoses and tubes, valves, and circuit breakers are specified based on industry standards. By understanding these standards, operators can use them to understand the design and installation requirements of hydraulic systems.