Key Points for Selecting Hydraulic Fittings

Hydraulic fittings are a type of fitting commonly used to connect metal or plastic pipes, especially in hydraulic systems, pneumatic systems, and some water systems. Here is a hydraulic fitting selection guide, selecting the right hydraulic fittings is crucial for ensuring the reliability and performance of the system.

Material Selection:

Stainless Steel. It is suitable for corrosion resistance and high temperature environments, such as food processing and chemical industries.
Carbon Steel. It is suitable for general water and gas transfer, with good mechanical strength and cost-effectiveness

Thread Size:

Usually ranging from 1/8" to 4" (NPT), including 1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4". These sizes are defined based on nominal pipe diameter.

Pressure Rating:

Common pressure ratings include 2000LB, 3000LB, 6000LB, corresponding to the use requirements of fittings under different pressures.

Connection Types:

Table 1: Forged Fitting Types and Specific Connection Method
Type	Specific Method
Hex nipple	Male thread + hexagon shape
Hex head bushing	One end female thread + one end male thread
Union	Used for rotatable thread connection
Full coupling	Both ends equipped with female threads
Half coupling	One end female thread + one end smooth or other form of interface
Boss	Conversion of pipes of different sizes or types
Swage nipple	Connecting two pipe sections of different diameters
45° elbow	Both ends have female threads, achieving a 45° directional change
90° elbow	Both ends have female threads, achieving a 90° directional change
Tee	Connection with three ports, all equipped with female threads
Cross	Connection with four ports, all equipped with female threads
Cap	Installed at the end of a closed pipe, with female thread connection
Hex head plug	Male thread + hex head plug
Square head plug	Male thread + square head plug
Round head plug	Male thread + round head plug

By following the above selection guide, you can select the forged fittings that best suit the specific application requirements. It is recommended to refer to the product specifications and performance data during the selection process to ensure that the selected fittings fully meet the technical and safety requirements of the system. If you encounter any problems that cannot be resolved, please feel free to contact us.