The characteristics of various materials hydraulic

The characteristics of various materials hydraulic tubing and scope
Seamless steel pipe. Oil resistance, good corrosion resistance, high pressure resistance, small deformation. Easy bending assembly, but after assembly to retain their shape for a long time, so that in the high-pressure system has been widely used. There are two kinds of cold-drawn and hot rolled seamless steel tubes. Precision cold drawn tube diameter size, uniform texture and high strength.hydraulic hose fittings  More commonly used on the 10th, the 15th outline drawn seamless tubes. Suction and return lines and other low-pressure line, allowing the use of pipe joints, the maximum working pressure of not more than 1MPa.  
Rubber hoses. A relative movement can be used for connection between components, the hydraulic system can absorb shock and vibration, and easy assembly. But hose manufacturing difficulties, short life, high into the wood, the fixed connection is generally not used. Rubber hoses are divided into two kinds of high-pressure hose and pressure hose, high pressure hose clamp with rubber oil resistant wire, wire cross-weaving and winding two kinds, generally have 2-3 layers. Multi-layered wire, the smaller the diameter, the higher the pressure resistance, the maximum working pressure up to 35MPa-40MPa, low pressure hose clamp is made ​​of rubber with canvas oil, suitable for working pressure less than 1.5MPa occasions.  
Copper. Easily bent into the desired shape, easy to install, and the wall is smooth, friction is small. However, resistance to low pressure, vibration resistance is weak, only for medium and low voltage circuit (generally pressure not greater than 5MPa). Because copper and oil exposure can accelerate the oxidation of the oil and copper than the lack, it should try to avoid using copper bamboo, usually limited to instrumentation and control devices used small diameter tubing.