Corrosion resistance of high-pressure resin hydraulic pipes
In industrial hydraulic systems, ultra-high pressure resin oil pipes have gradually become a new generation solution to replace traditional rubber hoses due to their excellent oil resistance, wear resistance, and pulse performance. Its unique material structure and process design enable it to show significant advantages in the field of high-pressure fluid transmission, which is widely used in harsh working conditions such as engineering machinery, petrochemical industry and shipbuilding.
1、 Oil resistance performance: a breakthrough in molecular level protection
The inner rubber layer of the ultra-high pressure resin oil pipe is made of polymer elastic materials such as nylon and polyurethane, and the oil resistance performance is improved through molecular chain structure design. Compared with traditional rubber pipes, its oil resistance is increased by more than 5 times, and it can maintain physical stability for a long time in media such as hydraulic oil and mineral oil. For example, in hydraulic support systems, resin oil pipes need to withstand continuous erosion from high-pressure emulsions. Experimental data shows that after soaking the inner rubber layer in oil at 120 ℃ for 5000 hours, the volume expansion rate is less than 3%, far exceeding the industry standard of 15% for rubber pipes. This molecular level protective ability fundamentally solves the problems of expansion and delamination of rubber pipes caused by oil penetration.
2、 Wear resistance characteristics: revolutionary upgrade of outer material
The outer layer of the resin oil pipe is made of polyurethane elastomer, and its wear resistance is 10 times that of rubber pipes. Polyurethane materials have unique "self-healing" properties, where molecular chains can automatically recombine and fill in minor scratches on the surface. In the fully mechanized mining equipment, oil pipes need to frequently rub against metal supports. The outer wear rate of resin oil pipes is only 0.02mm/kWh, while the wear rate of rubber pipes under similar working conditions reaches 0.2mm/kWh. This difference extends the service life of resin oil pipes by 3-5 times, significantly reducing equipment downtime maintenance costs.
3、 Pulse performance: stable guarantee for dynamic working conditions
The skeleton reinforcement layer of the ultra-high pressure resin oil pipe adopts steel wire weaving or winding technology to form a three-dimensional pressure bearing structure. Taking the DN25mm specification as an example, its steel wire weaving layer has a density of 120 strands per centimeter and can withstand millions of pulse cycles under a working pressure of 42MPa. In the hydraulic impact test, the resin oil pipe completed 2 million pulse tests at 1.5 times the working pressure (63MPa) without any leakage or structural damage, while the traditional rubber pipe could only withstand 500000 times under the same conditions. This anti fatigue characteristic makes it an ideal choice for frequent start stop equipment such as excavators and loaders.
4、 Structural advantage: balance of lightweight and flexibility
The three-layer structure design of resin tubing (inner rubber layer, skeleton layer, outer rubber layer) achieves optimization of performance and weight. Its unit length weight is only 60% of the same specification rubber tube, while the bending radius is reduced by 40%. For example, a resin oil pipe with an outer diameter of 19mm has a minimum bending radius of 150mm and can easily pass through narrow spaces. This characteristic is particularly important in ship hydraulic systems - in limited compartments, resin oil pipes can reduce installation space occupation by 30% while reducing overall system energy consumption.