In the field of hydraulic system assembly, the reliability of hose assemblies directly affects the safety and service life of the entire system. Among these, delamination and non-delamination are two drastically different hose pretreatment processes, often posing a challenge for technicians. This article from Liwang Fluid will comprehensively analyze the technical characteristics and applicable scenarios of these two processes, providing professional reference for hydraulic system designers and maintenance personnel.
Rubber stripping process: This refers to completely removing the outer rubber layer from the hose end using specialized tools, exposing the inner reinforcing layer (usually a wire braided or wound layer). This process requires precise control of the stripping length, generally about 1.5 times the insertion depth of the connector. The stripped hose end has a neat, stepped transition, ensuring a direct and secure connection between the connector and the reinforcing layer.
No-stripping process: This retains the complete outer rubber layer of the hose, achieving a connection through a special connector design. This process relies on the compression deformation of the rubber layer by the connector to achieve a sealing and securing effect. Modern no-stripping technology has evolved to withstand working pressures up to 3000 PSI.
1.2 Technical Advantages of the Two Processes
Hose assemblies using the stripping process exhibit significant mechanical performance advantages: Pull-out strength increased by 30-40%; test data shows that the pull-out force of the joint after stripping generally reaches over 80% of the hose burst pressure; Extended pulse life; in dynamic pressure testing, the number of pulses in stripped assemblies can be 2-3 times higher than in non-stripped products; Improved sealing reliability; direct metal-to-metal contact eliminates the risk of seal failure due to rubber aging.
The non-stripping process demonstrates unique value in specific scenarios: Installation efficiency increased by 50%; eliminating the stripping step significantly shortens assembly time; Reduced equipment investment; no need to purchase expensive stripping equipment; Enhanced environmental adaptability; the complete outer rubber layer provides better corrosion protection.
1.3 Application Scenarios for Selection
Scenarios where stripping technology is mandatory:
√ Systems with operating pressures exceeding 3000 PSl
√ Circuits with high-frequency pressure pulsations
√ Connections of safety-critical components
√ Applications with an expected service life exceeding 5 years
Scenarios where non-stripping technology can be considered:
√ Low-pressure lubrication or return oil pipelines
√ Temporary repairs and emergency replacements
√ Applications with limited installation space
√ Connection points requiring frequent replacements Stripping and non-stripping technologies each have their own technical characteristics and applicable fields. When selecting, pressure rating, dynamic characteristics, environmental conditions, and cost factors should be comprehensively considered. Liwang Fluid recommends that engineers prioritize stripping technology in critical areas, while non-stripping solutions can be evaluated for secondary circuits.