Will Thermoplastic Hydraulic Hose SAE 100 R7 Bulge Under Normal Working Conditions?

Fully qualified Thermoplastic Hydraulic Hose SAE 100 R7 manufactured to standard specifications will never form bulges, local protrusions or shape deformation under rated operating conditions. It maintains a straight, smooth and stable profile at all times. This reliable dimensional stability derives from its precise composite structure and stable material properties, representing a core indicator of its dependable performance.
Thermoplastic Hydraulic Hose SAE 100 R7 features an integrated three-layer co-extruded composite structure. The inner tube is constructed from oil and corrosion-resistant thermoplastic nylon with high sealing performance and structural strength. The middle load-bearing reinforcement layer consists of tightly woven high-strength synthetic fibers with uniform weaving density, which evenly disperses internal hydraulic pressure to prevent localized stress concentration. The outer layer is a high-toughness polyurethane protective cover that closely adheres to the inner layers to fix, protect and shape the whole hose. The three layers are fused under high temperature and high pressure without internal gaps or delamination, delivering excellent structural integrity. Within the rated working pressure and standard temperature range, internal fluid pressure transfers uniformly across the entire tube wall, eliminating localized compressive expansion and bulging deformation.
The hose structure remains deformation-free during continuous equipment operation, repeated start-stop cycles, frequent bending and machine vibration under regular working conditions. It keeps a neat shape without bulges, bumps or partial expansion, whether bearing static pressure at rest or dynamic pressure during movement. In addition, the hose material has outstanding fatigue resistance. It can withstand repeated pressure shocks over long-term operation without structural loosening or interlayer separation that causes bulging, granting it a far longer fatigue service life than ordinary hoses.
It is critical to clarify that all hose bulging issues stem from abnormal operating conditions rather than inherent product defects. Common triggers include long-term operation beyond rated pressure, severe pipe bending or crushing, improper fitting installation, inner tube damage from medium corrosion, hose aging and heavy external compression. Under such abnormal circumstances, uneven local stress, inner tube rupture and interlayer delamination will lead to bulging failures. As long as the hose is operated within standard parameters and installed properly without overloading or out-of-range use, Thermoplastic Hydraulic Hose SAE 100 R7 completely avoids bulging and delivers ultra-stable operation for all continuously running hydraulic systems.