Metal hoses, widely used in industries such as machinery, chemicals, petroleum, metallurgy, and food, are primarily constructed from austenitic stainless steel. This material ensures excellent temperature and corrosion resistance, allowing the hoses to withstand harsh environments when the appropriate stainless steel grade is selected for specific media. However, despite their durability, hydraulic metal hoses can still suffer premature damage due to several factors. Below are the key reasons behind their failure and recommendations to extend their service life.
1. Detachment of the External Steel Wire Mesh
The outer steel wire mesh plays a critical role in reinforcing the hose and distributing pressure evenly. Damage often occurs when the integrated welding process between the internal metal bellows, end connectors, and external mesh is improperly executed. If welding is incomplete or lacks precision, the mesh may detach under operational pressure, leading to immediate failure.
Preventive Measure:
To avoid this issue, rigorous quality control is essential. All hoses must undergo **air-tight and hydraulic pressure tests** before leaving the factory. These tests ensure the structural integrity of the welded components under simulated working conditions.
2. Weld Cracks in the Internal Metal Bellows
The metal bellows inside the hose are susceptible to damage if welding defects exist. Poorly executed or incomplete welds along the seams of the bellows can rupture under sustained pressure, causing leaks and rendering the hose unusable. This is often attributed to insufficient welding expertise or oversight during manufacturing.
Preventive Measure:
Strict adherence to welding standards and thorough inspections are crucial. Advanced welding techniques and skilled labor can minimize weak points in the bellows structure.
3. Improper Handling During Transport and Installation
Even high-quality hoses can be compromised by physical damage during transit or installation. External impacts, exposure to sharp objects, or welding spatter during installation can puncture the bellows or weaken the wire mesh.
Preventive Measure:
Packaging:Use protective materials to shield hoses from impacts during transportation.
- Installation: Avoid exposing hoses to welding sparks or abrasive environments. Ensure proper alignment and avoid over-bending.
Conclusion
Hydraulic metal hoses are vital components in industrial systems, but their longevity depends on precise manufacturing, rigorous testing, and careful handling. At Hainar Hydraulics, we prioritize quality at every stage—from material selection and welding processes to final inspections. Our hoses undergo multiple pressure tests to guarantee reliability, and we provide guidelines for safe installation and maintenance.
For more technical insights or to explore our range of corrosion-resistant, high-pressure metal hoses, visit www.hainarhydruulics.com or contact our engineering team today.
Post time: Apr-28-2025