Corrugated Flexible Metal Hose

The JIDONGDA Corrugated Flexible Metal Hose series is built around a thin-walled stainless steel bellows. Its unique corrugated structure provides flexibility in both axial and lateral directions while retaining the inherent advantages of metal: resistance to high temperatures, pressure, and corrosion. Beyond merely conveying the working medium, the product's key value lies in its ability to compensate for thermal expansion, isolate mechanical vibrations, and correct installation misalignments. It serves as an essential safety component, enabling flexible connections within rigid industrial piping systems and designed for continuous, heavy-duty operation.

Product Design Features

JIDONGDA employs a seamless forming technology that ensures structural stability and superior leak-tightness. The core assembly consists of four layers, with options for customized reinforcement:

1. Corrugated Element

Manufactured from a single sheet of stainless steel (grade 304 or 316L), this eliminates risks associated with welded seams and significantly enhances the hose's flexibility and compatibility with various media.

2. Reinforcement Layer (Metal Braid)

An outer wire mesh sheath (stainless steel) that effectively limits elongation, distributes pressure loads, and increases overall pressure resistance.

3. End Connection System

Supports various connection types—flanged, threaded, compression fittings, and welded joints—allowing for integration into a wide range of piping systems.

4. Optional Protective Layer

Special protective reinforcement options are available for demanding operating conditions (e.g., marine environments, handling of aggressive substances, or high-temperature applications).

Key Application Areas

The Corrugated Flexible Metal Hose adapts to various industrial piping scenarios, offering high versatility and practicality:

1. Industrial piping vibration compensation systems: Absorbs thermal expansion and contraction while dampening equipment vibration during operation;

2. Petrochemical industry: Suitable for transporting corrosive media and providing flexible connections in process piping;

3. Power generation systems: Used to reduce and compensate for vibration in boilers, heat exchangers, and cooling circulation piping;

4. Marine engineering: Isolates vibration in shipboard piping and withstands corrosion from salt spray in marine environments;

5. High-temperature metallurgical equipment: Suitable for high-temperature furnaces and piping connections subject to alternating high and low temperatures;

6. Building HVAC systems: Provides flexible connections in HVAC systems, reducing piping vibration and noise.

Practical Application Examples

Example 1: High-temperature process piping project at a coastal oil refinery

A coastal oil refinery faced issues with frequent thermal displacement and flange connection leaks in high-temperature oil and gas piping caused by prolonged temperature fluctuations. The project utilizes a JIDONGDA 316L stainless steel corrugated flexible metal hose, which effectively compensates for thermal deformation and resists sulfide corrosion. The system operated continuously for five years without leaks, significantly reducing the frequency of maintenance shutdowns and enhancing the stability of the production line.

Example 2: Piping upgrade project for a large container ship

The main engine cooling piping on an ocean-going vessel suffered from wall cracking and a reduced service life due to constant vibration. To address this issue, custom-made JIDONGDA corrugated hoses—featuring double-layer braiding and a marine-grade anti-corrosion coating—were installed. This solution effectively eliminated piping resonance and ensured corrosion resistance against marine salt spray, extending the piping's service life from three years to over ten years.

Key Product Features

1. Highly flexible corrugated design with excellent axial and lateral deformation capabilities, suitable for challenging installation conditions;

2. Exceptional thermal resistance, capable of withstanding extreme cyclic thermal loads;

3. High corrosion resistance, compatible with the transport of most industrial media;

4. Effective vibration damping and displacement compensation, reducing stress within the piping system;

5. Stable and durable construction, designed for long-term continuous operation in industrial environments;

6. Reliable connection sealing, significantly reducing the risk of pipeline leaks.

Custom Configuration Options

Adaptable to specific operating conditions: all-316L stainless steel construction, double-layer reinforced braiding, anti-static design, thermal insulation jacket, various connection types, marine-grade anti-corrosion coating, ultra-high temperature versions (exceeding 600°C), and vacuum-reinforced designs.

Key product advantages

1. All-metal flexible connection, offering significantly higher reliability than traditional rubber hoses and eliminating issues related to aging or failure;

2. Integrated displacement compensation and vibration dampening capabilities, adaptable to complex piping conditions;

3. Withstands extreme temperatures and pressures; suitable for a wide range of applications;

4. Complies with major industrial standards and is universally applicable across various industries;

5. High safety factor design ensuring stable operation and controlled risk;

6. Widely used globally across diverse scenarios with a proven track record in industrial applications.

Frequently Asked Questions

Q1: How do I choose between 304 and 316L corrugated flexible metal hoses? What is the difference?

Grade 316L contains molybdenum, providing enhanced resistance to chloride ions, acids, alkalis, and sulfides; it is specifically designed for highly corrosive environments, such as marine/coastal settings or chemical processing plants. JIDONGDA can provide precise material selection recommendations based on the specific operating environment, temperature, and service conditions.

Q2: Can the product withstand high temperatures and high pressure simultaneously?

A: Yes, it is designed to operate under simultaneous high-temperature and high-pressure conditions; however, please note that the material's allowable working pressure decreases as the temperature rises. Therefore, operating parameters must be adjusted (derated) in accordance with standards when used in high-temperature environments. For ultra-high-temperature (above 600°C) and high-pressure conditions, we recommend using JIDONGDA's specialized ultra-high-temperature version to ensure long-term operational safety.

Q3: What is the product's service life, and which elements require regular inspection?

A: Service life depends on operating conditions; When used in standard heating systems, the product has a service life of 10–15 years; however, for pipelines connected to equipment that generates high-frequency vibration, replacement every 3–5 years and annual inspections are recommended. During scheduled inspections, particular attention should be paid to issues such as braiding wear, deformation of the hose body, corrosion at connection points, and fluid leakage; immediate replacement is required if any damage is detected.