Flexible Metal Hose

The JIDONGDA Flexible Metal Hose serves as a key component for flexible compensation in industrial piping systems. Its design incorporates a stainless steel bellows, a metal braid, and versatile end connections, effectively addressing needs such as thermal expansion and contraction compensation, vibration damping, and the conveyance of challenging media. Outperforming traditional hoses, this product operates reliably under harsh conditions—including extreme temperatures, high pressure, and exposure to acids and alkalis—and is suitable for the safe transport of high-temperature fluids, steam, industrial gases, and chemicals, ensuring a secure connection between stationary piping and mobile equipment.

Product Construction

The JIDONGDA Flexible Metal Hose features a precision-engineered modular design; it comprises robust core components and allows for the addition of reinforcement elements to meet specific operating requirements:

1. Stainless steel bellows (core component)

Manufactured from a single piece of stock (304 or 316L stainless steel), it offers excellent flexibility and high-pressure resistance, serving as the leak-proof inner conduit for the working medium.

2. Double-layer metal braid

A dense outer braid of stainless steel wire enhances pressure resistance and burst safety, limits excessive expansion or bending, and provides protection against external mechanical damage.

3. Versatile end connections

Compatible with flanges, threaded connections, and quick-release couplings; these meet common piping system standards, ensuring seamless integration with various types of industrial equipment.

4. Additional protective layer

Protective coatings can be applied to enhance resistance to abrasive wear, severe corrosion, or salt spray, thereby extending the product's service life.

Application Areas and Implementation Examples

1. Primary Application Areas

Broad compatibility with high-temperature industrial systems, petrochemical plants, power generation equipment, marine machinery, metallurgical facilities, and HVAC systems; covers the majority of use cases for flexible connections in industrial piping.

2. Practical Implementation Examples

Example 1: Retrofitting high-temperature boiler piping at a thermal power plant

At a 25 MW thermal power plant, traditional rigid piping was replaced with JIDONGDA ultra-high-temperature metal hoses (at the boiler steam outlet sections). Rated for an operating temperature of 600°C, these products effectively compensate for thermal expansion and contraction while isolating equipment vibration. After three years of continuous operation without leaks or failures, the frequency of scheduled maintenance was significantly reduced, and the plant's operating and maintenance costs dropped by 42%.

Example 2: Shipbuilding piping project. A coastal shipyard selected JIDONGDA 316L stainless steel flexible metal hoses with an anti-corrosion coating for the main engine cooling and hydraulic systems. Thanks to a special marine-grade anti-corrosion coating, the hoses are resistant to salt spray. After two years of marine service, no rust or connection loosening was detected, effectively solving the problem of the short service life typically associated with standard hoses in marine environments.

Key Product Characteristics

1. Wide temperature range: suitable for extreme conditions—from cryogenic temperatures to ultra-high temperatures exceeding 600°C;

2. Excellent flexibility and compensation capability: absorbs multidirectional pipeline displacements and equipment vibration;

3. Reinforced double-layer braiding: high pressure resistance and reliable burst protection;

4. Stainless steel construction: resistant to acids, alkalis, and salt spray; compatible with various aggressive chemical media;

5. Fatigue resistance: designed for long-term, continuous industrial operation;

6. Fully welded, leak-proof design: significantly reduces the risk of pipeline leaks and system failures.

Customization Options

Eight customization options are available to meet specific requirements: 316L stainless steel construction, reinforced braiding for high-pressure applications, anti-static design, thermal insulation jackets, various connection types, ultra-high-temperature versions, vacuum-resistant designs, and marine-grade anti-corrosion coatings.

Key Product Advantages

1. All-metal construction suitable for operation in extreme industrial environments (high temperatures and pressures);

2. Excellent flexibility and compensation capabilities, effectively addressing pipeline deformation and vibration issues;

3. Standardized, versatile design ensuring broad applicability across various industries and compatibility with equipment from leading global manufacturers;

4. High-durability design guaranteeing stable performance and a low failure rate;

5. Proven performance: numerous successful projects and widespread adoption in the global industrial market.

Frequently Asked Questions

Question 1: How do I choose between 304 and 316L stainless steel for JIDONGDA metal hoses?

Answer: Grade 304 stainless steel offers an optimal balance of cost and performance and is suitable for moderately corrosive environments (e.g., HVAC systems, standard steam, fresh water, common gases). Grade 316L steel contains molybdenum, providing enhanced resistance to acids, alkalis, chloride ions, and seawater; it is specifically designed for aggressive environments (chemical processing, marine applications, and coastal areas exposed to salt spray).

Q2: Can JIDONGDA Flexible Metal Hoses be used in vacuum piping systems?

Answer: Yes. Our brand's specialized vacuum-resistant metal hoses feature thicker bellows and dense braiding, effectively preventing hose collapse (deformation) under negative pressure. They are suitable for vacuum systems (e.g., vacuum distillation, vacuum coating, cryogenic liquid storage) and can be custom-manufactured with vacuum-tight flanges.

Question 3: What is the product's service life under continuous industrial operation, and what are the maintenance recommendations?

Answer: When operated within rated parameters, the product has a service life of 3 to 8 years (this may vary slightly depending on the corrosiveness of the operating medium). Maintenance recommendations: avoid damaging the braid with sharp objects during installation, and strictly avoid twisting the hose body or bending it beyond the permissible minimum bend radius. When operating under high-temperature and high-pressure conditions, regularly checking the tightness of connections (every six months) can significantly extend the equipment's service life.