Large Diameter Chemical High Temperature Hose

JIDONGDA Large Diameter Chemical High Temperature Hose is a high performance flexible pipe designed specifically for extreme industrial environments, suitable for conveying high temperature and highly corrosive media. Multi-layer composite construction provides a combination of chemical resistance, heat resistance and high flexibility. These products provide an excellent alternative to rigid metal pipes and are widely used in applications such as chemical manufacturing, hazardous chemical transportation and high temperature cleaning, demonstrating reliability in the most demanding and harsh environments.

Product design and materials used

The Large Diameter Chemical High Temperature Hose has a multi-layer design, adaptable to specific requirements; the choice of materials is carried out taking into account the type of transported medium, temperature and pressure, which guarantees structural stability and reliable protection:

1. Inner layer: PTFE/FEP/EPDM (selected individually depending on the environment; corrosion resistant and permeable)

2. Reinforcement layer: High-strength fiber winding + steel wire spiral frame (ensures resistance to pressure and deformation)

3. Intermediate barrier layer: High temperature resistant composite barrier (greatly improves permeation resistance)

4. Outer protective layer: Wear-resistant and UV-resistant special material (suitable for harsh outdoor environments)

5. Connection methods: Flanges, quick couplings and non-standard interfaces (compatible with various industrial equipment)

Performance Testing and Quality Control

1. Chemical compatibility test: Immersion in sulfuric acid, hydrochloric acid, strong alkaline solutions, and organic solvents for 72–240 hours; no swelling, degradation, or leakage.

2. Thermal resistance test: Withstands temperatures from -40°C to 180°C; endures over 50 thermal shock cycles without delamination, brittle cracking, or hardening.

3. Pressure/burst test: Standard operating pressure of 0.6–1.6 MPa; burst pressure exceeds operating pressure by more than three times, ensuring a high safety margin.

4. Aging resistance test: Successfully passes UV and ozone resistance tests; no cracking or chalking occurs on the outer layer.

Practical Application Example

A major domestic metallurgical plant used standard hoses to transport high-temperature acidic coolants containing sulfuric acid. These hoses frequently cracked and leaked, resulting in equipment downtime and high annual maintenance costs.

The plant partnered with the specialized manufacturer JIDONGDA to custom-produce large-diameter (DN300) PTFE-lined hoses designed to transport aggressive media at high temperatures (165°C) and pressures (1.0 MPa). Since installation, the hoses have operated reliably for over 12 months without leaks or damage; equipment downtime has been reduced by 90%, and maintenance costs have dropped by 75%. Furthermore, the high flexibility of the hoses simplified the piping layout for the furnace equipment, significantly reducing installation complexity.

Key Application Areas

Suitable for a wide range of industrial applications involving highly corrosive media, high temperatures, and high flow rates: transport of acidic and alkaline chemicals; piping for fine organic synthesis equipment; transport of high-purity pharmaceutical media; supply of aggressive metallurgical coolants; industrial high-temperature purification systems; discharge of aggressive wastewater; and chemical transfer on ships and offshore platforms.

Key Product Advantages

1. Dual resistance to external factors: Withstands both high temperatures and severe chemical corrosion; suitable for demanding operating conditions involving mixed media.

2. High flow capacity: Large-diameter design meets industrial requirements for high flow rates, enhancing process efficiency.

3. Multi-layer permeation protection: Composite barrier structure prevents the working medium from permeating the pipe walls and extends the product's service life.

4. Ease of installation: High flexibility and ductility; replaces bulky rigid piping, reducing design and installation costs.

5. Aging resistance and durability: Suitable for long-term use in harsh outdoor environments, including exposure to high ozone concentrations and intense UV radiation.

6. Extensive customization options: Technical specifications (medium type, temperature, pressure, pipe diameter) can be tailored to specific customer requirements.

Packaging and Delivery

Industrial packaging includes a steel securing frame and a protective anti-corrosion/moisture-resistant film to prevent deformation or damage during transit. Various shipping methods are available, including sea freight, specialized project logistics, and container shipping. The standard delivery time is 10–30 days, subject to variation based on product specifications and order volume. We accept orders for the manufacture of custom-designed, non-standard products.

Frequently Asked Questions

Q1: Can this large-diameter, chemically resistant, high-temperature hose continuously transport high-temperature concentrated acid media at 170°C?

A1: Yes. For highly aggressive, high-temperature media (such as concentrated sulfuric or hydrochloric acid), we offer specialized PTFE or FEP liner formulations designed for long-term continuous operation at 170°C. These products have successfully passed immersion tests in strong acids (for 240 hours) and thermal cycling tests without showing signs of degradation or leakage. Options with EPDM liners are available for handling mildly aggressive acids and alkalis at temperatures below 120°C.

Q2: What is the maximum diameter for custom-made hoses? Are standard flange connections used?

A2: We offer custom-made large-diameter hoses (ranging from DN50 to DN600). While flange connections are standard, quick-connect couplings and threaded fittings can also be installed, allowing the hose to connect directly to equipment valves without the need for additional adapters.

Q3: What is the product's service life compared to standard hoses when used outdoors in contact with aggressive chemical wastewater?

A3: Under identical outdoor operating conditions (exposure to UV radiation and highly aggressive wastewater), JIDONGDA multi-layer composite hoses last 3–5 times longer than standard single-layer rubber hoses. Thanks to an impermeable inner layer and an aging-resistant outer layer, the product effectively prevents the penetration of the working medium as well as surface chalking and cracking, thereby significantly reducing the frequency of equipment replacement and lowering operating costs.