Flexible Hose

Flexible Hose | Industrial Metallic, Shower, Gas and Ventilation Hose Lines

This industrial flexible hose range encompasses corrugated metal conduits, reinforced PVC and PU hoses, and braided plumbing assemblies built to transport liquids, gases, and air under varying pressure and thermal conditions. Manufactured from industrial-grade stainless steel, galvanized wire, and engineering polymers, these hoses provide reliable fluid and air routing for machinery, commercial plumbing, and ventilation networks while resisting kinking and mechanical wear.

Types and Product Models

Metallic Annular Corrugated Hose

Stainless steel 304 and 316 corrugated core wrapped with single or double stainless steel wire braid, engineered for high-temperature and high-pressure media transfer.

PVC Jacketed Flexible Metallic Hose

Galvanized or stainless steel core hose coated with an extruded PVC jacket, providing waterproof, oil-resistant, and corrosion-proof performance.

Shower and Sanitary Flexible Hose

Double-lock stainless steel or brass outer helix encasing an EPDM or PVC inner tube, certified for household and commercial plumbing fixtures.

Corrugated Gas Connector Hose

Annular or helical stainless steel tubing finished with safety yellow PVC coatings and precision brass end fittings for commercial and residential gas appliances.

PU and PVC Dust Extraction and Ventilation Ducting

Spring steel wire helix embedded in flexible polyurethane or polyvinyl chloride walls, offering high abrasion resistance and flexibility for sawdust, fume, and grain collection.

Construction Features

Inner Core and Tube: Extruded EPDM, PVC, or hydraulically formed thin-wall stainless steel tube serving as the primary fluid or gas containment barrier.

Reinforcement Layer: Multi-ply polyester yarn braiding, high-tensile stainless steel wire mesh, or embedded spring steel wire providing structural integrity against internal pressure and external crushing.

Outer Protective Cover: Extruded polymer jackets or metallic interlocking armor shielding internal layers from UV radiation, abrasion, and corrosive splashes.

End Fittings and Connectors: Carbon steel, brass, or stainless steel fittings including male or female threads, swivel nuts, and flanged ends permanently attached via hydraulic crimping collars.

Specifications

Technical Parameter	Metallic Corrugated Hose	PVC and PU Ventilation Duct	Shower and Sanitary Hose	Gas Connector Hose
Size Range (ID)	DN 6 mm to DN 300 mm	25 mm to 500 mm	1/2 inch to 3/4 inch	DN 8 mm to DN 25 mm
Body Material	Stainless Steel 304 and 316	PU and PVC with Steel Wire	Stainless Steel and Brass	Stainless Steel 304
Working Temperature	-200 degrees C to +600 degrees C	-40 degrees C to +90 degrees C	-10 degrees C to +90 degrees C	-20 degrees C to +105 degrees C
Max Working Pressure	Up to 15.0 MPa (Size dependent)	Vacuum and Low Pressure	Up to 1.0 MPa	Up to 0.05 MPa
End Connection Types	BSP, NPT, Flange, Weld-end	Open Hose and Clamp Fit	F1/2 x F1/2, Conical Nut	Male and Female, Quick Connect

Application

These flexible hose systems serve diverse industrial, commercial, and utility sectors requiring reliable media conveyance:

Industrial Machinery and Hydraulics

Transferring cooling water, cutting fluids, and hydraulic oils within tight machine tool spaces subject to continuous movement.

Plumbing and Sanitary Installations

Supplying water to faucets, water heaters, and flush systems under standard residential and commercial plumbing pressures.

Gas Distribution Networks

Connecting commercial kitchen equipment, boilers, and heating appliances to gas supply piping.

HVAC and Dust Collection Systems

Exhausting fumes, wood chips, and warm air through ventilation ducts in factories, workshops, and commercial buildings.

Manufacturing Capability

Automated Tube Forming and Welding

Stainless steel strip edges are precision-formed and TIG or laser welded in a protective argon atmosphere, achieving seam integrity tested for zero gas leakage.

High-Speed Wire Braiding

Multi-carrier braiding machines apply uniform stainless steel wire mesh over the corrugated core at controlled tension angles to maximize burst pressure resistance.

Hydraulic Crimping and Swaging

End fittings are attached using calibrated multi-jaw hydraulic crimping presses that exert even radial force, preventing fitting blow-off under maximum operating loads.

Quality Control

Pressure and Burst Testing

Production batches undergo hydrostatic pressure testing at 1.5 times the maximum working rating, alongside destructive burst tests to verify structural safety margins.

Leak Detection

Metallic corrugated and gas hoses undergo pneumatic underwater bubble tests or helium mass spectrometer leak detection to identify microscopic pinholes.

Dimensional and Thread Gauging

End connection threads are inspected using calibrated plug and ring gauges to guarantee thread depth and pitch accuracy.

Tensile Pull Verification

Crimped fitting assemblies are sampled on tensile test benches to verify that fitting retention forces exceed international pull-off standards.

Our Certificates

Customization

Custom Lengths and Diameters

Production runs tailored to exact metric or imperial lengths, from short connector hoses to 50-meter bulk rolls.

Special Alloy Selection

Custom manufacturing using corrosion-resistant alloys such as Inconel, Monel, or specialized stainless steel grades for extreme chemical environments.

Custom End Fittings

Tailored machining of end fittings, including non-standard thread pitches, quick-disconnect couplings, or specialized flange drillings.

Packaging and Delivery

Coiled and Bounded Bundles

Smaller diameter hoses are tightly coiled, secured with strapping bands, and wrapped in protective woven polyethylene film.

Straight-Length Crating

Rigid metallic hoses and large-diameter assemblies are packed in reinforced wooden crates with internal bracing to prevent bending deformation during transit.

Clear Component Labeling

Shipping cartons and hose assemblies carry durable waterproof labels detailing part numbers, batch numbers, length, and pressure ratings.

FAQ

Q: What is the difference between annular and helical corrugated metal hoses?

A: Annular hoses feature independent parallel convolutions perpendicular to the hose axis, offering high flexibility and easy self-drainage. Helical hoses feature a continuous spiral convolution, which aids smooth fluid flow and reduces pressure drop in specific dynamic pumping setups.

Q: Can these metallic flexible hoses handle high-temperature steam applications?

A: Yes. Stainless steel 304 and 316 corrugated hoses paired with metal-to-metal or welded fittings can operate safely in high-temperature steam environments up to 600 degrees Celsius, provided the working pressure is adjusted downward according to temperature derating charts.

Q: What is the minimum bending radius of the hose, and does bending affect pressure rating?

A: The minimum bending radius varies by diameter and construction type, typically ranging from 4 to 10 times the hose inner diameter for static routing. Exceeding the minimum bend radius during installation places stress on the convolutions and reduces the maximum allowable working pressure.

Q: Are these hoses certified for potable water or gas supply applications?

A: Specific hose series comply with international standards such as WRAS, NSF, or CE for drinking water and EN or ANSI standards for gas line connectors. Please specify your regional certification requirements during the inquiry stage.

Q: What factors determine the burst pressure rating of a flexible hose?

A: Burst pressure is determined by the wall thickness of the inner tube, the convolution geometry, the tensile strength of the wire braid layer, and the mechanical integrity of the end fitting crimp. Hoses are generally rated with a safety factor of 4 to 1 relative to their recommended maximum working pressure.

Q: How do I prevent torsional stress during hose installation?

A: Torsional stress is the primary cause of premature failure in flexible hoses. Installers must ensure the hose is not twisted along its longitudinal axis during connection. Using swivel nuts or floating flange fittings on at least one end helps prevent twist during tightening.

Q: What information is required to order custom-engineered flexible hose assemblies?

A: To process custom orders accurately, provide the media type, operating temperature, minimum and maximum working pressure, required inner diameter, total assembly length, and exact thread or flange specifications for both end fittings.

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