Flexible Metal Hoses
JR Stainless Steel Flexible Metal Hose
A corrugated stainless steel flexible hose assembly with external braid for flexible equipment and piping connections. Designed for HVAC, pumps, water, steam and industrial piping applications where flexibility, vibration isolation and controlled routing are required.
Also searched as a stainless steel braided metal hose, corrugated stainless steel hose, flanged flexible metal hose or industrial flexible metal hose.
- Model
- JR
- Size Range
- DN8–DN400
- Design Pressure
- 0.25–6.4 MPa
- Design Temperature
- -20°C to +400°C
- Material
- Stainless Steel 304 / 316L
- Standard Connection
- Flanged
- Construction
- Corrugated Metal Hose + Stainless Steel Braid
- Typical Applications
- HVAC / Pumps / Water / Steam / Industrial Piping
CustomizationLength and end-connection configurations can be reviewed according to confirmed project requirements.
Project Configuration
Mingchao can customize the product configuration based on the technical information, operating conditions and dimensional data you provide. Final configuration can be reviewed and manufactured to the approved project drawing.
JR Stainless Steel Flexible Metal Hose Overview
The Mingchao JR Stainless Steel Flexible Metal Hose is a braided corrugated metal hose assembly designed to provide flexibility between piping and connected equipment.
The corrugated stainless steel hose forms the flexible pressure-containing element, while the external stainless steel braid reinforces the assembly and helps control elongation under internal pressure.
JR assemblies are available from DN8 to DN400, with flanged connections as the standard configuration and other end connections available according to confirmed project requirements.
Typical applications include HVAC systems, pump and equipment connections, water and steam lines, power facilities, industrial piping and other services where the selected material is compatible with the operating medium.
Final selection should consider pressure, temperature, medium, required length, movement, bend radius, end connections and installation geometry.
Technical Specifications & Material Construction
| Specification | Confirmed Product Data |
|---|---|
| Product Type | Stainless Steel Flexible Metal Hose |
| Model | JR |
| Size Range | DN8–DN400 |
| Design Pressure | 0.25–6.4 MPa |
| Design Temperature | -20°C to +400°C |
| Main Material | Stainless Steel 304 / 316L |
| Standard Connection | Flanged |
| Other Connections | Available according to confirmed project requirements |
| Construction | Corrugated Metal Hose with External Stainless Steel Braid |
| Typical Applications | HVAC, Pumps, Water, Steam and Industrial Piping |
| Customization | Length and end-connection configuration according to confirmed project requirements |
Actual allowable pressure depends on hose size, braid configuration, operating temperature, end fittings and assembly design. Pressure and temperature limits should not be treated as independent maximum values that automatically apply simultaneously.
Construction Materials
| Component | Material |
|---|---|
| Flange | Stainless Steel 304 / 316 |
| Connection Neck | Stainless Steel 304 / 316 |
| Braid | Stainless Steel 304 |
| Corrugated Hose | Stainless Steel 304 / 316L |
Material suitability must be confirmed against the actual operating medium and temperature before production.
Corrugated Hose & Stainless Steel Braid Construction
The JR assembly combines a corrugated stainless steel hose with an external stainless steel braid.
The corrugated hose provides flexibility, while the braid reinforces the assembly and helps restrain pressure-induced elongation. The final pressure capability and flexibility of an assembly depend on hose diameter, hose material, braid configuration, temperature, end fittings and overall assembly design.
The braid and corrugated hose should be treated as an engineered assembly rather than as independent components.
JR is a flexible hose product and should not be confused with a metal bellows expansion joint designed specifically for direct axial compensation.
Dimensions & Minimum Bending Radius
Catalog reference dimensions and minimum bending radii are shown below. Values are in millimetres.
| DN | Internal Diameter d (mm) | Corrugated Pipe OD (mm) | OD with 1-Layer Mesh Sleeve (mm) | Static Minimum Bend Radius (mm) | Dynamic Minimum Bend Radius (mm) |
|---|---|---|---|---|---|
| 8 | 8.8 | 13.2 | 14.4 | 50 | 110 |
| 10 | 11.7 | 16.5 | 17.7 | 65 | 145 |
| 15 | 13.5 | 19.5 | 21.1 | 80 | 180 |
| 20 | 20.0 | 27.0 | 28.6 | 120 | 270 |
| 25 | 27.0 | 34.5 | 36.1 | 160 | 360 |
| 32 | 32.0 | 40.0 | 41.6 | 175 | 400 |
| 40 | 39.6 | 52.0 | 53.6 | 225 | 510 |
| 50 | 49.7 | 62.0 | 63.6 | 280 | 640 |
| 65 | 61.2 | 80.2 | 81.8 | 410 | 915 |
| 80 | 79.0 | 96.3 | 97.9 | 486 | 1030 |
| 100 | 101.2 | 119.6 | 121.2 | 610 | 1340 |
| 125 | 124.1 | 145.3 | 146.9 | 700 | 1540 |
| 150 | 149.4 | 180.8 | 182.4 | 810 | 1780 |
| 200 | 176.0 | 240.0 | 243.2 | 1000 | 2000 |
| 250 | 248.0 | 290.0 | 294.0 | 1250 | 2500 |
| 300 | 298.0 | 350.0 | 354.0 | 1500 | 3000 |
| 350 | 347.0 | 400.0 | 404.8 | 1750 | 3500 |
| 400 | 397.6 | 460.0 | 464.8 | 2000 | 4000 |
Static bend radius applies to a fixed installation condition. Dynamic bend radius should be considered where repeated flexing is expected. Size-specific maximum working-pressure values are not shown here pending factory confirmation of the source pressure-rating data. Final allowable pressure must be confirmed for the selected size, braid configuration, temperature, end fittings and assembly design.
Flanged & Custom End Connection Options
Flanged connections are the standard configuration for the JR Stainless Steel Flexible Metal Hose.
Other end configurations can be reviewed according to the customer's piping and equipment requirements, including alternative flange configurations, threaded ends and other project-specific connections where confirmed.
For quotation, please provide the required end-connection specification or a drawing whenever possible.
Do not assume flange drilling or thread compatibility from nominal hose size alone. Connection dimensions should be confirmed before manufacture.
Applications for HVAC, Pumps & Industrial Piping
HVAC & Building Services
Flexible equipment and piping connections in HVAC and building-services systems.
Pumps & Mechanical Equipment
Flexible connections near pumps and mechanical equipment where vibration and installation geometry must be considered.
Water & Water Treatment
Braided metal-hose connections for compatible water and water-treatment services.
Steam Service
Steam piping where the selected assembly is suitable for the actual pressure, temperature and medium.
Power & Utilities
Flexible connections in power and utility piping according to confirmed service conditions.
Industrial Process Piping
Industrial piping where pressure, temperature, movement and material compatibility have been reviewed.
Oil, Gas & Chemical Service
Project-specific service only where material compatibility is confirmed against the actual medium, pressure and temperature.
Marine & Shipbuilding
Flexible piping connections where marine project requirements and materials are confirmed.
Application suitability depends on the medium, operating pressure, temperature, movement, installation geometry, material and end-connection specification.
How to Select a Stainless Steel Flexible Metal Hose
Provide the following information for technical review and quotation:
- Nominal diameter or required hose inside diameter.
- Required overall assembly length.
- Design and working pressure.
- Operating temperature.
- Process medium.
- Vibration, lateral offset or other movement requirement.
- Whether the service is static or dynamically flexing.
- Installation orientation and available space.
- Required end connections.
- Flange, thread or fitting specification or drawing.
- Required hose and braid material, if specified.
- Single- or double-braid requirement, if specified.
- Quantity.
- Application.
- Destination country.
- Existing hose drawing or photograph for replacement requirements, where available.
Providing these details allows the hose length, bend radius, materials, braid configuration and connection design to be reviewed before quotation.
JR Flexible Metal Hose vs. Grooved-End Flexible Metal Hose
| Selection Point | JR Stainless Steel Flexible Metal Hose | Grooved-End Flexible Metal Hose |
|---|---|---|
| Main Product Role | General industrial flexible metal hose assembly | Flexible hose for grooved piping systems |
| Model | JR | No fixed model |
| Standard Connection | Flanged | Grooved-End |
| Size Range | DN8–DN400 | DN32–DN350 |
| Design Pressure | 0.25–6.4 MPa | 0.25–2.5 MPa |
| Material Information | Stainless steel material grades are available in current JR source data | Product-level material grades require confirmation |
| Typical Selection Focus | Material, length, bend radius, braid, pressure, temperature and end connections | Grooved-end compatibility, length, routing, pressure, temperature and equipment connection |
| Typical Systems | HVAC, pumps, water, steam and industrial piping | HVAC, pumps, building services and grooved industrial piping |
The two products serve related but different connection requirements. JR is the broader stainless steel flexible metal hose platform, while the Grooved-End Flexible Metal Hose is selected specifically where a compatible grooved-end piping connection is required.
Neither product should be treated as a direct axial bellows compensator.
Installation, Routing & Bend-Radius Considerations
A straight braided metal hose must be installed as a flexible assembly within its confirmed routing and bend-radius limits.
Prevent Twisting
Do not twist the hose assembly during installation.
No Axial Fit-Up
Do not compress or extend a straight braided metal hose axially to make it fit an installation.
Minimum Bend Radius
Maintain at least the confirmed minimum bend radius.
Protect End Fittings
Avoid sharp bends near hose end fittings.
Allow Sufficient Length
Use sufficient hose length for the required movement and installation geometry.
Control the Bending Plane
Keep repeated flexing within the intended bending plane where applicable.
Independent Support
Support connected piping and equipment independently.
Avoid External Weight
Do not allow unsupported pipe or equipment weight to compress the hose.
Protect the Assembly
Protect the braid and corrugated hose from abrasion, impact, weld spatter and other mechanical damage.
Confirm Service Conditions
Confirm pressure, temperature, medium and material compatibility before installation.
Inspect Before Service
Inspect the corrugated hose, braid, end fittings and attachment weld areas before service.
Axial Thermal Growth
Where significant axial thermal expansion must be absorbed, use an appropriate engineered hose loop or suitable expansion joint after technical review rather than directly compressing or extending a straight braided hose.
Real Product Photos & Technical Documents
The images below show the current Mingchao JR product, construction and end-connection reference information.
Available technical information may include confirmed dimensional data, material data, connection drawings and project-specific selection information.
The current product source references a metal-bellows standard that does not match the JR flexible metal hose product identity. Therefore no product compliance standard is stated on this page until the applicable JR manufacturing standard is confirmed.
For technical review, please send your required DN, length, pressure, temperature, medium, movement condition, end connections, quantity and project drawing.