Flexible Hoses | Eng-Tips

Most of the time flexible hoses are modeled similar to an untied expansion joint. It should be mentioned effective ID should be neglected because the braid of the flexible hose withstands the pressure thrust of the internal bellows/rubber. Displacements should be checked carefully especially axial and torsional displacements because most flexible hoses especially metallic flexible hoses are susceptible to axial and torsional displacements. Check the displacement results with your vendor.
If you have any offsets in your system I think it cannot be modeled correctly in the software. I would say it depends on stiffness that the hose has. In case the hose diameters are small (what is small? You need to decide by considering flexibility of the hose) I would eliminate the hoses completely from the model since they have very little effect on the nozzle calculation.

In case the nozzle diameters are large which introduce stiffness in the system, and they introduce large vertical loads in addition to other loads on the thin shell so I suggest you to contact to the supplier and get all the required stiffness values and material properties, and model it. If you install it with a curvature you need to follow the curvature in the model by considering its material properties.

In industrial settings, selecting the right hose for your application is about more than just connecting point A to point B. The choice between metal and rubber hoses can impact safety, efficiency, operational costs, and equipment longevity. At 4-STAR Hose & Supply, we regularly help customers throughout Texas make this critical decision for applications ranging from oil field operations to food processing.

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Let’s examine when to choose metal hoses versus rubber hoses for your industrial applications.

Understanding Metal Hoses

Metal hoses are engineered with stainless steel or other metal alloys and come in two main varieties: corrugated (or convoluted) and strip-wound.

Corrugated metal hoses feature a flexible, bellows-like design with a series of convolutions that allow the hose to bend while maintaining structural integrity. These hoses often include an outer braid for added pressure resistance and protection.

Strip-wound metal hoses are constructed from tightly wound metal strips that create a flexible yet durable profile, ideal for non-pressure applications where flexibility is needed.

According to our product documentation, 4-STAR Hose & Supply offers metal hoses in various configurations:

• Stainless steel options in 304, 316, and 321 grades
• Sizes ranging from 1/2″ to 6″
• Both braided and stripwound construction
• Custom welded end connections

Understanding Rubber Hoses

Rubber hoses are typically made from elastomeric materials like EPDM, Nitrile, SBR, or specialized compounds for specific applications. They generally consist of three layers:

• An inner tube compatible with the material being transferred
• Reinforcement layers of textile or wire
• An outer cover protecting against the environment

Rubber hoses offer excellent flexibility, vibration absorption, and can be designed for a wide range of applications from chemical transfer to food processing.

Key Factors in Your Decision

Temperature Requirements

Choose Metal When:

• Extreme temperatures are present (above 350°F or below -40°F)
• Temperature cycling occurs frequently
• Steam applications require consistent performance

Our metal hose can handle temperatures up to °F, particularly when paired with proper insulation. As noted in our literature, GSM armored hoses with stainless steel and fiberglass insulation are specifically designed for high-temperature steel mill applications.

Choose Rubber When:

• Moderate temperatures are present (typically -40°F to 250°F)
• Cost is a significant factor
• Flexibility needs are high

Our Rubberworx™ Hot Air Blower Hose, for example, is rated for temperatures up to 350°F while maintaining flexibility.

Chemical Compatibility

Choose Metal When:

• Highly corrosive chemicals are present
• Media purity must be maintained
• Permeation or contamination is a concern

Stainless steel’s excellent chemical resistance makes it ideal for handling aggressive chemicals without contamination concerns. The 316 stainless steel option is particularly suitable for corrosive environments.

Choose Rubber When:

• Specialized rubber compounds match your media
• Less aggressive chemicals are being handled
• Cost-effectiveness is needed

For chemical applications, we offer specialized rubber hoses like our Rubberworx™ UHMW Chemical Hose with a tube that covers 98% of chemical applications, or our XLPE Chemical Hose that handles 90% of chemical applications.

Pressure Requirements

Choose Metal When:

• High-pressure applications require reliable containment
• Vacuum resistance is needed
• Pressure pulsations are frequent

Metal hoses with proper braiding can handle significant pressure, making them excellent for high-pressure steam, hydraulic systems, or vacuum applications.

Choose Rubber When:

• Lower to moderate pressures are present
• Flexibility is more important than extreme pressure handling
• Cost is a consideration

Many of our industrial rubber hoses are rated for 150-250 PSI working pressure, suitable for most standard applications.

Flexibility and Installation Needs

Choose Metal When:

• Minimal movement after installation is expected
• Space is constrained but sharp bends aren’t required
• Expansion/contraction compensation is needed

Metal hoses excel at absorbing vibration, thermal expansion, and misalignment while remaining in a relatively fixed position.

Contact us to discuss your requirements of Flanged Flexible Metal Hoses. Our experienced sales team can help you identify the options that best suit your needs.

Choose Rubber When:

• Regular movement or handling is required
• Tight bends or routing around obstacles is necessary
• Operators need to manually move the hose frequently

Rubber hoses typically offer greater flexibility and a tighter bend radius than metal alternatives, making them ideal for applications requiring frequent movement.

Environmental Conditions

Choose Metal When:

• External heat or fire risk exists
• Abrasion from external sources is severe
• UV/ozone exposure is significant

Metal hoses provide superior resistance to external factors like heat, fire, and certain environmental elements.

Choose Rubber When:

• Cushioning against impact is needed
• Noise reduction is beneficial
• Weather resistance with lower cost is preferred

Rubber compounds can be formulated to resist weathering, UV exposure, and provide excellent external protection at a lower cost point than metal alternatives.

Industry-Specific Considerations

Oil & Gas Applications

In West Texas oil fields around Midland and Odessa, both metal and rubber hoses serve crucial functions:

Metal Hoses Are Preferred For:

• High-pressure fracking operations
• Hot oil circulation systems
• Applications with significant thermal cycling

Rubber Hoses Are Preferred For:

• Flexible connections on moving equipment
• Chemical transfer with specialized rubber compounds
• General utility applications where cost is a factor

Chemical Processing

Throughout the chemical corridors of Texas:

Metal Hoses Excel In:

• Transferring high-purity chemicals
• Handling corrosive media
• Applications requiring cleanability and minimal contamination

Rubber Hoses Perform Well In:

• Bulk chemical transfer with compatible compounds
• Applications requiring flexibility
• Situations where electrically non-conductive materials are needed

Food & Beverage Industry

In food processing facilities around San Antonio and Dallas:

Metal Hoses Are Essential For:

• Clean-in-place (CIP) systems
• Steam distribution
• Applications requiring absolute cleanliness and sanitization

Rubber Hoses Are Valuable For:

• Food-grade transfer with FDA-compliant materials
• Washdown applications
• General utility where flexibility and ease of handling matter

Industrial Manufacturing

In manufacturing facilities throughout North Texas:

Metal Hoses Are Ideal For:

• Steam distribution systems
• High-temperature processes
• Applications requiring minimal maintenance

Rubber Hoses Work Best For:

• Air and fluid power systems
• Material handling
• General utility applications

Cost Considerations

While metal hoses typically require a higher initial investment than rubber alternatives, the total cost of ownership calculation should include:

1. Expected Service Life: Metal hoses often last longer in severe service conditions
2. Maintenance Requirements: Rubber may need more frequent replacement in some applications
3. Downtime Costs: The cost of unexpected failures can far exceed the difference in initial hose price
4. Safety Factors: The right hose for the application reduces risk of failures and associated costs

The 4-STAR Advantage

At 4-STAR Hose & Supply, we don’t just sell hoses – we provide solutions. With locations serving Dallas, Fort Worth, Cleburne, Midland, and Pleasanton, we’re positioned to support customers throughout Texas with:

• Technical expertise to help you select the right hose for your application
• Custom fabrication capabilities for both metal and rubber hoses
• ASME certified weld shop for metal hose assemblies
• Extensive inventory ready for immediate delivery
• OnGuard™ Hose Safety services for testing and management

Making the Right Choice

The decision between metal and rubber hoses should be based on a thorough evaluation of your specific application requirements. When you partner with 4-STAR Hose & Supply, you gain access to industry experts who can guide you through this decision process, ensuring you get the right product for your needs.

The company is the world’s best Expansion Joints Supplier supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

FAQs About Metal vs. Rubber Hoses