Choosing the right silicone tubing for an industrial fluid transfer system involves more than checking the tube diameter or temperature rating. The fluid itself, operating pressure, flow requirements, working environment, and connection method all affect tubing performance. A tube that works well for water circulation may not be suitable for chemical dosing, oil transfer, or continuous-duty pumping.
For equipment manufacturers, system integrators, and industrial buyers, selecting suitable silicone tubing helps reduce leakage risks, avoid premature tube failure, and maintain stable fluid flow. SUNRISE, a silicone hose and tubing manufacturer with experience in custom silicone products, supplies different tubing constructions for industrial, food processing, healthcare, and other applications.
This guide explains how to select silicone tubing for industrial fluid transfer systems, including material compatibility, dimensions, pressure requirements, reinforcement, and application-specific considerations.
Why Silicone Tubing Is Used in Industrial Fluid Transfer
Silicone tubing is widely used in industrial equipment because of its flexibility, temperature stability, weather resistance, and electrical insulation properties. It can be manufactured in different diameters, wall thicknesses, colors, and reinforcement structures to meet specific equipment requirements.
Compared with some conventional plastic tubing, silicone tubing can maintain flexibility across a wider temperature range. It is also resistant to ozone and UV exposure, making it useful in equipment exposed to outdoor or demanding environmental conditions.
Common applications include:
- Fluid circulation and cooling systems in industrial equipment.
- Liquid transfer lines in food and beverage processing machinery.
- Peristaltic pump systems and dosing equipment.
- Laboratory and healthcare equipment requiring flexible tubing.
- Industrial machinery using specialized fluid or vacuum connections.
However, silicone is not a universal solution for every fluid. Certain oils, fuels, organic solvents, and aggressive chemicals may require fluorosilicone, FKM-lined constructions, or another compatible hose material. Material compatibility should always be confirmed before selecting a tube.
Check Fluid Compatibility Before Selecting Silicone Tubing
Fluid compatibility should be the first consideration when selecting tubing for an industrial transfer system. The transported medium directly contacts the inner tube surface, so an unsuitable material may swell, soften, harden, crack, or release unwanted substances into the fluid.
Identify the Type of Fluid
Start by identifying exactly what the tubing will transport. Water, air, beverages, pharmaceutical liquids, oils, and chemical solutions have different compatibility requirements.
For example, general-purpose silicone tubing may be suitable for certain water or liquid transfer applications. However, it should not automatically be selected for petroleum-based oils, fuels, or aggressive solvents. These applications may require a specially formulated material or a chemically resistant inner lining.
For applications involving chemical media, buyers can review industrial silicone tubing and discuss the actual chemical composition and operating conditions with the manufacturer before confirming the material.
Consider Fluid Purity and Contact Requirements
When tubing is used in food processing, beverage production, or pharmaceutical-related equipment, material compliance becomes especially important. Buyers should check whether the tubing meets the relevant food-contact or industry requirements for the intended application.
Platinum-cured silicone tubing is commonly selected for applications requiring controlled material purity. SUNRISE offers platinum-cured silicone tubing that meets the requirements of FDA 21 CFR 177.2600, REACH, and the EU Food Contact Materials Regulation (EC) No. 1935/2004, as stated for the product.
For these applications, explore platinum-cured silicone tubing and verify the specific compliance documentation required by the final application.
Determine the Correct Tube Size and Flow Requirements
Tube dimensions directly influence flow rate, pressure loss, and connection performance. Even when the material is suitable, incorrect dimensions can reduce system efficiency or create installation problems.
Inner Diameter and Outer Diameter
The inner diameter (ID) determines the available flow passage, while the outer diameter (OD) affects fitting compatibility and installation space. Both dimensions should be confirmed before ordering.
For a given flow rate, a smaller inner diameter generally increases fluid velocity and pressure loss. A larger diameter may reduce resistance, but it can also increase equipment size and fluid volume inside the line.
When specifying tubing, provide the following information:
- Required inner diameter and outer diameter.
- Wall thickness and dimensional tolerance.
- Required tubing length and cutting tolerance.
- Fitting, connector, or clamp dimensions.
Wall Thickness and Flow Stability
Wall thickness affects the tube's mechanical strength, flexibility, and resistance to deformation. Thin-wall tubing may be appropriate for low-pressure applications where flexibility is important. Thicker-wall tubing may be needed when additional structural support is required.
For pump-driven systems, also consider whether the tube will experience repeated compression, pulsation, or bending. The tubing should be evaluated under actual operating conditions rather than selected by dimensions alone.
Evaluate Operating Pressure and Reinforcement
Pressure requirements are another important factor in industrial fluid transfer. Standard extruded silicone tubing is often used in low-pressure or gravity-fed systems, while applications involving higher working pressure, suction, or vacuum may require reinforced construction.
When Is Reinforced Silicone Tubing Necessary?
Reinforcement helps improve dimensional stability and resistance to expansion or collapse. Depending on the application, manufacturers may use polyester, aramid, fiberglass, or steel wire reinforcement.
For example, braided silicone tubing can provide additional strength for applications involving pressure fluctuations and demanding operating conditions. The actual pressure rating depends on the tube dimensions, reinforcement material, construction, and test conditions.
SUNRISE provides platinum-cured braided silicone tubing, which combines a silicone tube with braided reinforcement. The product information specifies a temperature range of -55°C to +250°C. This is a product-specific specification and should not be assumed to apply to every silicone tube.
Consider Vacuum and Suction Conditions
Fluid transfer systems do not always operate under positive pressure. Pump suction, vacuum connections, and negative-pressure conditions can cause unsupported tubing to deform or collapse.
In these cases, wire-reinforced silicone hose may be a better option. Its internal wire support helps the hose maintain its shape under suitable vacuum conditions. Buyers should confirm the vacuum rating, bending radius, and operating temperature with the supplier.
Match Temperature Resistance to Actual Working Conditions
Industrial fluid transfer systems may operate continuously at elevated temperatures or experience frequent heating and cooling cycles. Selecting tubing based only on its maximum temperature rating can lead to problems if the actual operating environment is not considered.
Before choosing a product, check:
- Normal operating temperature of the fluid.
- Maximum and minimum temperature during startup and shutdown.
- Whether the tubing is exposed to external heat sources.
- Temperature changes during cleaning or sterilization.
- Whether the tube must maintain flexibility at low temperatures.
Temperature resistance varies with silicone formulation, curing process, reinforcement, and product construction. A tube that performs well at a certain temperature in static conditions may have different service performance under pressure, repeated bending, or continuous fluid contact.
Ask the manufacturer to confirm the recommended continuous operating range and any limitations for your specific application.
Check Flexibility, Bending Radius, and Installation Space
Industrial equipment often has limited installation space. Tubing may need to pass around machine components, connect to moving parts, or fit into compact equipment layouts.
Flexible silicone tubing is useful in these situations, but excessive bending can restrict flow, cause kinking, or place additional stress on the connections. The minimum bending radius should therefore be considered during system design.
For applications requiring more flexibility or a specific tube configuration, buyers should provide installation drawings or physical samples. SUNRISE can manufacture silicone hoses and tubing according to customer drawings or samples, helping match the product to the actual equipment layout.
Select the Right Silicone Tubing for Different Industrial Applications
Different industries have different fluid transfer requirements. The following examples provide a practical starting point for product selection.
Food and Beverage Processing
Food and beverage equipment may require tubing with appropriate food-contact compliance, low odor, and suitable resistance to the transported liquid and cleaning process. Platinum-cured silicone tubing is often considered for beverage, milk, and water transfer systems.
Industrial Pumps and Dosing Equipment
Peristaltic pumps repeatedly compress tubing during operation. Tube elasticity, fatigue resistance, dimensional consistency, and compatibility with the pumped fluid are important selection factors. Buyers should confirm pump specifications and expected operating cycles before choosing tubing.
Chemical and Industrial Processing
Chemical transfer requires careful evaluation of fluid compatibility, concentration, temperature, and exposure time. General-purpose silicone should not be assumed suitable for all acids, alkalis, or organic solvents. A specialized lining or alternative elastomer may be necessary.
Healthcare and Laboratory Equipment
Healthcare and laboratory equipment may require tubing with specific cleanliness, material traceability, and regulatory documentation. Buyers should define whether the application requires general industrial-grade silicone, food-contact-grade tubing, or a product validated for a particular medical or pharmaceutical use.
What Information Should You Provide to a Silicone Tubing Manufacturer?
Providing complete application details helps a manufacturer recommend a suitable tubing structure and avoid unnecessary sample revisions. Before requesting a quotation, prepare the following information:
- Fluid type: The exact liquid, chemical name, concentration, and any additives.
- Dimensions: Required inner diameter, outer diameter, wall thickness, and length.
- Operating conditions: Working pressure, vacuum level, flow rate, and temperature range.
- Construction: Standard extruded, braided, wire-reinforced, or other specialized tubing.
- Compliance: Applicable FDA, REACH, RoHS, or other industry requirements, where relevant.
- Installation details: Fitting type, bending radius, connection method, and available space.
- Order requirements: Estimated quantity, sample requirements, and expected delivery schedule.
As an experienced silicone hose manufacturer, SUNRISE has supplied silicone hoses, extruded tubing, and molded silicone products for different industrial applications since 2006. The company supports custom production according to customer drawings or samples. For extruded tubing, the published minimum order quantity is 100 meters per item.
Providing these details allows the engineering and sales teams to evaluate the application more accurately before recommending a product.
How to Choose the Right Silicone Tubing: A Practical Checklist
Before finalizing a silicone tubing specification, review these essential points:
- Is the silicone material compatible with the actual fluid?
- Does the tubing meet the required inner and outer diameter tolerances?
- Can it withstand the working pressure or vacuum conditions?
- Is reinforcement required to prevent expansion or collapse?
- Does the operating temperature stay within the product's rated range?
- Can the tubing meet the required bending radius and installation dimensions?
- Are the necessary material certificates and compliance documents available?
- Has the selected tubing been tested under representative working conditions?
A suitable silicone tube is not simply the one with the highest temperature rating or the thickest wall. It is the product whose material, dimensions, construction, and performance match the complete operating conditions of the fluid transfer system.
Frequently Asked Questions About Industrial Silicone Tubing
Can silicone tubing be used for industrial chemical transfer?
Yes, but only when the silicone compound is compatible with the specific chemical, concentration, temperature, and exposure conditions. Standard silicone tubing is not suitable for every solvent, oil, or aggressive chemical. Specialized linings or alternative materials may be required.
What is the difference between standard and braided silicone tubing?
Standard silicone tubing is generally used for applications where flexibility and basic fluid transfer requirements are the priority. Braided silicone tubing includes a reinforcement layer that improves mechanical strength and helps resist expansion under pressure. The actual working pressure must be confirmed for each product specification.
How do I determine the correct silicone tubing size?
Start with the required inner diameter based on flow rate and system pressure loss. Then confirm the outer diameter, wall thickness, fitting dimensions, and installation space. Providing a drawing or sample to the manufacturer can help ensure dimensional accuracy.
What temperature range can silicone tubing withstand?
The temperature range depends on the silicone formulation and tubing construction. For example, SUNRISE specifies a range of -55°C to +250°C for its platinum-cured braided silicone tubing. Buyers should confirm the continuous operating temperature and application-specific limitations before ordering.
Can SUNRISE manufacture custom silicone tubing for industrial equipment?
Yes. SUNRISE manufactures silicone tubing and hoses according to customer drawings or samples. Buyers can provide the required dimensions, material requirements, reinforcement structure, operating conditions, and order quantity for a product evaluation and quotation.
Find the Right Silicone Tubing for Your Fluid Transfer System
Selecting silicone tubing requires a clear understanding of the fluid, operating environment, mechanical requirements, and applicable standards. By evaluating these factors together, industrial buyers can reduce compatibility problems and choose tubing that performs reliably in the intended equipment.
SUNRISE provides industrial silicone tubing, braided silicone hoses, wire-reinforced hoses, and custom silicone products for different applications. If you are sourcing silicone tubing for industrial fluid transfer, share your specifications or application requirements with the SUNRISE team to discuss a suitable solution.
Contact SUNRISE: sales@siliconehose-china.com