While both sanitary tubing and industrial tubing play a fundamental role in gas and fluid transport, their distinct engineering standards sets these systems apart.
For a successful operation and to optimize your processing goals, you must clearly define your process needs – whether you are meeting 3-A hygiene standards, mitigating bacterial contamination or designing a general fluid conveyance system.
This article examines the critical differences, applications and selection criteria for each tubing class.
What Is Sanitary Tubing?
Sanitary tubing is an engineered, specialized piping solution produced specifically for hygienic applications where contamination control cannot be compromised.
It is mostly a polished stainless steel with a high-purity tube, particularly for industries where strict hygiene is required, such as food, beverage, dairy, and pharmaceutical industries.
Each part is manufactured to eliminate points of microbial harborage, prevent tampering with the product, and support thorough cleaning procedures that maintain product integrity from the start of production to the end.
· Common Materials
The primary materials for sanitary tubing in the manufacturing industries are 304 and 316L stainless steel, known for their gold standards of hygienic process piping.
The 316L grade offers the best corrosion resistance, since it has low carbon and the addition of molybdenum. This makes it withstand aggressive cleaning chemicals and a high-chloride environment.
Furthermore, the high-smooth interior surfaces are generally electropolished or mechanically polished to a certain Ra finish, in order to avoid the adhesion of bacteria and ensure total drainage of the product during the intervals between productions.
Although stainless steel dominates due to its cleanability, durability, and broad chemical compatibility, some applications employ pharmaceutical-grade polymers.
The surface finish is a fundamental functional requirement that directly contributes to product safety and compliance with sanitary tubing standards, and is not simply cosmetic.
· Regulatory Standards
According to regulatory compliance, sanitary tubing is more than just any other single factor.
- FDA-complaint
The Food and Drug Administration requires sanitary tubing to meet strict material and design criteria for direct food and drug contact applications.
- 3-A
The sanitary standards organization develops construction demands with respect to surface finish, weld quality, and traceability of materials to ensure the safety of the people.
- ASME BPE Tubing Standards
The American Society of Mechanical Engineers controls the bio-processing equipment standard for pharmaceutical and biopharmaceutical manufacturing facilities.
These standards define the smallest details in the inspection criteria for welds and dimensional tolerances, ensuring that every tubing piece works safely and uniformly.
Regulated product processing facilities must document when equipment complies with these standards and during regular audits to ensure they satisfy regulatory inspectors and hence protect their operating licenses.
What Is Industrial Tubing?
Industrial tubing is a general term used to describe a range of piping elements that engineers develop to meet the demands of mechanical and chemical production parameters.
In contrast to sanitary systems, industrial tubing does not ensure hygienic operation, and manufacturers do not design it to avoid microbial harborage locations, or even to permit clean-in-place practices.
Material Options
- PVC Tubing
This material is efficient at transferring low-pressure liquids and is highly resistant to the most common acids and bases they cross in production facilities.
- Copper Tubing
Copper tubing is superior in HVAC, refrigeration, and pneumatic low-pressure systems where thermal conductivity is a concern.
- Carbon Steel Pipe
Carbon steel pipe offers the structural integrity and pressure capacity highly necessary for steam, oil, and hydraulic application piping systems in industry.
- Brass Tubing
It is suitable for instrumentation lines and fittings that require moderate pressure and a higher level of machinability.
- Standard-grade Stainless Steel
These materials demand corrosion resistance for chemical process tubing applications but do not require a strict sanitary grade’s surface finish.
It is this material diversity that renders industrial tubing so versatile in an innumerable number of manufacturing industries.
Performance Specifications
Industrial performance focuses on pressure rating, temperature resistance, and mechanical life performance in active operation.
- High-pressure
The construction of the hydraulic system tubing is seamless, and the walls are heavy and thick for daily operations at thousands of PSI.
- Temperature Resistance
Temperature resistance is a necessary requirement in steam lines, heat exchangers, and piping surrounding furnaces, which must maintain structural integrity over a wide thermal cycle without deforming or weakening under stress.
- Vibration
Industrial tubing must resist vibration fatigue, mechanical stress from movement of the pipe, and degradation caused by aggressive fluids present in chemically rich environments.
Key Differences Between Sanitary Tubing and Industrial Tubing
The table below highlights the most critical distinctions that affect your tubing selection decision.
| Features | Sanitary Tubing | Industrial Tubing |
| Regulatory Compliance | You are required to apply the FDA, 3-A, and ASME BPE standards. | Do not require any hygiene-based regulatory mandate. |
| Design & Finish | The finish of the interior surface must be smooth and polished (Ra ≤ 0.8µm). | They accept both rough and unfinished surfaces for most uses where priority isn’t internal cleanliness. |
| Cleanability | Demands automated CIP/SIP processes for cleaning and sterilizing without disassembling. | It requires manual cleaning to remove scale and rust, like using a water jet at 50-200MPa. |
| Cost of Maintenance | Selecting the best sanitary tubing material increases the upfront cost but lowers contamination risk in the long run. | Although the initial cost is lower, it is expensive in the long run because you need to repair, clean, and inspect regularly to avoid breakdown. |
Key Applications
· Sanitary Tubing
Apply sanitary tubing in pharmaceutical manufacturing, food processing, and biotech industries demanding aseptic, high-purity, and corrosion-resistant transport of liquids and gases.
The 304L/316L polished stainless steel prevents bacteria from building up and ensures they comply with 3-A and FDA standards.
- Food and Beverage Processing
Food processing plants use sanitary tubing to transport, process, and package products such as milk, dairy products, fruit juices, beer, and wine.
- Pharmaceutical Production
Manufacturers use sanitary tubing to transport chemical ingredients, high-purity water, and finished liquids in manufacturing environments, ensuring sterile and non-corrosive conditions.
- Biotech and Life Sciences
Scientists choose sanitary tubing in areas where sterile conditions are a concern for handling cell cultures, vaccines, and laboratory fluids.
- Cosmetics and Personal Care
Chemical processors utilize sanitary tubing products to transfer high-viscosity or shear-sensitive products such as lotions, serums, and soaps, hence preventing contamination.
- Chemical Processing
Utilize sanitary tubing for transferring chemicals that require high corrosion resistance and high-temperature tolerance.
· Industrial Tubing
When dealing with demanding environments, utilize industrial tubing for transporting fluids, structural components, gases, and fine solids.
The following are the key industrial tubing applications;
- Oil & Gas and Petrochemical
Engineers use industrial tubing largely in refining, drilling, and transporting crude oil, natural gas, and hazardous chemical materials in upstream and downstream operations.
In such environments, apply high-pressure stainless steel tubing for hydraulic lines and instrumentation.
- Chemical Processing
Chemical processors transport chemicals that are aggressive and have volatile substances, using industrial tubing.
Take PTFE (Teflon) and other special plastic tubes for high chemical resistance.
- Food & Beverage Production
Food production industries take pleasure in hygienic, sanitary piping systems made of stainless steel to transport liquids, including milk, juice, or water, without contamination. The materials are always easy to clean and, at the same time, comply with FDA regulations.
- Pharmaceutical and Medical
For pharmaceutical companies to produce medicines, vaccines, and assemble devices like ventilators and dialysis machines, it is necessary to have sterile and ultra-sanitary tubing.
For this case, always use silicone tubing for biocompatibility.
- Aerospace & Automotive
Aluminum and stainless steel are the most preferred materials in aerospace manufacturing for hydraulic lines, fuel systems, brake lines, and HVAC cooling in aircraft and cars due to their high strength-to-weight ratio.
- Power Generation
Power generation companies are among the crucial manufacturers in the world. They require the mechanical strength and high electrical conductivity of steel and copper tubing to carry steam and gases under high temperatures and pressure in nuclear, thermal, and renewable energy plants.
- Manufacturing and Automation
Automation and manufacturing companies use tubing for pneumatic systems, connecting actuators and cylinders, and conveying raw materials.
How to Choose the Right Tubing for Your Industrial Process
Before committing to installation, invest in a systematic tubing selection checklist to prevent costly mismatches between types of tubing and application requirements.
· Hygiene Standard Requirements
First, you have to determine whether your process requires a hygienic design.
This is because food, beverage, pharmaceutical, and biotech processes highly demand sanitary-grade tubing with regulatory traceability and certified surface finishes.
· Pressure & Temperature Rating
You must identify the maximum temperature and operating pressure of your system. Check the wall thickness of the tubing, its material grade, and design standard against those peak conditions with an appropriate safety factor.
· Compliance and Certification
You require documented compliance with process piping design in regulated environments.
Before purchasing the materials, confirm that your tubing supplier provides material traceability, certificates of conformance, and standard-specific certifications.
· Fluid Type
You must consider the chemical compatibility between the process fluid and your tubing material.
Ensure you select compatible materials to prevent aggressive solvents, oxidizers, and high-chloride solutions from rapidly degrading the tubing.
· Material
Your selection of tubing material will affect both performance and total cost of ownership.
Unlike 316L stainless steel materials, which are excellent for corrosive and high-purity production, or carbon steel for high-pressure and non-corrosive services, PVC materials are best for chemical lines with low cost and pressure.
· Cleaning Considerations
Prior to purchasing, you first determine how your team will clean the system.
When dealing with sanitary processes, you require clean-in-place capability, meaning your internal surfaces must be able to drain fully and be smooth enough to prevent biofilm formation throughout operation.
· Long-Term Maintenance
Selecting sanitary tubing of higher quality reduces the risks of contamination, regulatory liability, and unplanned stoppages, which can increase operating expenses in the long run.
· Consult an Expert
If you are unsure which tubing to choose for complex or regulated applications, contact a supplier specialist or involve a qualified process engineer.
FAQs
1. Can you use industrial tubing for food and beverage applications?
No. The food and beverage industries require smooth surface finishes, material certifications and must also comply with regulations to protect product safety, which industrial tubing lacks.
2. Why is roughness average (Ra) critical in sanitary tubing?
Smoother internal surfaces mean easier cleanability and hence fewer cases of bacteria.
The lower the Ra values, the smoother the surface that resists biofilm formation and support effective CIP cleaning cycles.
3. Does sanitary tubing have a weld bead?
Sure, welded sanitary tubing does contain a longitudinal weld bead, but it is neither visible nor felt.
During manufacture, the weld bead is cold-worked, bead-rolled, or polished to form an interior that is smooth and seamless, with a surface finish of 20 Ra microinch or smaller to remove crevices in which bacteria can hide.
4. How do sanitary and industrial tubing connections compare?
Unlike industrial systems that use threaded, flanged, or compression fittings optimized for retaining pressure, sanitary systems employ tri-clamp connections for fast, hand-tightening disassembly and hygienic leak-proof sealing.
5. Can you use sanitary tubing for high-pressure industrial applications?
Yes, you can apply sanitary tubing to high-pressure industrial applications, but its applicability is strongly dependent on the nature of the fittings employed, the thickness of the tube walls, and the pressure demands of the application.
Partner with OMSS
Whether you are looking for general purpose or specially designed sanitary tubing that meet the highest hygiene standards, OMSS is your trusted partner in China.
We also design and manufacture different piping fittings and connectors to match the specific applications requirements of our clients.
Partner with OMSS today for all your tubing solutions from China – Get a quote.
