How to Select the Right ASTM A270 Sanitary Tubing for Your Next Project?

tubes blog Sep 5, 2023
How to Select the Right ASTM A270 Sanitary Tubing for Your Next Project

When planning a project that requires the use of ASTM A270 Sanitary Tubing, one of the most crucial steps is selecting the right type of Tubing. With so many options available, choosing the perfect Tubing for your project can be overwhelming. However, by considering several factors, you can ensure you select the right ASTM A270 Sanitary tubing for your specific needs.

What are ASTM A270 Sanitary Tubings?

ASTM A270 Sanitary Tubings are a set of specifications outlined by the American Society for Testing and Materials (ASTM) for stainless steel welded and seamless tubes used in the food, beverage, and pharmaceutical industries. These specifications cover the requirements for surface finish, mechanical properties, chemical composition, and dimensions. The sanitary tubing is manufactured in various grades of austenitic stainless steel, such as 304, 304L, 316, and 316L. These grades are chosen based on their high resistance to corrosion, excellent mechanical properties, and ability to withstand extreme temperatures and pressure. Also, the seamless tubes are manufactured via extrusion, while the welded tubes are produced by electric resistance welding (ERW) or Tungsten Inertia Gas (TIG) welding.

Select the Right ASTM A270 Sanitary Tubing for Your Next Project

Consider the Material:

When choosing ASTM A270 Sanitary tubing, the first and foremost factor to consider is the material. Sanitary Tubing is typically manufactured using stainless steel, which is a great option due to its durability, resistance to corrosion, and easy-to-clean properties. There are, however, different types of stainless steel, each with unique properties. For instance, you can choose between austenitic stainless steel, which is known for its high formability and weldability or ferritic stainless steel, which is excellent for use in high-temperature environments.

Gauge and Tube Dimensions:

Another critical factor to consider when selecting ASTM A270 Sanitary tubing is the tube’s gauge and dimensions. Gauge refers to the tube’s wall thickness; the thicker the gauge, the more robust the Tubing will be. The tube’s diameter and length should also be considered, as this will dictate the Tubing’s flow rate. Understanding your project’s proper sizing guidelines will ensure that the Tubing fits perfectly and functions appropriately.

Surface Finishing:

Sanitary Tubing must meet specific surface finishing requirements to ensure it’s certified for use in the food, pharmaceutical, and biotech industries. The surface finishing directly impacts the Tubing’s ability to resist corrosion. The most widely accepted surface finish requirements of Astm A270 are The Mill Finish,  when the tube possesses fine finishes as produced by the mill, 180 grit, 240 grit, 320 grit and 400 grit. 240 grit is the standard finish for most applications.

Application and Design Considerations

Your specific project’s application will determine the type of Tubing best suited to your specific needs. For instance, if your project is related to the food and beverage industry, you must choose ASTM A270 Sanitary tubing that meets specific NSF (National Sanitation Foundation) standards. Similarly, if your project involves high-temperature or corrosive environments, you must choose Tubing that is suitable for this purpose. Collaborating closely with a supplier with experience installing sanitary process systems is essential to identify your unique situation’s appropriate solution.

Compliance and Certifications

To ensure that you purchase the appropriate ASTM A270 Sanitary tubing for your project, you must ensure that the Tubing meets the necessary compliance and certification standards. The ASTM A270 standard section 6.1 ensures that materials used to make Tubing should meet required Mechanical Properties, Composition (where applicable), and Permissible variations in wall thickness. The Sanitary Tubing must also carry a certificate of conformance or an inspection release document that assures that the Tubing meets the standard, dimensional, qualitative, and surface requirements.


Picking the right ASTM A270 Sanitary tubing for your project will involve considering various factors such as material, surface finishing, dimensions, application, design considerations, and compliance/certifications. Working with experienced professionals can help you design the most effective system for your project to ensure you get the best possible results. When you choose the right Tubing for your project, you can complete your work more effectively from start to finish.

How to Select the Right ASTM A270 Sanitary Tubing for Your Next Project?

by PIYUSH STEEL time to read: 3 min