Direct technical answer
How to specify stainless steel capillary tubing
Stainless steel capillary tubing should be specified by material grade, outside diameter, inside diameter, wall thickness, cut length, tolerance, surface finish, end condition, and application. The most common grades are 304 and 316L, with 316L used when stronger corrosion resistance or cleaner analytical environments are required.
Key points for buyers and engineers
- Use 304 for general stainless capillary tube projects where corrosion risk is moderate.
- Use 316L for analytical, laboratory, fluid-path, sensor, or higher corrosion applications.
- Compare OD, ID, and wall thickness together before deciding whether a size is practical.
- Add cut length, end-face quality, packing, and inspection notes when the tube is used as a component.
Technical facts to compare
Useful next pages
FAQ
What is the difference between OD, ID, and wall thickness?
OD is the outside diameter, ID is the inside bore diameter, and wall thickness is the tube wall between them. All three affect fit, flow, strength, and manufacturability.
Should buyers choose 304 or 316L capillary tubing?
Choose 304 for general use and 316L when corrosion resistance, cleaning, or analytical environment requirements are stronger.
RFQ information to prepare
For supplier review, prepare material grade, OD, ID, wall thickness, cut length, tolerance, quantity, surface finish, application, drawing files, inspection requirements, packing notes, and destination country.
Supplier quote support is available through Dongguan Yefa Metal Materials Co., Ltd, while this page remains focused on capillary tubing technical data and sourcing decisions.