Stainless Steel Capillary Tubes
Stainless Steel Round Pipe
Stainless steel capillary tubes are widely used in various fields due to their excellent corrosion resistance, high temperature resistance and mechanical strength. This slender pipe is made of high-quality stainless steel materials, such as 304 and 316, which allows it to adapt to various complex environmental conditions, including corrosive liquids such as acids and alkalis.
The diameter of stainless steel capillary round tubes is usually small, generally in the millimeter range, and its wall thickness is also very thin. This design allows the pipeline to have sufficient channel size while ensuring smooth flow and miniaturization of resistance. In addition, due to its small diameter, the wall of the stainless steel capillary tube is also very thin, usually between 0.01 mm and 0.1 mm, thus ensuring its mechanical strength.
Austenitic stainless steel capillary tubes are used in a wide range of applications. Due to its excellent flow characteristics and high precision, this capillary plays an indispensable role in analytical techniques such as liquid chromatography and capillary electrophoresis. In addition, it is also used to transport small flows of liquid or gas, especially in fluid control and delivery in microfluidic systems.
Stainless Steel Capillary Tube Specification
| Size Range | 0.35mm to 6.35mm OD in thickness ranging from 0.1mm to 1.2mm. |
| Thickness | 1mm to 20mm, SCH 5/5S, 10/10S, 20/20S, 40/40S, 80/80S, 120/120S, 160/160S as per ANSI B36.19/36.10 |
| Wall Thickness | 0.08 – 0.2 mm |
| Outside Diameter | 0.3 –12.0 mm |
| Specification | ASME / ASTM A213, ASTM A688 / A688M - 08, ASTM A803 / A803M, ASTM A556 / A556M, ASME SA556, ASME SA688 |
| Material | SS 304, SS 304L,SS 316,SS 316L |
| Finish | Pickled, Polished, Bright Annealed, Electrolytic Polished |
| Form | Round, Strait, Hydraulic etc. |
| Type | As Welded, EFW, ERW, Seamless, Semi Seamless, Bead Removed |
| Mill Test Certificate | EN10204 3.1 |
| Packing | Sleeved, Ends Capped, Wooden Boxed |
Stainless Steel Capillary Round Tube Standard
| Mechanical properties | Material Item | 201 | 202 | 304 | 316 | S31803 | S32750 | |
| Tensile Strength (MPa) | ≥655 | ≥620 | ≥515 | ≥515 | ≥620 | ≥800 | ||
| Yield Strength (MPa) | ≥260 | ≥310 | ≥205 | ≥205 | ≥450 | ≥550 | ||
| Elongation (%) | ≥35 | ≥35 | ≥35 | ≥35 | ≥25 | ≥15 | ||
| Hardness (HV) | ≤230 | ≤230 | ≤200 | ≤200 | ≤303 | ≤323 | ||
Stainless Steel Electropolished Pipe
Heat treatment (annealing) of stainless steel capillary tubes
For 304/304L stainless steel, it cannot be hardened by heat treatment itself. But its tensile strength and hardness can be enhanced through cold working, such as stretching, bending or twisting. When it comes to annealing, the temperature is typically set between 1850°F and 2050°F. The main purpose of annealing is to soften the material and improve its plasticity. But importantly, because this material is prone to oxidation at high temperatures, it needs to be cooled quickly. For heavier parts, water cooling is recommended, while for lighter parts, air cooling is recommended.
Gnee has an ISO9001-2000 quality management system and an ISO14001 environmental protection system. At the same time, it actively develops diversification and has formed mainly carbon steel and stainless steel, covering pipes, profiles, plates and other products. Exported to more than 60 countries and regions including Russia, Canada, India, Brazil, and Southeast Asia.
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