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Stainless Steel Capillary Tubes


A tube consisting of an inner diameter which is as thin as a hair is the Stainless Steel Capillary Tubes. Stainless Steel Capillary tubes are useful when you want to connect temperature and pressure sensing bulbs for controlling a mechanism. These Stainless Steel Capillary tubes, despite being very thin, are made up of rigid materials like plastic or glass inside which a liquid can flow up into the tubes opposite to the gravity and this process is thought to be capillary action. All liquids have inherent physical properties which keeps them in coherence and adherence to each other.
These cohesion and adhesion properties makes a few water molecules akin to the inner tube. This further leads to following up of the molecules one after other rising up into the tube. Keep the hole as small as possible as this will help the water to rise up faster against the gravity. Do not hold the stainless steel capillary tubes vertically as this eventually resists the water from climbing up. Stainless Steel Capillary Tubes is basically a movement of liquid of in a short cross section passage inside a capillary tube. In capillary tubing, the inter molecular forces are responsible for the capillarity action between the liquid and the tube.

Stainless Steel Capillary Tubes


Typical Sizes

Outer diameter- 2.00, 2.50, 3.00. (0.3 –12.0 mm). Inner diameter- 0.10, 0.80, 0.20

Wall Thickness

0.95, 1.21, 1.40.


SS304, SS304L, SS316, SS316L, SS321, SS321H, 309, 310S


0.08 – 0.2 mm


As per Customer Requirement

Stainless Steel Capillary Tubes
Stainless Steel Capillary Tubes
Stainless Steel Capillary Tubes

Surface Finish

Polished, colored


ASTM, BS, JIS, DIN, GB , AISI, ISO, other International Standards

Delivery Time

Standard Sizes, Available Exstock

Delivery Condition

Pickled, Polished, Bright Annealed, Electrolytic Polished


In seaworthy wooden cases or in bundles.

Payment Terms

L/C or T/T

Capillary action technique is useful in applications such as:

  • Drawing up of liquids between the hairs of a paintbrush
  • Thin tubes
  • Porous materials such as paper
  • Some non-porous materials, such as liquefied carbon fiber
  • Thin layer chromatography.

FittingCart manufactures Stainless Steel Capillary tubes with a maximum bore of 0.0158 in., available in a wide range of stainless steels at FittingCart. They are further categorize by oil free inner surface, tight tolerances, other particles or grease to ensure smooth flow. Our products are Prefinish, Burr-Free ends, Square with unique interiors which look after the minimum dead volume connections. These stainless steel capillary tubes are well clean, polished and passivized so that you can immediately use it. Do not use it for Biological Samples.

Crystalline Structure of Stainless Steel Capillary Tubes

  • Capillary Tube could be a slim and long tube of same continuous diameter. The word “capillary” could be a name since physical phenomenon isn’t vital in refrigeration application of capillary tubes. Typical tube diameters of refrigerant capillary tubes vary from zero.30 millimeter to thirty one.75 mm O.D. And 0.06 mm to 1.65 millimeter thickness and therefore the length ranges from one.0 mm to 6.0 mm. It & is wide employed in instrumentation Industries.
  • Austenitic, or three hundred series, stainless-steels form up over seventieth of total untainted steel production. They contain a most of zero.15% carbon, a minimum of 16 PF metal and adequate nickel and/or Mn to retain a solid solution structure in the least temperatures from the refrigerant region to the temperature of the alloy. A typical composition of eighteen metal and 100% nickel, normally referred to as 18/10 untaint, is usually useful in flatware. 18/0 and 18/8 also are offered.
  • Super solid solution untainted steels, like alloy AL-6XN and 254SMO, exhibit nice resistance to chloride erosion and crevice corrosion because of high atomic number 42 content (>6%) and gas additions, and therefore the higher nickel content ensures higher resistance to stress-corrosion cracking versus the three hundred series. the upper alloy content of super solid solution steels makes them dearer. different steels can give similar performance at lower price and square measure most popular in sure applications.
  • Ferritic untainted steels typically have higher engineering properties than solid solution grades, however have reduced corrosion resistance, because of the lower metal and nickel content. They’re additionally sometimes more cost-effective. They contain between ten.5% and twenty seventh metal and extremely very little nickel, if any, however some varieties will contain lead. Most compositions embrace molybdenum; some, metallic element or metallic element.
  • Martensitic untainted steels don’t seem to be as corrosion-resistant because the different 2 categories however square measure very robust and hard, furthermore as extremely machinable, and may be hardened by heat treatment. Martensitic stainless-steel contains metal (12–14%), atomic number 42 (0.2–1%), nickel (less than 2%), and carbon (about zero.1–1%).
  • Precipitation-hardening martensitic untainted steels have corrosion resistance admire solid solution varieties, however is precipitation hardened to even higher strengths than the opposite martensitic grades. The foremost common, 17-4PH, uses regarding 17 November metal and 4 wheel drive nickel. The Lockheed-Martin Joint Strike Fighter is that the 1st craft to use a precipitation-harden able stainless-steel -Carpenter Custom 465—in its frame.
  • Duplex untainted steels have a mixed microstructure of solid solution and solid solution, the aim sometimes being to supply a 50/50 combine, though in business alloys the quantitative relation is also 40/60. Duplex untainted steels have roughly double the strength compared to solid solution untainted steels and additionally improved resistance to localized corrosion, notably erosion, crevice corrosion and stress corrosion cracking.


Why buy from FittingCart?
  • Stainless steel won’t rust easily and has absolute corrosion resistivity.
  • Advanced welding process, i.e., pullout from the processing.
  • A large stock of tubes ready for call off
  • Tubes produced as per specified dimensions
  • High quality alloys and supplied with unique finishing.
  • Tubes can be cut to size as per recommending
  • Shipment in worldwide
  • ISO 9001:2008 quality certified tubes with prior sample products supplement.
Aim of FittingCart

To be the biggest and topmost manufacturer, Distributor, Stockholder, Exporter and Supplier of Stainless Steel Capillary Tubes in not just India but also worldwide. We tend to produce high quality stainless steel tubes at sell them at competitive market price.

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