What is a stainless steel capillary tube, and what are its applications?

A Stainless Steel Capillary Tube is a small, narrow, and cylindrical tube made from a corrosion-resistant alloy. These tubes are characterized by their precise and uniform dimensions, typically with an outer diameter ranging from a few millimetres to sub-millimetre sizes. The inner diameter of capillary tubes is significantly smaller, allowing for the controlled flow of liquids or gases.

Stainless steel capillary tubes find extensive applications across various industries due to their unique properties. In the medical field, they are used for precise fluid delivery in applications such as blood sampling, drug delivery systems, and chromatography. Their small size and excellent corrosion resistance make them ideal for analytical instruments like gas and liquid chromatography.

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316 Stainless Steel Capillary Tubing, Stainless Steel Seamless Capillary Tubing, SS Welded Capillary Tubes, 316 Stainless Steel Capillary Tubing, SS Glass Capillary Tube, Stainless Steel Capillary Tube Supplier In Mumbai, India.

In the automotive and aerospace industries, stainless steel capillary tubes are crucial in fuel injection systems, hydraulic lines, and brake systems. These tubes offer high strength, resistance to extreme temperatures, and durability, making them suitable for harsh operating conditions.

What are the advantages of using stainless steel capillary tubes compared to other materials in various industries?

Stainless steel capillary tubes offer several advantages over other materials, making them a preferred choice in various industries. Stainless steel is known for its exceptional corrosion resistance. This property ensures the longevity and durability of capillary tubes, even in highly corrosive environments, such as chemical processing plants or offshore oil rigs.

Stainless steel capillary tubes exhibit high strength and durability, enabling them to withstand mechanical stress, pressure, and temperature variations. This characteristic is particularly valuable in automotive, aerospace, and oil and gas industries, where the tubes may encounter challenging operating conditions.

Another advantage is the dimensional accuracy of stainless steel capillary tubes. They can be manufactured with precise outer and inner diameters, producing consistent and reliable performance. This precision is crucial in applications such as medical devices, analytical instruments, and fluid control systems, where precise measurements and controlled flow are necessary.

Stainless Steel Capillary Tubes also possess excellent thermal conductivity, which is advantageous in applications requiring efficient heat transfer, such as electronics and automotive industries. Additionally, stainless steel is non-reactive, ensuring the purity and integrity of fluids or gases passing through the tubes remain unaffected.

Specification Of Stainless Steel Capillary Tube

Specification ASME / ASTM A213, ASTM A688 / A688M - 08, ASTM A803 / A803M, ASTM A556 / A556M, ASME SA556, ASME SA688
Stainless Steel Capillary Tube 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
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

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Types Of Capillary Stainless Tubes

Stainless Steel Capillary Tube

Stainless Steel Capillary Tubing

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SS 304L Capillary Tubing

SS 304L Capillary Tubing

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SS 316 Capillary Tubing

SS 316 Capillary Tubing

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SS 201 Capillary Tubing

SS 201 Capillary Tubing

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Widest Range of Decorative Stainless Steel Capillary Tubing in Mumbai, India.

  • Widest Range304 Stainless Steel Capillary Tubes
  • Widest RangeStainless Steel 201 Capillary Tubes
  • Widest RangeSS Capillary Tube
  • Widest RangeStainless Steel Capillary Tubing
  • Widest RangeMirror Polished SS Capillary Tube
  • Widest RangeHigh Quality Stainless Steel Capillary Tube
  • Widest RangeStainless Steel 202 Capillary Tube
  • Widest RangeSS welded Capillary Tube
  • Widest RangeBright Polished, Cleaned, Passivated Capillary Tubes
  • Widest Range316 Stainless Steel Capillary Tubing
  • Widest RangeSteel UNS S30400 SS Capillary Tubes Tube
  • Widest RangeUNS S30400 SS Capillary Tubes

Check Stainless Steel Capillary Tubes Types In Detail

Stainless Steel Capillary Tubes Equivalent Grades

304 1.4301 S30400
304L 1.4306 S30403
316 1.4436 S31600
316L 1.4404 S31603

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Stainless Steel Capillary Tube Price

Product Price
Stainless Steel 321H Capillary Tubing Price List US $ 26 - 55 / Pound
Stainless Steel Seamless Capillary Tube Price US $ 2650 - 18870 / Ton
Bright Polished Stainless Steel Capillary Tube Price US $ 1324 - 3675 / Ton
High Quality Seamless Capillary Tube Price Per Kg $6 - 59 / Kg
SS Welded Capillary Tube Price US $ 1346 - 2555 / Ton
304 Welded Stainless Steel Capillary Tube Price In India $665.00 - $1,960.00/ Ton
Capillary SS Tube Price List $724.00 - $1,962.00/ Ton
Polished Stainless Steel Capillary Tube Price Per Piece $6.00 - $646.00/ Piece
201 SS Capillary Tube Price $6,653.00 - $3,638.00/ Ton

For Quatation & Questions Related To Stainless Steel Capillary Tubes

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Capillary Stainless Tube Manufacturing Process

Welding Process

The grade and application requirements have an impact on tube welding and forming. For the manufacturing of tiny diameter tubes, we employ TIG welding. Steel sheets are coiled and welded inside of a welding machine. The steel sheets are shaped into a coil before entering the machine. The seam between these coils is then welded to create a tube.

Drawing/ Floating Process

Pulling a metal bar, rod, or wire through the entirety of a die to change its finish, shape, size, and/or mechanical qualities is known as floating or drawing. The tube's outer, inner, and wall thicknesses are all reduced via the tube drawing procedure. Stainless steel tubes benefit from maintaining the integrity of their surface.

Continuous Seamless Tube Mills

The production of seamless tubes has been transformed by continuous tube mills. These mills do away with the necessity for forging welding or filler metal, in contrast to conventional procedures. With the use of this technology, seamless pipes and tubes may be produced continuously, increasing productivity while lowering costs and improving efficiency.

Continuous Casting

A notable advancement in the production of seamless tubes is continuous casting. The metal is solidified into a continuous billet through the continuous pouring of molten metal into a water-cooled mould. Better uniformity and enhanced mechanical qualities are guaranteed by this continuous casting technique for the tubes.


Metal is heated above the point of re-crystallization and cooled to room temperature during the annealing process. The molecular bonds in metal tighten when it is shaped, making it rigid. The metal is put through an annealing process to regain its ductility.

Sinking Process

Tube sinking is a drawing technique that reduces the diameter of tubes. In this drawing technique, a tube is run through a die without the need of a mandrel. Good inner surface quality is not ensured when using a mandrel. The die angel determines the integrity of the outer surface. The die being used produces a uniform surface. A tube can be significantly smaller than it was originally. When cost is a factor, tube sinking is ideal.

Inspection and Testing

Before sending our items to our consumers, we conduct inspection procedures to verify their integrity.

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Chemical Composition Of Stainless Steel Capillary Tubes

TP304 S30400 0.08 2 0.045 0.03 1 18.0-20.0 8.0-11.0
TP304L S30403 0.035 2 0.045 0.03 1 18.0-20.0 8.0-13.0
TP316 S3160 0.08 2 0.045 0.03 1 16.0-18.0 11.0-14.0 2.0-3.0
TP316L S31603 0.035 2 0.045 0.03 1 16.0-18.0 10.0-14.0 2.0-3.0

Mechanical Properties Of Stainless Steel Capillary Tube

Material Heat Temperure Tensile Strength Yield Strength Elongation %, Min
Treatment Min. Ksi (MPa), Min. Ksi (MPa), Min.
  º F(º C)    
TP304 Solution 1900 (1040) 75(515) 30(205) 35
TP304L Solution 1900 (1040) 70(485) 25(170) 35
TP316 Solution 1900(1040) 75(515) 30(205) 35
TP316L Solution 1900(1040) 70(485) 25(170) 35

Testing & Inspection of Stainless Steel Capillary Tube

Testing (Destructive, Non Destructive)

Positive Material Identification – PMI Testing Hydrostatic Test
Chemical Analysis – Spectro Analysis Hydrogen-Induced Cracking (HIC) Test
Mechanical Testing Such as Tensile, Elongation, Reduction of Area Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
Micro Test Radiography Test
Macro Test Dye Penetrant Test (DP Test)
Hardness Test Ultra Sonic Test (UT)
Pitting Resistance Test Eddy Current Testing
Intergranular Corrosion (IGC) Test Impact Test
Flaring Test Bend Test
Flattening Test

SS Capillary Tube in MM

25 22 20 18 16 14 12 10
WT mm WT mm WT mm WT
WT mm WT mm WT mm WT
Outside Diameter Outside Diameter 0.508 0.711 0.889 1.245 1.651 2.108 2.769 3.404
mm inch   kgs/m kgs/m kgs/m kgs/m kgs/m kgs/m kgs/m
6.35 1/4 0.081 0.109 0.133 0.174 0.212      
9.53  3/8 0.126 0.157 0.193 0.257 0.356 0.429    
12.7  1/2   0.214 0.263 0.356 0.457 0.612 0.754  
15.88  5/8   0.271 0.334 0.455 0.588 0.796 0.995  
19.05  3/4   0.327 0.405 0.553 0.729 0.895 1.236  
25.4 1      0.44 0.546 0.75 0.981 1.234 1.574 2.05
31.75 1 1/4   0.554 0.688 0.947 1.244 1.574 2.014 2.641
38.1 1 1/2   0.667 0.832 1.144 1.514 1.904 2.454 3.233
44.5 1 3/4       1.342 1.774 2.244 2.894 3.5
50.8 2          1.549 2.034 2.574 3.334 4.03
63.5 2 1/2       1.949 2.554 3.244 4.214 5.13
76.2 3          2.345 3.084 3.914 5.094 6.19
88.9 3 1/2       2.729 3.609 4.584 5.974 7.27
101.6 4            4.134 5.254 6.854 8.35
114.3 4 1/2         4.654 5.924 7.734 9.43

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Supply Cities Of Stainless Steel Capillary Tubes

The cities listed here are where we have supplied our grade 304 stainless steel capillary tubes in bulk or small orders. Cities from metropolitan to rural areas we can provide SS Capillary Tubes to satisfy the needs of our clients.

Al Khobar, Pimpri-Chinchwad, Rajkot, Ankara, Lagos, Ludhiana, Petaling Jaya, Toronto, Gurgaon, Port-of-Spain, Noida, Courbevoie, Tehran, Colombo, Gimhae-si, Al Jubail, Nashik, Navi Mumbai, La Victoria, Indore, Dallas, Thiruvananthapuram, Granada, Mumbai, Jeddah, Muscat, Sydney, Coimbatore, Nagpur, Seoul, London, Dammam, New Delhi, Kanpur, Karachi, Rio de Janeiro, Houston, Howrah, Thane, Pune, Algiers, Ulsan, Milan, Bengaluru, Singapore, Geoje-si, Riyadh, Madrid, Aberdeen, Perth, Cairo, Faridabad, New York, Brisbane, Jaipur, Caracas, Bhopal, Kolkata, Manama, Chennai, Bangkok, Melbourne, Ho Chi Minh City, Jamshedpur, Hong Kong, Kuala Lumpur, Montreal, Moscow, Sharjah, Chandigarh, Doha, Ahmedabad, Vadodara, Lahore, Visakhapatnam, Ranchi, Haryana, Hyderabad, Istanbul, Surat, Vung Tau, Secunderabad, Mumbai, Jakarta, Mexico City, Atyrau, Ernakulam, Kuwait City, Bogota, Calgary, Los Angeles, Hanoi, Busan, Baroda, Santiago, Dubai, Chiyoda, Ahvaz, Edmonton, Abu Dhabi.

Documents Provided at the time of Domestic Sales or Export of SS Capillary Tubes

Certificate of Origin Raw Material Test Reports
Commercial Invoice Heat Treatment Charts
Packing List Quality Assurance Plan (QAP)
Fumigation Certificates NABL approved Laboratory Test Reports
Letter of Guarantee Material Test Certificates
ROHS Certificate Certificate of Compliance/Conformity

Application Industries We Supply Stainless Steel Capillary Tubes

ASTM 304 Stainless Steel Capillary Tube For Energy, 316 SS Capillary Tube For Pharmaceutical Industry, OD 8mm x 6mm od 304 Stainless Steel Capillary Tube For Transport, Stainless Steel Electropolished Capillary Tubes For Real Estate, SS 304L Capillary Tube For Textile Industry, Stainless Steel 316L Capillary Tube For Engineering, Stainless Steel Welded Capillary Tube For Manufacturing, Stainless Steel Seamless Capillary Tubing For Production, Steel Capillary Tubes For Technology, Stainless Steel 1/16 in. Capillary Tubing For Waste, AISI Stainless Steel Capillary Tubes For Mining, SS Capillary Tube For Electronics, Stainless Steel Electropolished Capillary Tubes For Health care, 904L Stainless Steel Capillary Tubes For Pulp and Paper Industry, 347H SS EFW Capillary Tubes For Rail Transport, SS Welded Capillary Tubes For Agriculture, UNS S31000 SS Capillary Tubes For Factory, 202 Stainless Steel Seamless Capillary Tube For Food Industry, Polished Stainless Steel Capillary Tube For Tertiary Sector, TP 410 SS Capillary Tubes For Construction, 347H SS EFW Capillary Tubes For Chemical Industry.

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