Stainless Steel Capillary Tubes

Stainless Steel Capillary Tubes are highly engineered tubes that are very precise in their production process and have diameters that make them ideal where there is need for accurate fluids or gases flow, high pressure and superb corrosion resistance. They are made of the best austenitic stainless steel grades and have smooth interior surfaces, exact dimensions and great resistance in tough environments. Some of the major uses of Stainless Steel Capillary Tubes include instrumentation, medical devices, chromatography, hydraulic machinery, chemical processes and laboratory equipment. We offer two types which are the Stainless Steel 316 Capillary Tubes which have greater resistance to chlorides and chemicals and Stainless Steel 304 Seamless Capillary Tubes which have great strength, welding characteristics and are suitable for hygienic applications. Our Stainless Steel Capillary Tubes come in seamless and welded forms and are produced according to international ASTM and ASME specifications.

Specifications of Stainless Steel Capillary Tubes

Property / Parameter	Specification Details
Material Grades	SS 304, SS 304L, SS 316, SS 316L
Specifications	ASTM A213 / ASME SA213, ASTM A249 / ASME SA249, ASTM A269, ASTM A312, ASTM A632
Outside Diameter (OD)	0.3 mm - 12.0 mm
Wall Thickness	0.08 mm - 0.2 mm
Type	As Welded, EFW, ERW, Seamless, Semi-Seamless, Bead Removed
Form	Round, Straight, Hydraulic, etc.
Finish Options	Pickled, Polished, Bright Annealed, Electrolytic Polished
Certification	Mill Test Certificate EN 10204 3.1
Packaging	Sleeved, Ends Capped, Wooden Boxed

Chemical Compositions of Stainless Steel Capillary Tubes

Element	304LUNS S30403	304UNS S30400	316LUNS S31603	316UNS S31600
(C) Carbon, max	0.035%	0.080%	0.035%	0.080%
(Mn) Manganese, max	2.0%	2.0%	2.0%	2.0%
(P) Phosphorus, max	0.045%	0.045%	0.045%	0.045%
(S) Sulfur, max	0.030%	0.030%	0.030%	0.030%
(Si) Silicon, max	1.0%	1.0%	1.0%	1.0%
(Ni) Nickel	8.0% - 12.0%	8.0% - 11.0%	10.0% - 14.0%	10.0% - 14.0%
(Cr) Chromium	18.0% - 20.0%	18.0% - 20.0%	16.0% - 18.0%	16.0% - 18.0%
(Mo) Molybdenum	-	-	2.0% - 3.0%	2.0% - 3.0%
(Fe) Iron	Balance	Balance	Balance	Balance
(Cu) Copper	-	-	-	-
(N) Nitrogen	-	-	-	-

Stainless Steel Capillary Tubes Mechanical Properties

Material Grade	Heat Treatment	Minimum Solution Temperature	Tensile Strength, Min	Yield Strength (0.2% Offset), Min	Elongation in 2 in. (50mm), Min
TP304	Solution Annealed	1900 F (1040 C)	75 Ksi (515 MPa)	30 Ksi (205 MPa)	35%
TP304L	Solution Annealed	1900 F (1040 C)	70 Ksi (485 MPa)	25 Ksi (170 MPa)	35%
TP316	Solution Annealed	1900 F (1040 C)	75 Ksi (515 MPa)	30 Ksi (205 MPa)	35%
TP316L	Solution Annealed	1900 F (1040 C)	70 Ksi (485 MPa)	25 Ksi (170 MPa)	35%

Pressure Rating Chart of Stainless Steel Capillary Tubes

Outer Diameter (OD)	Wall Thickness	Theoretical Burst Pressure (PSI)	Recommended Working Pressure (PSI)
0.50 mm (0.0197")	0.10 mm (0.0039")	22,500	5,625
1.00 mm (0.0394")	0.10 mm (0.0039")	12,000	3,000
1.00 mm (0.0394")	0.20 mm (0.0079")	25,000	6,250
1.50 mm (0.0591")	0.15 mm (0.0059")	12,500	3,125
2.00 mm (0.0787")	0.20 mm (0.0079")	12,000	3,000
3.00 mm (0.1181")	0.20 mm (0.0079")	7,800	1,950
6.00 mm (0.2362")	0.20 mm (0.0079")	3,800	950
1/16" (1.59 mm)	0.010" (0.254 mm)	18,800	4,700
1/16" (1.59 mm)	0.020" (0.508 mm)	38,500	9,625
1/8" (3.18 mm)	0.020" (0.508 mm)	19,200	4,800

Dimensions Chart of Stainless Steel Capillary Tubes

Nominal Outer Diameter (OD)	Wall Thickness Range	Outside Diameter Tolerance	Length Tolerance	Wall Thickness Tolerance
0.50 mm (0.0197")	0.08 mm - 0.15 mm	+/-0.010 mm (+/-0.0004")	+1.0 mm, -0 mm	+/-10.0%
1.00 mm (0.0394")	0.10 mm - 0.20 mm	+/-0.015 mm (+/-0.0006")	+1.0 mm, -0 mm	+/-10.0%
1.59 mm (1/16")	0.10 mm - 0.38 mm	+/-0.025 mm (+/-0.0010")	+2.0 mm, -0 mm	+/-10.0%
3.18 mm (1/8")	0.15 mm - 0.51 mm	+/-0.050 mm (+/-0.0020")	+3.18 mm, -0 mm	+/-10.0%
6.00 mm (0.2362")	0.20 mm - 0.89 mm	+/-0.050 mm (+/-0.0020")	+3.18 mm, -0 mm	+/-10.0%
9.53 mm (3/8")	0.20 mm - 1.20 mm	+/-0.075 mm (+/-0.0030")	+3.18 mm, -0 mm	+/-10.0%
12.00 mm (0.4724")	0.20 mm - 1.20 mm	+/-0.100 mm (+/-0.0040")	+3.18 mm, -0 mm	+/-10.0%

Types of Stainless Steel Capillary Tubes

SS 201 Capillary Tube.png

SS 304L Capillary Tube.png

SS 316 Capillary Tube.png

SS Capillary Tube.png

SS Seamless Capillary Tube.png

Stainless Steel 316L Capillary Tube.png

Stainless Steel Capillary Tube.png

Applications Uses of Stainless Steel Capillary Tubes

Medical & Healthcare Industry
Pharmaceutical Industry
Chemical Processing Industry
Oil & Gas Industry
Aerospace & Defense Industry
Instrumentation & Automation Industry

Frequently Asked Questions

What are Stainless Steel Capillary Tubes?

Stainless Steel Capillary Tubes are precision small-diameter tubes designed for accurate fluid and gas flow in applications requiring high strength, corrosion resistance, and dimensional accuracy.

What are Stainless Steel Capillary Tubes used for?

Stainless Steel Capillary Tubes are used in instrumentation, medical equipment, chromatography, hydraulic systems, chemical processing, and laboratory applications.

What is the difference between SS 304 and SS 316 Capillary Tubes?

SS 304 Capillary Tubes provide excellent corrosion resistance and are suitable for general applications, while SS 316 Capillary Tubes contain molybdenum, offering better resistance to chlorides, chemicals, and marine environments.

Are Stainless Steel Capillary Tubes corrosion resistant?

Yes. Stainless Steel Capillary Tubes offer excellent resistance to corrosion, oxidation, and many chemicals, making them suitable for demanding industrial applications.

Are Stainless Steel Capillary Tubes available in seamless and welded types?

Yes. Stainless Steel Capillary Tubes are available in both seamless and welded forms to meet different pressure, precision, and application requirements.

Stainless Steel Capillary Tubes Manufacturer and Suppliers