Sihe Steel Sihe Steel

Wholesale ASTM A269 304 304L stainless steel capillary tubing Supplier, Factory

1.Production standards: ASTM A269/A249 2.Stainless steel material :304 304L 316L(UNS S31603) Duplex 2205 (UNS S32205 & S31803) Super Duplex 2507 (UNS S32750) Incoloy 825 (UNS N08825)  Inconel 625 (UNS N06625) 3. Size range: diameter 3MM(0.118”-25.4(1.0”)MM 4. Wall thicknesses: 0.5mm (0.020’’) to 3mm (0.118’’) 5.General delivery pipe status: half hard / soft bright annealing 6.The tolerance range: diameter: + 0.1mm, wall thickness: + 10%, length: -0/+6mm 7.Coil lengthsup to: 500MM-13500MM (45000feet)(can be adjusted according to customer requirements)

Product Description

Manufacturing Range
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Capillary Tubes Overview
Stainless steel capillary and stainless steel small tubes are widely used in medical treatment, fiber-optics, pen making, electronic welding products, light cable joints, food, vintage, dairy, drinks, pharmacy, and biochemistry. Different lengths can be provided according to specific requests.
Precision Tolerances
Capillary tubes with a maximum bore of 0.0158 in. are available in a wide range of stainless steels. These capillary tubes are characterized by tight tolerances, and the inside surface of the tubes is free from oil, grease, and other particles. This ensures, for example, an optimized and even flow of liquids and gases from the sensor to the measuring instrument.
Product Configurations & Grades
Stainless steel Coiled tubing is available in a range of different product forms depending on the customer requirements. Manufacturing range includes welded and seamless tube products.
Standard Grades Available: 304, 304L, 316L (UNS S31603), Duplex 2205 (UNS S32205 & S31803), Super Duplex 2507 (UNS S32750), Incoloy 825 (UNS N08825), Inconel 625 (UNS N06625). Other grades of stainless steel in duplex, superduplex, and nickel alloy are available on request.
Size Specifications: Diameter from 3mm (0.118’’) to 25.4mm (1.00’’) OD. Wall thickness from 0.5mm (0.020’’) to 3mm (0.118’’). Tubing can be supplied in the annealed or cold worked stainless steel control line pipe condition.
Stainless steel capillary tubing
Size of Stainless Steel Capillary Tube
capillary tube
Specification & Factory Showcase
Quality Advantage
Product quality for the control line in the oil and gas sector is assured not just during the controlled manufacturing process but also by way of finished product testing. Typical tests include:
  • Non-destructive tests
  • Hydrostatic tests
  • Surface finish controls
  • Dimensional accuracy measurements
  • Flare and coning tests
  • Mechanical and chemical property testing
Applications of Capillary Tube
01 Medical device industry
02 Industrial temperature control & sensors
03 Pens care industry core tube
04 Micro-tube and precision antennas
05 Electronic small-diameter applications
06 Jewelry needle punch
07 Watches and instrumentation
08 Car antenna tube & bar antennas
09 Laser engraving equipment tubes
10 Fishing gear and accessories
11 Diet and food industry capillary use
12 Mobile phone and computer stylus
13 Heating pipe and oil industry
14 Printers and silent box needles
15 Double-melt window-coupled tubes
16 Precision industrial small diameter tubes
17 Precision dispensing needles
18 Microphone and headphone components
Packaging & Finished Products
Related Products
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Frequently Asked Questions (FAQ)
What size ranges are available for the stainless steel capillary tubes?
The capillary tubes are available in diameters ranging from 3mm (0.118’’) to 25.4mm (1.00’’) outer diameter (OD). The wall thickness ranges from 0.5mm (0.020’’) to 3mm (0.118’’). A maximum bore of 0.0158 in. is also available for specialized capillary applications.
What material grades are standard for the coiled tubing?
Standard grades include 304, 304L, 316L (UNS S31603), Duplex 2205 (UNS S32205 & S31803), Super Duplex 2507 (UNS S32750), Incoloy 825 (UNS N08825), and Inconel 625 (UNS N06625). Other specialized duplex, superduplex, and nickel alloys can be manufactured upon request.
What quality testing processes do the control line tubes undergo?
To guarantee maximum reliability in demanding environments like oil and gas, the products undergo non-destructive tests, hydrostatic testing, surface finish controls, dimensional accuracy measurements, flare and coning tests, and comprehensive mechanical and chemical property evaluations.
What are the main applications of these precision capillary tubes?
They are widely used across multiple industries including medical devices, industrial temperature sensors, instrumentation, automotive antennas, laser engraving equipment, micro-electronics, heating systems, and downhole completion tools for the oil and gas sector.
In what conditions can the stainless steel control line pipes be supplied?
The tubing can be supplied in either annealed or cold-worked stainless steel control line pipe conditions, depending on specific structural and project requirements.

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