Compact Design SS304/316 Thin Wall Stainless Steel Round Capillary Tube

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Product Description

Basic Information
Model NO.
Capillary Tube
Type
Seamless
Technique
Cold Drawn
Material
Stainless Steel
Surface Treatment
Polished
Section Shape
Round
Wall Thickness
0.02--0.5mm
Max Length
2000 meters
Experience
Over 30 years
Capacity
3800 Tons/Year
Product Description
Stainless Steel Capillary Tube

Seamless Tubes require precision size tolerance and are primarily utilized in marine platforms, aerospace equipment, shipbuilding, and bullet trains. They are essential for instrument tubes, hydraulic brake systems, oil well control pipelines, and chemical injection systems.

Our facilities utilize advanced high-speed precision multi-roll mills and bright annealing furnaces. This technology allows us to achieve a diameter tolerance of up to 0.3%D and wall thickness tolerance of 3%S. The bright annealing process is conducted in a closed furnace under argon and nitrogen protection, ensuring a clean, oxide-free, and bright metal surface.

To guarantee the highest quality, our production lines include automatic heat piercing, temperature-controlled natural gas annealing, and precision cold-rolled equipment. Testing is rigorous, employing Germany-imported spectrometers, ultrasonic fault detectors, eddy current flaw detectors, and hydrostatic testing machines.

Available Materials
Austenitic Stainless Steel

304, 304L, 304H, 316, 316L, 316Ti, 316H, 321, 321H, 317L, 347, 347H, 310S, 310H, 309S.

Super Austenitic & Duplex Steel

904L (N08904), S31254, S31803, S32205, S32750 (2507), S32760.

Nickel & Titanium Alloys

Alloy 600, 625, 718, 800H, 825, C276, Monel 400, K500; Titanium GR1, GR2, GR5, GR9.

Product Parameters
Product Name Size Range Max Length Technic Delivery Status Surface Certificates
SEAMLESS TUBE OD: 2-38.1mm
WT: 0.2~3mm
Max 38M Cold-rolled / Cold Drawn Annealing / Bright Annealing Pickling, Bright, Polished ISO 9001/14001, PED, TUV, BV, CCS
Detailed Product Photos
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Our Advantages

Cost-Effective Solutions: Professional services and competitive pricing to give you a market edge.

One-Stop Procurement: Full-range stainless steel pipe products and streamlined transportation solutions.

Extensive Experience: Over 15 years in stainless steel pipe production and global sales service.

Remote Technical Support: Video call mill introductions and professional guidance to solve technical difficulties immediately.

Third-Party Inspection: We fully cooperate with SGS, TUV, BV, DNV-GL, and other inspection bodies to ensure quality.

Logistics Support: Seamless door-to-door shipment services to simplify your supply chain.

Frequently Asked Questions
What are the main applications for these capillary tubes?
They are widely used in hydraulic systems, aerospace instrumentation, medical devices, chemical injection lines, and marine platform control systems.
What is the range of wall thickness available?
We specialize in thin-wall tubes ranging from 0.02mm to 0.5mm, and up to 3mm for specific seamless applications.
How do you ensure the precision of the tube dimensions?
We use high-speed multi-roll mills that maintain diameter tolerances within 0.3%D and wall thickness tolerances within 3%S.
Can the tubes be bent or treated without cracking?
Yes, our bright annealing process ensures even insulation and superior mechanical performance, making the tubes ideal for bending and reaming.
What testing procedures do you perform?
Every batch undergoes rigorous testing including ultrasonic and eddy current flaw detection, hydrostatic tests, and spectrometer analysis.
Do you provide customized lengths?
Yes, we can provide continuous lengths up to 2000 meters depending on the material and diameter specifications.

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