Φ5-16mm Stainless Steel Capillary Tube Small Diameter Precision
16mm stainless steel capillary tube
,stainless steel capillary tube small diameter
,16mm stainless capillary tube
Φ5-16mm Stainless Steel Capillary Tube, small-diameter precision tube
What is Stainless Steel Capillary Tube?
A stainless steel capillary tube is a small-diameter precision tube, typically with an outer diameter (OD) of 5 mm to 16 mm and wall thicknesses as thin as 0.5 mm. The name "capillary" refers to its fine, hair-like dimensions. These tubes are manufactured to extremely tight tolerances and feature smooth internal and external surfaces. They are commonly used in medical, analytical, and precision instrumentation applications.
Why Choose Stainless Steel Capillary Tubes?
Stainless steel capillary tubes offer excellent corrosion resistance, high dimensional accuracy, and superior surface finish. They withstand high pressure and resist chemical attack from acids, alkalis, and organic solvents. The small internal diameter allows for precise fluid control and minimal sample volume. They are also flexible enough for coiling and can be supplied in long continuous lengths without welds.
Process Overview
Stainless steel capillary tubes are manufactured through a specialized cold drawing process. Starting from a larger diameter seamless or welded tube, the tube is pulled through a series of progressively smaller dies at room temperature. Each drawing pass reduces the outer diameter and wall thickness while increasing length. Intermediate annealing (heat treatment) is performed between passes to relieve stress and restore ductility, preventing cracking. For ultra-small diameters (below 1 mm), multiple drawing passes with diamond dies may be used. After reaching final dimensions, the tube is straightened, cut to precise lengths, and cleaned to remove any lubricants or contaminants. The final surface may be left as-drawn, polished, or electropolished depending on application requirements.
304, 304L, 316, 316L, 310S, 321, etc
- Outer diameters: 5-16mm
- Wall thickness: 0.5-2mm
- Length and tolerance please contact us for inquiries
| Industry | Applications |
|---|---|
| Medical | Hypodermic needles, catheters, surgical instruments, endoscopic sheaths, dental tools |
| Analytical Chemistry | HPLC (high-performance liquid chromatography) tubing, gas chromatography lines, sample loops |
| Electronics | Antenna elements, sensor sheaths, wire protection tubes, thermocouple sheaths |
| Automotive | Fuel injection lines, brake lines, sensor tubes, air conditioning lines |
| Aerospace | Hydraulic lines, pneumatic controls, instrument lines, cooling loops |
| Instrumentation | Pressure gauge tubes, thermometer sheaths, flow meter components |
| Laboratory | Micro-reactors, gas sampling lines, chemical injection lines |
| Semiconductor | Ultra-pure gas and chemical distribution lines, vacuum system components |
Stainless steel can be magnetic depending on its internal structure. Austenitic grades like 304 and 316 are normally non-magnetic, but ferritic (430) and martensitic (410) grades are magnetic due to their different crystal structure. Even 304 or 316 may become slightly magnetic after cold working such as bending or stamping, which transforms some austenite into martensite. Therefore, magnetism does not indicate quality — it simply reflects the steel's microstructure and processing history.
For standard materials and sizes held in stock, delivery is guaranteed within 3 days of payment receipt. For products requiring custom dimensions or surface finishes, the lead time is 7 to 15 working days after payment confirmation. Specific delivery schedules should be confirmed with customer service at the time of order placement.
A substantial inventory is maintained to ensure prompt delivery. Stock availability varies by material grade and dimensions. To avoid potential delays, please confirm current stock levels with your sales representative prior to placing an order.
Applicable product standards must be specified at the time of order. For projects with specific technical requirements, please provide detailed parameters, tolerance ranges, and other relevant specifications. A dedicated quality inspection department oversees all stages of production to ensure full compliance. Upon completion, accurate measurements, inspection images, video documentation, and material test reports are provided for customer confirmation.
Complimentary samples are available in any size; however, international shipping fees apply. These charges are deductible from future order payments following formal cooperation. Customized samples are also available for a fee. For further details, please consult your sales representative.
Custom markings on outer packaging are available upon request at no additional cost. Once the marking design is approved, it will be affixed using waterproof tape. If no specific marking is requested, packaging will be shipped without markings by default.
Material grade, dimensions, and other identifying information may be spray-marked directly onto the steel plate surface upon request. For applicable charges, please consult your sales representative.
Standard wooden pallet packaging is provided at no extra cost, with a loading capacity of 1 to 3 tons per pallet. Alternative packaging options, such as iron pallets, are available upon request. Please contact your sales representative for details — bulk orders qualify for preferential pricing.
We maintain partnerships with multiple freight forwarders to offer competitive land, air, and sea freight options. If you have a preferred freight forwarder, we can arrange delivery to your agent's warehouse or to the designated port of shipment.
Factory inspections and product inspections are fully supported. Customers are welcome to visit our facility for in-person inspections. Alternatively, third-party inspection agencies, including SGS, may be arranged to conduct on‑site inspections.
