Brass Capillary tubes,Brass Capillary Tube Manufacturer Brass Capillary Tube Supplier,Brass Capillary Tube ExporterBrass Precision Tubing,Brass Capillary Small Diameter Tube Brass Instrumentation Tubes
Brass capillary tubes are precision-engineered hollow cylinders made from brass alloy, widely used in industries that require controlled fluid flow. Their small internal diameter and thin walls allow for precise regulation of liquid or gas movement, making them essential components in refrigeration, air conditioning, and instrumentation systems.
Brass, an alloy of copper and zinc, is favored for manufacturing capillary tubes due to its excellent corrosion resistance and thermal conductivity. These properties ensure that brass capillary tubes withstand harsh environments while efficiently transferring heat, which is crucial in applications like HVAC systems and refrigeration.
The production of brass capillary tubes involves processes such as extrusion, drawing, and annealing. These steps ensure the tubes achieve tight dimensional tolerances and a smooth internal surface, which are necessary for consistent fluid flow and preventing blockages in the system.
In HVAC and refrigeration units, brass capillary tubes function as metering devices that regulate refrigerant flow between the condenser and evaporator. Their precise bore size controls pressure drop and flow rate, contributing to system efficiency and preventing compressor damage.
Specification of Brass Capillary tubes
| Parameter | Specification |
|---|---|
| Material | Brass (Typically C26000, C27200, or C12200) |
| Outer Diameter (OD) | 1.0 mm to 6.0 mm |
| Inner Diameter (ID) | 0.3 mm to 5.5 mm |
| Wall Thickness | 0.1 mm to 0.5 mm |
| Length | Custom lengths or standard 5 m / 10 m coils |
| Tolerance (OD/ID) | ±0.05 mm to ±0.10 mm |
| Hardness | Soft / Half-Hard / Full-Hard |
| Temper | Annealed or as specified |
| Density | 8.4 – 8.7 g/cm³ |
| Tensile Strength | 250 – 500 MPa (Depending on temper) |
| Thermal Conductivity | ~110 W/m·K |
| Operating Temperature | -40°C to +200°C |
| Corrosion Resistance | Excellent in air, water, and mild chemicals |
| Standard Compliance | ASTM B135 / B68 / JIS H3300 / EN Standards |
| Applications | HVAC, Refrigeration, Instruments, Gas Lines |
Compared to steel or copper tubes, brass capillary tubes offer a balance of strength, flexibility, and corrosion resistance. Brass is easier to machine and bend without cracking, which allows for versatile installation in tight or complex spaces.
Chemical Composition of Brass Capillary tubes
| Element | C26000 (Cartridge Brass) | C27200 (Yellow Brass) | Typical Range for Capillary Tubes |
|---|---|---|---|
| Copper (Cu) | 68.5% – 71.5% | 62.0% – 65.0% | 63% – 71% |
| Zinc (Zn) | Remainder | Remainder | Balance (29% – 37%) |
| Lead (Pb) | ≤ 0.07% | ≤ 0.07% | ≤ 0.07% |
| Iron (Fe) | ≤ 0.05% | ≤ 0.10% | ≤ 0.10% |
| Tin (Sn) | ≤ 0.05% | ≤ 0.05% | ≤ 0.05% |
| Other Elements | ≤ 0.10% (total) | ≤ 0.10% (total) | ≤ 0.10% (total) |
With a proven track record as a Brass Capillary tubes exporter in over 30 countries, Sumer Metal Industries ensures global availability, third-party inspection support, and client-specific customization. Our wide export network combined with strict quality standards has made us a preferred choice for SS Grade3 tubing worldwide.
Specification of Brass Capillary tubes
| Parameter | Specification |
|---|---|
| Material | Brass (Typically C26000, C27200, or C12200) |
| Outer Diameter (OD) | 1.0 mm to 6.0 mm |
| Inner Diameter (ID) | 0.3 mm to 5.5 mm |
| Wall Thickness | 0.1 mm to 0.5 mm |
| Length | Custom lengths or standard 5 m / 10 m coils |
| Tolerance (OD/ID) | ±0.05 mm to ±0.10 mm |
| Hardness | Soft / Half-Hard / Full-Hard |
| Temper | Annealed or as specified |
| Density | 8.4 – 8.7 g/cm³ |
| Tensile Strength | 250 – 500 MPa (Depending on temper) |
| Thermal Conductivity | ~110 W/m·K |
| Operating Temperature | -40°C to +200°C |
| Corrosion Resistance | Excellent in air, water, and mild chemicals |
| Standard Compliance | ASTM B135 / B68 / JIS H3300 / EN Standards |
| Applications | HVAC, Refrigeration, Instruments, Gas Lines |
🏭 Industry & Application
- ✅ Brass Capillary Tubes for Medical Industry
- ✅ Brass Capillary Tubes for Chemical Processing
- ✅ Brass Capillary Tubes for Instrumentation Lines
- ✅ Brass Capillary tubes for Gas & Liquid Flow
- ✅ Brass Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1: What are brass capillary tubes?
Brass capillary tubes are thin, small-diameter tubes made from brass alloy, designed for precise control of liquid or gas flow in systems like refrigeration, air conditioning, and instrumentation.
Q2:What are the common applications of brass capillary tubes?
They are widely used in HVAC systems, refrigerators, freezers, pressure gauges, fuel lines, and other applications requiring controlled fluid metering or pressure reduction.
Q3:Why is brass used for capillary tubes instead of copper or steel?
Brass offers a good balance of corrosion resistance, machinability, thermal conductivity, and durability. It is also easier to form and bend than copper or steel, making it suitable for complex installations.
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At Sumer Metal Industries Pvt. Ltd., we follow a zero-defect policy by implementing stringent quality checks, using certified raw materials, and continuously improving our processes to deliver reliable and consistent tubing solutions
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