Pure Copper 110 Seamless Tube — Small Copper Tubing

Pure copper 110 seamless tube — also called small copper tubing, seamless copper pipe, or hollow copper tube — is a hollow, seamless copper tube drawn from 99.9% pure copper 110, with no welded seam along its length. Small copper tubing is chosen for cooling coils, refrigerant and fluid lines, gas and oil delivery, instrumentation and laboratory systems, heat exchangers, manifold and nozzle components, and DIY bending and flaring projects. The seamless wall bends, flares, brazes, and solders cleanly, and the inner bore is smooth and continuous for dependable flow.

This small-diameter range is selected by its outer diameter (OD) with a fixed standard wall, supplied in straight lengths or cut to the exact length your assembly requires, across the United States. Other wall thicknesses are handled as custom requirements for orders that need thicker or thinner walls.

What Is Seamless Copper Tube?

Pure copper 110 is commercial-grade 99.9% pure copper valued for high thermal and electrical conductivity, natural corrosion resistance, and excellent ductility. In seamless tube form it is drawn as a hollow product with a continuous, uniform wall and no welded seam, which gives a smooth bore, a clean exterior for bending and flaring, and dependable behavior under forming and joining. In US usage, tube is specified by actual outer diameter and wall thickness (the way industrial, instrumentation, and small cooling lines are sized), while pipe refers to nominal plumbing sizes such as Type K/L/M. Buyers search this product as “seamless copper tube,” “small copper tubing,” “copper tubing by OD,” “thin copper tube,” and “hollow copper tubing.”

Outer Diameters, Wall & Sizing

This product is selected by outer diameter (OD), with the standard fixed wall. The inner bore is simply the OD minus two wall thicknesses. Choose the OD variant, then specify your length. The standard small OD range and approximate inch equivalents are listed below.

All OD sizes are supplied with the standard fixed wall; the inner bore is shown in the order details. Larger hollow sections are not part of this small-tubing range, and other wall thicknesses can be specified as custom orders. Solid conductor stock is supplied as round bar, and thin flexible conductor as copper wire, in the copper tube collection.

Key Properties of Pure Copper 110 Seamless Tube

Why Choose Small Seamless Copper Tubing

• Excellent heat transfer — copper is the standard material for cooling coils, refrigerant lines, and small heat exchangers.
• Smooth, seamless flow — the continuous bore suits fluids, gases, oils, and instrumentation lines without a seam.
• Easy to bend and flare — small tubing forms tight, controlled bends and takes clean flare and compression fittings.
• Reliable joining — brazes and solders into watertight joints for permanent apparatus, appliance, and coil assemblies.
• Compact OD range — 3 mm to 18 mm covers the small-bore sizes used in electronics cooling, labs, and machinery.
• Cut to length — receive straight or pre-cut tubing in the exact length the coil, manifold, or assembly requires.

How to Order Seamless Copper Tube

Common Applications

Industries That Use Small Copper Tubing

• HVAC & refrigeration — refrigerant, cooling, and heat-exchanger lines and coils.
• Electronics & power cooling — water-cooled equipment, cold plates, and induction cooling circuits.
• Instrumentation & laboratory — small-bore fluid, gas, and analytical apparatus lines.
• Machinery & automation — lubrication, coolant, pneumatic, and hydraulic-adjacent lines.
• Medical & dental equipment — cooling and gas delivery circuits in compact devices.
• DIY, hobby & fabrication — custom coils, stills, model engineering, and flared assemblies.

Working & Fabrication Notes

Pure copper 110 seamless tube bends with standard tube benders to tight, controlled radii and flares, expands, and swages with conventional tubing tools for flare and compression fittings. It cuts cleanly with a tube cutter and deburrs readily for smooth flow. Joints are made by brazing, soldering, or compression fittings, giving permanent watertight and gas-tight connections. The seamless wall resists splitting during flaring and forming, and the natural copper surface resists atmospheric corrosion and takes solder readily. Before bending, small tubing should be cut square and deburred so the bore stays open and fittings seat correctly.

Tube vs Pipe

• Tube is specified by actual outer diameter and wall thickness — the way industrial, instrumentation, and small cooling lines are sized (this product).
• Pipe is specified by nominal trade sizes and is associated with plumbing and HVAC distribution types, which are not part of this small-tubing range.
• Both are hollow; the difference is the sizing convention, not the copper itself.

Custom Cut Lengths & Custom Walls

Pure copper 110 seamless tube is supplied in standard straight lengths or cut to the specified length in millimeters or inches. Repeated identical pieces for coils, manifolds, cooling runs, and apparatus can be pre-cut to the same dimension. Outer diameters outside the standard range or a different wall thickness are handled as custom orders; such requirements add handling time according to the difficulty and complexity of the work, and pieces are then supplied to the confirmed OD and wall.

Shipping & Delivery

Pure Copper 110 Seamless Tube FAQ