15mm Brass Tube Brush

A 15mm Brass Tube Brush is a round-head internal cleaning brush made with waved brass wire fill, a stainless steel stem or core, and a removable AISI 304 stainless steel handle. The standard configuration uses an 80 mm working head, a 180 mm handle, an 8 mm grip diameter, and a threaded connection. The finished tool is built to be pushed, pulled, and rotated by hand or at low speed inside a bore close to 15 mm in internal diameter.

In a heat exchanger or condenser, the head enters at the tube sheet face and follows the internal wall. The brass tips scrape and sweep deposits from the surface while the waved fill maintains contact through minor internal irregularities. The threaded connection lets the operator extend reach, swap heads, or attach the brush to a suitable driver in shops that use rotary cleaning.

This is a mechanical cleaning tool, not a chemical descaler or a replacement for hydroblasting. It works best on soft to moderate deposits that can be released by bristle contact. Hard mineral scale, baked carbon, or welded spatter will wear brass fill quickly and are usually handled better with a more aggressive brush type or a different cleaning process.

The standard build is listed below. Dimensions, fill, thread, and handle can be adjusted to a specific tube map or maintenance procedure.

If the brush will be used with a chemical cleaner, confirm the full material combination, brass fill, stem wire, and handle, against the cleaning chemistry before the first production run.

• Small-bore shell-and-tube heat exchangers, condensers, evaporators, sample coolers, and oil coolers with straight tube IDs near 15 mm. The brush removes light to moderate scale, sludge, corrosion film, and oil residue before a chemical flush or hydrotest.
• Copper, brass, bronze, cupronickel, and stainless steel tubes where harder steel wire can leave groove marks or remove base metal. Brass is the conventional first-pass hand tool for these alloys.
• Hydraulic and pneumatic component bores, valve ports, cross-hole intersections, threaded openings, and blind holes around 15 mm where chips, dried oil, and light corrosion need to be cleared before reassembly.
• Pump, compressor, and heat exchanger rebuild benches where internal bores must be cleaned and verified before new seals or tube plugs are installed.

This is a straight-bore tool. U-bend sections, serpentine paths, and tube IDs under about 14 mm require a different brush construction or diameter.

Start with the fouled inside diameter, not the outside diameter or the pipe schedule. A pin gage or an ID micrometer reading at the tube sheet tells you what will enter and what will contact the wall.

• If the fouled bore is between about 14.5 and 17 mm, the 15 mm fill is the right working zone. If the bore is under 14 mm, go down a diameter. If it is over 17 mm, the brush will contact only part of the wall.
• When the bore is heavily scaled, consider a smaller first-pass brush or chemical softening before the 15 mm brass head. Forcing an oversize brush through scale bends stems and folds fill.
• Choose brass when the tube is copper, brass, bronze, cupronickel, or stainless steel, surface preservation matters, and the deposit is soft or moderate. If the deposit is hard, sintered, or deeply carbonized, a stainless steel or carbon steel wire brush will cut faster and last longer.
• Check the total reach. The standard 80 mm head and 180 mm handle reach about 250 to 260 mm. Tubes longer than that need a threaded extension rod, a longer handle, or a longer head.
• If using a rotary driver, confirm the thread size, shank fit, and speed limit with your maintenance procedure. Brass fill fatigues fast at high RPM or when kinked at the tube sheet edge.
• For polymer linings, PTFE sleeves, or other non-metallic tube materials, switch to a nylon, PBT, or similar non-metallic tube brush. Brass will scratch or transfer into soft non-metallic surfaces.

The standard 15 mm size is a starting point, not a fixed limit. For a specific tube map or maintenance procedure, we can adjust the head, fill, stem, handle, and connection around the same brass-wire platform.

• Head diameter and length: 15 mm standard; adjacent diameters, longer or shorter heads, and stepped head profiles can be produced.
• Brass fill: filament gauge, waved or straight fill, fill density, and brush stiffness can be tuned to the deposit.
• Stem or core: length, diameter, flexibility, 304 or 316 stainless steel, and single or double-stem construction.
• Handle: overall length, grip diameter, knurling, loop or T-handle end, and coating if needed.
• Connection: thread size and pitch, male or female thread, collar, and extension-rod interface can be matched to existing tools.
• Identification and packaging: color coding, laser marking, individual bags, bulk boxes, or kit packing.

For critical maintenance programs that require material certificates, inspection records, documentation, or third-party testing, provide those project requirements during inquiry. We can support the documentation package along with the brush build.