32mm SS316 Heat Exchanger Brush

A 32mm SS316 Heat Exchanger Brush is a cylindrical wire tube brush built around a twisted stainless steel 316 wire core. Stainless steel 316 bristles project radially from the core and form a round cleaning head measuring 120mm long. The remaining 250mm of the brush is the stem and grip, which the operator holds or clamps into a driver.

In use, the brush is inserted into the open end of a heat exchanger tube and moved back and forth, rotated by hand, or spun with a low-speed power driver connected through the threaded end. The bristle tips scrape the internal tube wall, loosening scale, rust, carbon deposits, coolant films, oil, and process residues. Loose debris is then flushed out with water, solvent, or compressed air as part of the same cleaning sequence.

This brush is a mechanical cleaning tool. It is not a chemical descaler and it does not replace flushing, passivation, or hydrotesting. It is specified when the tube ID is close to 32mm, the deposits are soft to moderately adherent, and the tube material can tolerate stainless steel wire contact. For soft metals such as copper, brass, or aluminum, a brass or nylon filament brush is often a safer choice because SS316 wire can leave scratches.

The SS316 grade matters because heat exchanger cleaning frequently involves acidic descalers, alkaline degreasers, or brackish process water. Standard carbon steel wire would rust almost immediately in these conditions and could contaminate the tube surface. SS316 wire resists corrosion and does not transfer rust to the tubes being cleaned.

The head diameter, head length, stem length, thread size, and wire diameter can be adjusted to match a specific tube bundle or drive system. If you are replacing an existing brush, provide the worn sample or a dimensional drawing so we can match the fit.

• Shell-and-tube heat exchangers with tube IDs between 30 and 34mm, where the brush is pushed through straight tube runs to remove water-side scale, silt, and biofilms.
• Condensers and chillers where soft fouling such as algae, sludge, and light mineral scale builds up on the inside of copper-nickel or stainless steel tubes.
• Boiler tubes and evaporator tubes when the internal deposit is loose rust, carbon, or soot that can be removed mechanically before chemical flushing.
• Process piping and straight cylindrical ports that collect oil, coolant residue, dried process fluid, or powder buildup and need a corrosion-resistant wire brush for periodic maintenance.
• Heat exchanger tube cleaning during turnaround or preventive maintenance, where a mechanical pass reduces chemical consumption and shortens the total cleaning time.

Avoid using this brush on heavily scaled tubes with hard, glassy mineral deposits unless the scale has first been softened with a chemical descaler. SS316 wire will polish hard scale but may not remove it quickly enough, and forcing the brush can bend the stem or pack the scale into the bristles.

Start with the actual tube ID. Measure the internal diameter of the tube after any liner or coating has been accounted for. The brush head should be 1–3mm larger than the tube ID to create enough interference for effective scrubbing. A 32mm head generally fits IDs from 29 to 33mm. If your ID is below 29mm, the brush will bind; if it is above 34mm, the bristle tips will not reach the wall reliably.

Match the stem length to the tube length. The 250mm handle works for tubes up to roughly 600mm when the operator holds the grip near the tube sheet. For longer tubes, you need a longer stem or a threaded extension rod. A stem that is too short forces the operator to reach inside, which reduces control and increases fatigue.

Check the drive connection. If you plan to rotate the brush with a power driver, confirm the thread size and pitch. The stock connection is threaded, but the thread can be changed to match your existing rods or adapters. Never run the brush above 500 rpm unless the brush is specifically built for high-speed use; excessive speed flattens the bristles and can cause the stem to whip.

Evaluate the tube material before choosing SS316. Stainless steel 316 wire is intended for stainless steel, carbon steel, or titanium tube surfaces. If the tubes are copper, brass, or aluminum, the SS316 bristles can scratch the surface, which may accelerate future fouling or create corrosion sites. In that case, choose a brass wire brush or a nylon filament tube brush instead.

Consider the deposit type. For soft films, oils, and light rust, a standard fill with 0.3–0.5mm wire is usually sufficient. For heavier carbon or scale, select a stiffer fill with larger diameter wire, or increase the fill density. If the deposit is very hard or baked on, a power-driven brush with a more aggressive fill may be needed, but that should be paired with chemical pre-treatment to avoid damaging the tube.

Yes. The 32mm SS316 heat exchanger brush can be configured to match your tube bundle and cleaning process. To define the custom configuration, we need the tube ID, tube length, tube material, deposit type, cleaning chemical, rotational speed, and the thread or drive interface you use.

We can adjust:

• Head diameter and length — from smaller diameters for tighter tubes to larger diameters for worn or oversized tube IDs, with head lengths from 50mm up to 200mm or more.
• Bristle wire — wire diameter from 0.2 to 0.8mm, fill density, and stainless steel grade (316 for corrosion resistance, 304 for lower cost).
• Stem and core — length from 100mm to over 1,000mm, twisted wire core flexibility, or optional rigid rod core for powered use.
• Connection — thread size and pitch, hex end, quick-release, or custom adapter to fit existing drive equipment.
• Grip and handle — plastic, metal, or loop handle; knurled or overmolded grip; color and marking for identification.
• Packaging — bulk box, individual polybag, or project-specific packing with labeling.

If your project requires material certificates, dimensional inspection reports, or third-party testing documentation, we can assist with those requirements during the customization process.