Description

What Is a Wire Brush Pig?

A wire brush pig is a polyurethane foam tool fitted with embedded wire brushes that scrub tough deposits from pipeline interiors. EMT manufactures these pigs on a flexible open-cell foam core wrapped in a criss-cross polyurethane coating with steel or nylon brush straps. Operators launch them from standard pig launchers using product flow, water, or air to clean crude oil, natural gas, water, and petrochemical lines. The wire brush foam pig removes mill scale, rust, wax, paraffin, and construction debris that foam pigs alone cannot shift. It suits new pipeline pre-commissioning, where it clears welding slag and dirt before commissioning, and on-stream maintenance on tuberculated or scaled lines. The pig travels bi-directionally through 90-degree bends, valves, and reducers without scoring coated walls. Many crews run a wire brush pig ahead of a gauge plate or smart inspection pig to verify the line is clean and round.

What Are the Key Parameters?

Engineers select each wire brush pig by line diameter, deposit hardness, and duty length. Our standard build covers 2 to 60 inch and offers low, medium, and high foam density. The table lists core specs we keep in stock. We also supply criss-cross, single-spiral, and total-wire brush layouts, plus nylon brushes for internally clad or plastic lines. Each pig oversizes 5-10% against the bore for a firm seal. We machine and coat bodies in our own shop, so lead times stay short. Every order ships with a size certificate and a pressure-test report. Share your pipe ID, medium, and debris type, and we confirm the exact configuration. Drawings follow your line standard so the pig drops in without field modification. Custom lengths and brush grades keep multi-run jobs on one delivery plan.

Parameter	Value
Body material	Open-cell polyurethane foam, criss-cross PU coat
Size range	2″-60″ (DN50-DN1500)
Foam density	Low 2-3, Medium 5-7, High 8-10 lb/ft3
Brush types	Single-spiral, criss-cross, total-wire
Brush material	Carbon steel / stainless steel / nylon
Oversize	5-10% vs pipe ID
Direction	Bi-directional (double-dish)
Options	Pull rope, transmitter cavity, gauge plate
Standard	NACE MR0175 (sour service)

How Does the Wire Brush Pig Work?

EMT’s wire brush pig works on line pressure alone, with no external power. The operator inserts it into the launcher, sized 5-10% larger than the bore for a tight seal. Driving fluid or gas pushes it forward through the pipe at a controlled speed. The wire brushes embedded in the foam body scrape rust, scale, and wax from the wall as the pig moves. Criss-cross and total-wire layouts put more bristles on the wall for heavier scale. The loosened debris travels ahead of the pig to the receiver. Crews retrieve the pig and check brush wear before the next pass. Optional transmitter cavities or magnets let teams track its position in real time. One pass clears loose scale and light deposits; several passes remove stubborn tuberculation. Bypass stays low because the foam fills the bore as it compresses, keeping drive pressure efficient.

Why Choose the Wire Brush Pig?

EMT’s wire brush pig gives operators clear advantages for tough cleaning:

• It scrapes rust, mill scale, and wax that bare foam pigs leave behind.
• Criss-cross and total-wire layouts boost wall contact for heavy scale.
• Nylon brushes clean clad and plastic lines without scratching the coating.
• It bends through 90-degree elbows, valves, and reducers that stop rigid pigs.
• Bi-directional double-dish design cleans both ways without retrieval.

Every pig passes a pressure test and ships with a size certificate for traceability. EMT tunes density, brush type, and oversize to your exact duty for the best wear life. Lightweight foam needs only low launch pressure, protecting older fittings. For lined or internally coated pipe, the soft body avoids the scoring that steel cups can cause. Our engineers help you pick the right type before you order, so the first run succeeds.

Who Is EMT and Why Trust Us?

EMT is a Shenyang-based manufacturer of pipeline pigging and cleaning equipment, certified with the ASME U Stamp for pressure vessels. Our plant runs CNC machining centers, automatic welding stations, and a hydrostatic test bay that control quality at every step. We pressure-test each pig before shipment and attach a test certificate to every order for full traceability. EPC contractors, pipeline operators, and maintenance crews in 30-plus countries run our gear in the field. We respect tight turnaround schedules and offer expedited delivery when outages are short. Our engineers reply in English, Spanish, Russian, or Chinese within four working hours. Beyond wire brush pigs, we supply QOC quick-opening closures, corrosion monitoring systems, chemical injection quills, and full pipeline cleaning pigs. We deliver turnkey pigging solutions from design through commissioning. As a single-source supplier, we cover your full system under one quality standard. Every build meets NACE MR0175 for sour service.