Description

What Is a Scraper Pig?

A scraper pig is a pipeline cleaning tool that removes scale, wax, and rust from internal pipe walls. Operators launch it from a pig launcher and recover it at the receiver. EMT builds scraper pigs for oil and gas lines, water systems, and chemical plants. The tool seals the wall with cups or brushes and scrapes deposits loose. EMT offers foam, steel-frame, and solid-cast polyurethane styles. Foam pigs carry a transmitter for tracking and suit first inspection. Steel-frame pigs use leather bowls for strong sealing and soft-dirt removal. Solid-cast pigs clear heavy deposits in long-distance lines. Maintenance teams run them before commissioning and during routine pigging. They keep flow high and prevent costly blockages. EMT customizes size, density, and accessories per project. We also supply spare discs and brushes to extend service life. Our pigs pass bends, elbows, and reducers without jamming.

What Are the Key Parameters?

EMT sizes every scraper pig to the host pipeline, medium, and cleaning goal. The table below lists our standard parameters. Size spans 2 to  40 inch (DN50-DN1000). Body material includes polyurethane, medium-density foam, or a carbon steel frame. Polyurethane hardness reaches Shore 83 A. Foam density spans light, medium, and heavy grades. Cups or discs number two to four, in polyurethane or leather. Operating temperature reaches 80 C. We add wire brushes, spring brushes, gauging discs, transmitters, or magnets on request. Pressure rating follows the pipeline MAOP. Every unit meets ISO 9001 and ISO 14001, with ASME U Stamp on vessel parts. Choose foam pigs for light, one-pass inspection. Choose solid-cast polyurethane for heavy wax and scale. Steel-frame pigs suit soft-dirt removal in large lines. We match cup count and hardness to your medium. Our engineers review your pipeline data before finalizing specs.

Parameter	Value
Size Range	2″-40″ (DN50-DN1000)
Body Material	Polyurethane / Medium-density foam / Carbon steel frame
Surface Hardness	Shore 83 A (polyurethane)
Foam Density	Light 0.02-0.3 g/cm3 – Medium 0.08-0.12 – Heavy 0.13-0.16
Cups / Discs	2-4 pcs, polyurethane or leather
Operating Temp.	<= 80 C
Unit Weight	approx 5 kg (standard PU build)
Pressure Rating	Per pipeline MAOP
Optional Add-ons	Wire brush, spring brush, gauging disc, transmitter, magnets
Certifications	ISO 9001 – ISO 14001 – ASME U Stamp (vessel parts)

How Does the Scraper Pig Work?

The scraper pig seals the pipeline with cups or brushes. Product fluid pushes it forward by pressure differential. The cups separate liquids or gases at both ends. This creates the driving force. Brushes and blades scrape scale, wax, and rust from the wall. Loose debris gathers ahead of the pig and exits at the receiver. A transmitter inside the pig sends signals to track its position. Operators locate blockages by reading that signal during the run. Gauging discs measure pipe deformation and reveal dents or ovality. The pig repeats passes until the line is clean and verified. EMT sets cup angle and brush hardness for each medium and temperature. This keeps every run safe, smooth, and effective. We match polyurethane hardness to the deposit type. Soft wax needs flexible cups; hard scale needs stiff brushes. Our engineers confirm the cleaning plan before each launch.

Why Choose the Scraper Pig?

EMT builds the scraper pig to deliver reliable cleaning at a low lifecycle cost. Project teams choose it for five clear reasons.

• It removes tough deposits such as scale, wax, and rust in a single pass.
• The polyurethane body resists wear and survives many repeated cleaning runs.
• Custom sizes from 2 to 40 inch fit most pipeline diameters worldwide.
• An optional transmitter enables accurate in-line tracking and blockage detection.
• ASME-certified construction ensures safe, reliable performance under line pressure.

Tell us your pipe size, medium, and deposit type. We recommend the right style, density, and add-ons for you. Our team confirms the cleaning plan before production starts. We stock common sizes for fast dispatch and short lead times. Each pig ships with a test report and a spare parts list.

Who Is EMT and Why Trust Us?

EMT manufactures pipeline pigging equipment from its Shenyang factory. We hold the ASME U Stamp for pressure vessel production. Our workshop runs CNC machining centers, automatic welding stations, and a hydrostatic test bay. We pressure-test every product before shipment and attach a test certificate. EPC contractors, operators, and maintenance crews use our products in 30+ countries. We respect project schedules and offer expedited delivery when needed. Our engineers reply in English, Spanish, Russian, or Chinese within four working hours. Beyond pigs, we supply QOC closures, corrosion monitoring, and chemical injection quills. We deliver turnkey pigging systems from design through site commissioning. We can act as your single-source supplier for the entire pigging system. Founded in 2004, EMT combines R&D, production, and service in one team. Our 20 years of pigging experience support every custom order.