DUAL DIAMETER Cleaning Pigs

Various sizes and configurations available

When pipelines transition between two diameters, standard cleaning pigs can lose sealing force or cleaning efficiency. Enduro’s Dual-Diameter Cleaning Pigs are engineered to navigate those transitions while maintaining consistent contact and debris-removal performance.

Built in Tulsa and designed for real-world field conditions, our dual diameter pigs help operators clean efficiently across reducers, diameter changes, and varying pipeline sections.

What Is a Dual Diameter Cleaning Pig?

A dual-diameter cleaning pig is designed to travel through pipelines with two different nominal diameters — such as 16” to 14” or 24” to 20” transitions — while maintaining effective sealing and cleaning action.


These pigs are commonly used in lines with reducers, expansion points, or variable diameter segments where a standard pig would be ineffective or risk bypass.

Yellow and black industrial brush head for a floor cleaning machine.

(Custom options available for unique applications.)

When Should You Use a Dual Diameter Pig?

Dual-diameter pigs are ideal when:

  • Your line includes diameter transitions
  • You need consistent cleaning across reducers
  • You are preparing for inline inspection (ILI)
  • Debris removal is required in variable diameter segments
  • Maintaining flow efficiency across transitions is critical

Cleaning Performance Across Diameter Changes

Enduro’s dual-diameter pigs are engineered to:

  • Maintain sealing force through diameter transitions
  • Remove wax, scale, and operational debris
  • Capture ferrous debris when configured with magnets
  • Support ILI preparation by improving line cleanliness
  • Reduce risk of stalled runs at reducers

Configurable to Your Pipeline Conditions

Dual-diameter pigs can be configured based on:

  • Pipeline diameters and reducer type
  • Product type (crude, refined products, gas, NGL, water)
  • Debris profile (wax, scale, metal fines, sludge)
  • Flow conditions
  • Maintenance vs. inspection preparation objectives

Available configuration options include:

  • Cups or discs
  • Brush elements
  • Magnetic elements
  • Gauge plates
  • Bypass systems
  • Specialty urethane formulations


Built for ILI Preparation

Proper cleaning is critical before an inline inspection run. Dual diameter pigs are frequently used in preparation programs to ensure inspection tools maintain consistent contact across diameter changes.

A clean line improves inspection data quality and reduces the risk of missed or masked anomalies.


Request a Quote

For sizing, configuration recommendations, or custom builds:  800-752-1628
jrm@enduropls.com, or submit a quick quote request online.

Browse all cleaning pigs

Why Choose Enduro?

  • 30+ years of cleaning pig expertise
  • Tulsa-built manufacturing
  • Custom configurations
  • Fast turnaround
  • Direct technical support from cleaning pig specialists

When your pipeline includes diameter transitions, precision matters. Our team works directly with operators to ensure the right configuration for reliable performance.

FAQs

  • What is a dual-diameter cleaning pig?

    A dual diameter cleaning pig is designed to move through pipelines that transition between two nominal diameters while maintaining sealing and cleaning effectiveness.

  • Can dual-diameter pigs include magnets or brushes?

    Yes. Magnetic and brush elements can be added depending on the debris type and cleaning objective.

  • Are dual-diameter pigs used before ILI?

    Yes. They are commonly used during cleaning programs prior to inline inspection to improve line cleanliness across diameter transitions.

  • How do I determine the correct dual-diameter configuration?

    Configuration depends on the two diameters, reducer geometry, debris profile, product type, and whether the run is for maintenance cleaning or ILI preparation.