Pipeline pigging uses different types of cleaning pigs depending on pipeline conditions, debris levels, and inspection requirements. Selecting the right pipeline pig is critical for effective cleaning, batching operations, and preparation for inline inspection (ILI).

This pipeline pig comparison guide breaks down the most common pipeline pig types used in pigging operations—including cleaning pigs, batching pigs, urethane pigs, foam pigs, and inspection tools—helping operators choose the right pig for their application.

Enduro Pipeline Services manufactures a wide range of pipeline cleaning pigs, including STS pigs, Advantage steel-bodied pigs, dual diameter pigs, urethane pigs, and foam pigs, used in pipeline pigging and pre-ILI cleaning programs.

PIPELINE Pig Types: Cleaning, Batching & Inspection Pigs Explained

Pipeline pigging is widely used across oil, gas, water, and industrial pipeline systems to maintain flow efficiency and prepare for inline inspection. Operators use several different pig designs depending on pipeline conditions, debris levels, and inspection preparation requirements. Common pipeline pig types include STS cleaning pigs, steel-bodied Advantage pigs, dual diameter pigs, urethane pigs, and foam pigs. Each pig type offers different cleaning force, flexibility, and durability depending on the application.

Engineers often select pig types based on:

• Pipeline diameter and wall condition
• Debris type (scale, wax, sand, mill scale)
• Required sealing capability
• Whether the run is for pre-ILI cleaning
• Changes in pipeline diameter

Enduro Pipeline Services manufactures a wide range of pipeline cleaning pigs designed for reliable pigging performance and effective debris removal prior to inline inspection.

How to Choose the Right Pipeline Cleaning Pig

Selecting the right pipeline cleaning pig depends on several key factors:

Pipeline diameter and wall condition
Debris type (wax, scale, sand, mill scale)
What pig to use for wax removal
Flow rate and operating pressure
Sealing requirements
Whether the run is for pre-ILI cleaning or routine maintenance

Choosing the wrong pig can result in poor cleaning performance, inefficient runs, or inaccurate inspection data. Matching the pig design to pipeline conditions ensures better results and more reliable operations.

When to Use Each PIPELINE Cleaning Pig Type:

STS Cleaning Pigs

STS pigs are designed for aggressive cleaning and debris removal. Their cup design allows them to navigate fittings and wall changes while maintaining a strong seal against the pipe wall.

Advantage Cleaning & Batching Pigs

Advantage pigs are ideal for standard pipeline cleaning and batching operations where operators require durable pigs that can handle multiple runs.

Dual Diameter Cleaning Pigs

Dual diameter pigs are engineered to travel through pipelines that include reducers or transitions between different diameters while maintaining cleaning performance.

Bi-Directional Cleaning Pigs

Bi-directional pigs are commonly used during hydrostatic testing, where pigs must travel in both directions for filling and displacement operations.

Urethane Cleaning Pigs

Urethane pigs provide durable sealing and flexibility, making them well-suited for routine cleaning and batching programs.

Foam Cleaning Pigs

Foam pigs are typically used for light cleaning, drying operations, or short pipeline runs where flexibility is required.

While foam pigs can be useful for light cleaning or drying operations, most pipeline cleaning programs benefit from more durable pig designs that provide stronger sealing and longer service life. Steel-bodied and urethane pigs are often preferred when pipelines contain significant debris, wax, scale, or other contaminants.

Best Applications for Each Cleaning Pig Type

Not every cleaning pig is designed for the same job. The best pig for your pipeline depends on the line conditions, debris type, cleaning objective, and whether the run is part of a routine maintenance program or preparation for inline inspection.

STS Cleaning Pigs
Best for demanding cleaning and batching applications where durability, sealing, and reliable travel through challenging pipeline features are important.

Advantage Cleaning Pigs
Best for aggressive cleaning programs, heavy debris removal, and applications that require a rugged steel-bodied pig with configurable cleaning components.

Dual Diameter Cleaning Pigs
Best for pipelines with diameter transitions where a standard pig may struggle to maintain sealing contact through size changes.

Bi-Directional Cleaning Pigs
Best for lines where the pig may need to travel in either direction or where operational flexibility is required.

Urethane Cleaning Pigs
Best for routine cleaning, batching, liquid displacement, and general maintenance pigging.

Foam Pigs
Best for light cleaning, drying, or low-demand applications where flexibility is needed, but aggressive cleaning is not required.

What Happens If You Use the Wrong Cleaning Pig?

Choosing the wrong cleaning pig can create more problems than it solves. If the pig does not seal properly, product can bypass the tool instead of pushing debris forward. If the pig is too aggressive, it may create unnecessary wear or operating concerns. If it is not aggressive enough, debris, wax, scale, liquids, or black powder may remain in the line.

Using the wrong pig can lead to:

Poor debris removal
Reduced flow efficiency
Inconsistent pig travel
Increased risk of stuck or stalled tools
Extra cleaning runs
Delayed inspection schedules
Poor inline inspection data quality

That is why pig selection should be based on actual pipeline conditions, not just the pipe size. Enduro helps operators choose cleaning pigs based on the goal of the run, line configuration, debris type, and inspection requirements.

Not Sure Which Cleaning Pig You Need?

No need to guess. Enduro can help you compare cleaning pig options and choose the right tool for your pipeline conditions.

Call 800-752-1628 or request a quote:
https://www.enduropls.com/quick-quotepage

Want to see how cleaning pigs are built? Schedule a tour or pigging class at our Tulsa facility:
https://www.enduropls.com/schedule-a-tour-or-class

What are the different types of pipeline cleaning pigs?
Common pipeline cleaning pig types include STS pigs, steel-bodied pigs, dual diameter pigs, urethane pigs, and foam pigs. Each pig type is designed for different pipeline conditions and cleaning objectives.
How do operators choose the right pipeline cleaning pig?
Operators select cleaning pigs based on pipeline diameter, debris type, flow conditions, and operational goals such as cleaning, batching, or preparing the pipeline for inline inspection.
Which cleaning pigs are used before inline inspection (ILI)?
Aggressive cleaning pigs such as steel-bodied pigs, dual diameter pigs, or urethane pigs are commonly used to remove debris and ensure inspection tools maintain proper contact with the pipe wall.

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Pipeline Pig Types Comparison

Compare Foam, Urethane, Brush & Dual Diameter Pipeline Pigs