How to Remove Pipeline Residue? 4 Methods Compared with Pigging System Solutions

During the production of fluid products such as lubricants, petrochemicals, paints & coatings, adhesives, new energy materials, and food & beverages, a certain amount of product residue inevitably remains inside pipelines.

If not properly handled, these residues can lead to significant product losses, increased cleaning costs, longer changeover time, and risks of cross-contamination.

So, how can pipeline residue be removed efficiently?
Currently, industrial plants mainly use the following methods.

1. Manual Purging

Manual purging uses compressed air or nitrogen to push residual materials out of the pipeline.

Advantages:

• Low equipment investment
• Simple operation

Disadvantages:

• Cannot effectively remove high-viscosity materials
• Low product recovery rate
• May cause material splashing and environmental contamination
• Limited performance in long-distance or complex pipeline systems

This method is mainly suitable for low-value and low-viscosity fluids, but is not ideal for high-value product manufacturing.

2. Solvent or Water Flushing

This method uses water, cleaning agents, or organic solvents to flush residual materials from pipelines.

Advantages:

• Good cleaning performance
• Mature and widely used process

Disadvantages:

• Requires large amounts of cleaning fluids
• Generates wastewater and increases disposal costs
• Cannot recover valuable products
• Requires long cleaning time and reduces production efficiency

For plants with frequent product changeovers, this method often results in higher operating costs.

3. CIP Cleaning System (Clean-in-Place)

A CIP system automatically cleans equipment and pipelines by circulating cleaning fluids through the system.

Typical applications include:

• Lebensmittel und Getränke
• Dairy processing
• Pharmaceutical
• Cosmetics industries

Although CIP systems can meet strict hygiene requirements, their primary purpose is cleaning, not product recovery.

For high-value materials, product recovery is usually required before CIP cleaning.

In addition, for high-viscosity, low-flowability, or wall-adhesive materials such as lubricants, greases, coatings, resins, and battery slurries, relying only on CIP circulation may require longer cleaning cycles and consume more cleaning media.

4. Pigging System — A More Efficient Solution for Pipeline Residue Removal

For companies requiring frequent product changeovers, high-value material transfer, or automated production, Molch-Systeme are becoming an increasingly popular solution.

How does a Pigging System work?

A specially designed elastic pig is inserted into the pipeline. Driven by compressed air, nitrogen, or other pushing media, the pig travels through the pipeline and pushes remaining product to the receiving point.

This process enables:

• Product recovery
• Pipeline cleaning
• Faster product changeover

Compared with traditional flushing methods, Pigging Systems provide significant advantages:

• Maximize recovery of valuable products and reduce material waste
• Significantly shorten changeover time and improve production efficiency
• Reduce consumption of solvents, water, and cleaning agents
• Lower wastewater generation and environmental treatment costs
• Minimize cross-contamination between different products
• Support automation integration with PLC, MES, and DCS systems

For high-viscosity products such as lubricants, paints & coatings, resins, adhesives, and battery slurry materials, Molch-Systeme can deliver significant economic benefits.

How to Choose the Right Pipeline Residue Removal Solution?

Companies should consider the following factors:

• Product value
• Frequency of product changeovers
• Pipeline length and complexity
• Material viscosity
• Automation requirements
• Need to reduce cleaning costs and wastewater emissions

A Pigging System is especially suitable when:

• Multiple product changeovers are required every day
• Pipeline residues cause significant material losses
• Cleaning processes occupy excessive production time
• Waste treatment costs continue to increase

In these situations, a Molchsystem can provide a higher return on investment (ROI).

BJVP: Professional Pigging System Manufacturer

Founded in 1996, BJVP specializes in the development, engineering, manufacturing, and integration of Pigging Systems, automated fluid transfer systems, and product recovery solutions.

With nearly 30 years of industry experience, BJVP provides customized solutions based on customers’ product characteristics, pipeline layouts, and production requirements.

BJVP helps customers:

• Increase product recovery rates
• Reduce material losses
• Shorten product changeover time
• Reduce cleaning fluid consumption and wastewater discharge
• Improve production automation
• Lower overall operating costs

BJVP Pigging Systems are widely used in industries including petrochemicals, lubricants, paints & coatings, food & beverage, and new energy materials.

Schlussfolgerung

Removing pipeline residue is not only related to product recovery efficiency, but also directly affects production efficiency, operating costs, and product quality.

Compared with traditional purging and flushing methods, Molch-Systeme enable efficient product recovery while reducing cleaning time, wastewater generation, and production losses.

For modern fluid manufacturing companies seeking cost reduction, higher efficiency, and sustainable production, Pigging Technology has become an important solution for improving production competitiveness.