Description
The Dewatering Pig is a tool used for the cleaning and maintenance of oil and gas pipelines, primarily for removing water and other liquids from the pipelines. It plays a crucial role in pipeline maintenance, especially in the drying and cleaning processes.
Main Functions of Dewatering Pig
- Moisture Removal: Used to discharge water from the pipeline, ensuring it is dry to prevent corrosion and bacterial growth.
- Impurity Cleaning: Capable of removing mud, debris, and other solid impurities within the pipeline to maintain unobstructed flow.
- Corrosion Reduction: By removing moisture, it lowers the risk of pipeline corrosion, extending its lifespan.
Features
- Material: Typically made from polyurethane foam, which provides good water absorption and elasticity.
- Design: Features spiral patterns or grooves on the surface to enhance cleaning effectiveness and ensure close contact with the pipe walls.
- Variety in Size: Available in various sizes to match the inner diameter of the pipeline, ensuring a tight fit.
- Ease of Operation: Moves through the pipeline driven by pressure, requiring no additional power.

Application Scenarios
- New Pipelines: Used for drying newly laid pipelines to ensure they are free of moisture.
- Maintenance: Regularly cleans pipelines to prevent the accumulation of impurities and moisture.
- Post-Repair Treatment: Used for cleaning and drying pipelines after repairs.
Advantages of Dewatering Pig
- Efficient Cleaning: Effectively removes moisture and impurities, enhancing pipeline operational efficiency.
- Economical and Practical: Low cost, reusable, and low maintenance expenses.
- Safe and Environmentally Friendly: Does not require chemical agents, reducing environmental pollution.
Polyurethane Test Report
| Polyurethane Test Report |
| NO. | TEST PROJECT | UNIT | TEST REPORT | TEST METHOD |
| 1 | Shore hardness | Shore A | 83 | GB/T 531.1-2008 |
| 2 | DIN abrasion | mm3 | 21 | GB/T 53516-1987 |
| 3 | Akron abrasion | cm3 | 0.0518 | GB/T 1689-1998 |
| 4 | 100% stress at definite elongation | MPa | 3.41 | GB/T 528-2009 |
| 5 | 300% stress at definite elongation | MPa | 5.74 | GB/T 528-2009 |
| 6 | Tensile strength | MPa | 51.2 | GB/T 528-2009 |
| 7 | Elongation at break | % | 1263 | GB/T 528-2009 |
| 8 | Tear strength(right angle) | kN/m | 77 | GB/T 529-2008 |
| 9 | Resilience rate | % | 34 | GB/T 1681-2009 |

Parameters of EMT Dewatering Pig
| Name | Model | Performance | Technical Parameters |
| Bare Foam Pig | LCQZ-RTN | 1. Soft texture and good flexibility. | Starting pressure: 0.02 MPa |
| 2. With strong water absorption, the deformation amount can reach 60%. | Density: 35 kg/m³~220 kg/m³ |
| 3. Used for dewatering, cleaning, and drying pipelines. | Withstand pressure: 7 MPa |
| Stretch rate: 320% |
| Compression ratio: 60 |
| Flex life: 50,000 times |
| Attrition rate: 4 mm/100 km |
| Operating distance: 50 km~150 km |
| Operating temperature: -30℃~100℃ |
| Name | Model | Performance | Technical Parameters |
| Crisscross Foam Pig | LCQZ-RTCC | 1. The interior is foamed by polyurethane material. And the surface is covered with a prismatic block polyurethane elastomer. | Starting pressure: 0.02 MPa |
| 2. High surface hardness and large friction coefficient. | Density: 35 kg/m³~220 kg/m³ |
| 3. Has high elasticity and toughness. | Withstand pressure: 7 MPa |
| 4. Used for pipeline cleaning, cleaning, and cleaning impurities. | Stretch rate: 320% |
| | | Compression ratio: 50 |
| | | Flex life: 50,000 times |
| | | Attrition rate: 2 mm/100 km |
| | | Operating distance: 100 km~300 km |
Conclusion
The Dewatering Pig is an important tool in pipeline maintenance, effectively removing moisture and impurities to ensure the safe operation and extended lifespan of pipelines. Its efficiency, cost-effectiveness, and eco-friendly characteristics make it widely used in the oil and gas industry.
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