In the advanced manufacturing of cast polyurethane elastomers, the stability of the casting process and the consistency of material properties directly determine the performance of the final product. This is especially true in pipeline lining applications, where polyurethane must withstand extreme abrasion, continuous chemical exposure, high-pressure flow, and long-term mechanical stress.

Leveraging decades of expertise in polyurethane processing equipment, Feilong Polyurethane Equipment has developed an oil-heated cast elastomer machine tailored specifically for MOCA- and BDO-cured polyurethane systems. Today, this equipment has become a core production tool for many domestic pipeline-lining manufacturers seeking high quality, high consistency, and high efficiency.

1. Pipeline Lining: Extreme Requirements for Polyurethane Elastomers

Pipelines used in mining, chemical processing, power generation, and water conservancy face long-term challenges such as:

• High-velocity solid particle erosion
• Acid/alkali and solvent corrosion
• High-pressure and pulsating flow conditions

Traditional metal or rubber liners often suffer from rapid wear, aging, delamination, or chemical degradation. Cast polyurethane elastomers (CPU), cured with MOCA (3,3'-dichloro-4,4'-diaminodiphenylmethane) or BDO (1,4-butanediol), offer significant advantages:

• Excellent tear and tensile strength
• Outstanding abrasion resistance
• High elasticity and resilience
• Superior chemical and hydrolytic stability

However, these performance advantages can only be fully realized when supported by a highly stable and precisely controlled casting process—the foundation on which Feilong’s oil-heated casting platform is built.

2. Feilong Oil-Heated PU Casting Machine: A Precision Platform Tailored for MOCA/BDO Systems

Feilong’s oil-heated elastomer casting machines are engineered for the specific temperature-sensitive needs of small-molecule chain extenders such as MOCA and BDO. Key features include:

2.1 High-Capacity Oil Bath Heating System (Temperature Fluctuation ≤ ±1°C)

MOCA and BDO require strictly controlled reaction temperatures to ensure predictable viscosity, gel time, and polymer structure. Feilong uses a closed-loop thermal oil circulation system, which offers:

• High thermal capacity
• Uniform heat distribution
• Exceptional thermal stability
• Accurate temperature control across the entire material flow path

All material tanks, feed lines, and the mixing head are kept within the same thermal circuit. This prevents localized overheating, premature curing, or uncontrollable gelation—common issues with resistance heating or water-heated alternatives.

2.2 Fully Enclosed Dual-Component Metering and Mixing (Ratio Error < ±1%)

Pipeline linings demand uniform thickness, zero voids, and high structural density. To achieve this, Feilong utilizes:

• High-precision gear-pump metering modules
• Enclosed static or dynamic mixing heads
• Intelligent closed-loop flow monitoring

This ensures accurate A/B ratio control, stable flow, and homogeneous mixing, enabling consistent mechanical properties across the entire lining.

2.3 Modular Output and Process Adaptability

Feilong equipment can be seamlessly integrated with multiple pipe-lining manufacturing methods:

• Centrifugal casting
• Rotational spray lining
• Molded or cast-in-place lining

With support for pipe diameters from DN50 to DN2000, the system offers flexible output configurations, programmable metering control, and customized interface solutions suited to diverse production environments.

2.4 Fully Compliant with China’s Safety & Environmental Standards

The equipment is designed and manufactured in accordance with:

• GB/T 3766-2015 – Hydraulic System General Technical Requirements
• AQ/T 7009-2013 – Safety Standardization for Machinery Manufacturing

All electrical components meet explosion-proof requirements, while the intelligent control interface supports:

• Real-time monitoring
• Production data logging
• Remote diagnostics

This ensures safe, compliant, and intelligent production operations.

3. Proven Industrial Performance: Validated from Laboratory to Field

According to industry reports and customer feedback:

• In a large mining slurry pipeline, MOCA-cured polyurethane liners produced with Feilong equipment achieved three times the service life of conventional rubber liners.
• In chemical waste-liquid pipelines, BDO-cured polyurethane liners demonstrated excellent resistance to chemical permeation, significantly reducing leakage risks and downtime.

These results highlight Feilong’s deep understanding of polyurethane reaction engineering, combined with continuous optimization in machinery design and temperature control technology.

Conclusion

As industries demand higher durability, lower maintenance costs, and longer service life from pipeline systems, polyurethane elastomer linings are rapidly becoming the ideal solution. Feilong Polyurethane Equipment provides a robust, precise, and compliant oil-heated casting platform that empowers manufacturers to meet these high-value performance expectations.

Looking ahead, Feilong will continue driving innovation across materials, processing technologies, and intelligent equipment—advancing the entire polyurethane elastomer industry toward higher standards.