Project Overview

Industry: Chemical Manufacturing

Application: Chemical Process Pipeline System

Products Supplied: Steel-Nylon Composite Pipes and Matching Fittings

Commissioning Year: 2022

Operating Status: More than 3 Years of Continuous Service

In 2022, Jiangsu Debang Xinghua Chemical Technology Co., Ltd. upgraded part of its chemical process pipeline system by installing steel-nylon composite pipes and matching fittings manufactured by Guangdong Kejin New Materials Co., Ltd.

The project was designed to improve the long-term reliability of process pipelines handling corrosive chemical media. Since commissioning, the pipeline system has operated continuously for more than three years without any reported major pipeline failures. In March 2025, the customer issued a formal letter confirming its satisfaction with both the product performance and after-sales technical support.

Project Background

Chemical process pipelines operate under demanding conditions where corrosion, erosion, pressure fluctuations, and continuous operation place high requirements on pipeline materials.

Before the upgrade, the plant faced several common challenges associated with conventional pipeline materials.

Corrosive Chemical Media

Process fluids exhibit strong chemical corrosion and erosive characteristics, requiring pipeline materials with long-term corrosion resistance and structural stability.

Reliability Requirements

Unexpected pipeline failures may result in production interruptions, maintenance costs, and safety risks. Improving operational reliability was one of the project's primary objectives.

Long-Term Maintenance Considerations

The plant required a pipeline solution capable of reducing maintenance frequency while providing consistent performance throughout its service life.

Supplier Capability

Besides product quality, the customer required stable product supply, technical assistance, and responsive after-sales service to support future plant operation and expansion.

Solution

To address these requirements, Guangdong Kejin supplied a complete pipeline solution consisting of steel-nylon composite pipes and compatible fittings.

Steel-Nylon Composite Structure

The pipeline combines:

• Carbon steel outer pipe for mechanical strength and pressure resistance

• Reinforced nylon inner lining for corrosion and abrasion resistance

This composite design allows the pipeline to withstand demanding chemical service conditions while maintaining structural integrity.

Complete System Supply

Pipes and matching fittings were supplied as a complete system, helping ensure installation compatibility, sealing reliability, and long-term operational stability.

Long-Term Technical Support

The project also included ongoing technical consultation and after-sales service throughout operation.

Technical Advantages

Excellent Corrosion Resistance

The reinforced nylon lining provides effective protection against many corrosive chemical media, reducing the risk of internal corrosion and extending service life.

High Mechanical Strength

The steel outer layer provides the pressure-bearing capacity required for chemical process pipelines while protecting the internal lining.

Stable Long-Term Operation

After more than three years of continuous service, the pipeline system has maintained stable operating performance without reported major pipeline failures.

System Compatibility

Dedicated fittings are designed to match the pipeline system, simplifying installation and helping maintain sealing performance throughout operation.

Responsive Technical Service

Continuous technical support and after-sales service help ensure efficient operation and timely response when required.

Project Implementation

Project Results

Following commissioning, the upgraded pipeline system has demonstrated stable performance under normal production conditions.

Key outcomes include:

• Continuous operation for over three years

• No reported major pipeline failures

• Stable corrosion resistance during service

• Reliable structural performance

• Reduced maintenance requirements

• Positive customer feedback regarding technical support

Customer Benefits

The project delivered several operational benefits to the chemical plant:

• Improved reliability of chemical process pipelines

• Reduced risk of corrosion-related leakage

• Lower maintenance frequency and associated downtime

• Enhanced production continuity

• Long-term supplier partnership for future pipeline projects

Technical Highlights

• Steel-reinforced composite structure for pressure resistance

• Reinforced nylon lining for corrosion and wear protection

• Complete pipe and fitting system

• Proven industrial application with more than three years of operation

• Ongoing technical and after-sales support

• Customer recognition documented in 2025

Conclusion

The Jiangsu Debang Xinghua Chemical project demonstrates the practical application of steel-nylon composite pipes in chemical process pipeline systems.

With more than three years of continuous operation, the project confirms that combining a steel structural layer with a reinforced nylon lining can provide a reliable solution for chemical plants requiring corrosion resistance, mechanical strength, and long-term operational stability.

Appendix

1. On-site pictures