National standard plastic-coated straight seam steel pipe for fire protection

Plastic-coated straight seam steel pipes produced according to national standards are essential components in modern fire protection systems. Featuring excellent corrosion resistance, high pressure tolerance, and long service life, these pipes are widely utilized in fire water supply networks, sprinkler systems, and other related applications.

Continental Steel Co., Ltd is professional carbon steel welded pipes manufacturer, for more details, please contact:sales@cscsteel-manufacturing.com

Key Features of National Standard Plastic-Coated Straight Seam Steel Pipe For Fire Protection

Excellent Corrosion Resistance
Both internal and external surfaces of the steel pipe are uniformly coated with anti-corrosive plastic layers (e.g., epoxy resin or polyethylene), effectively preventing rust and prolonging service life.

High Pressure Resistance
With superior mechanical strength, the straight seam welded steel structure ensures safe and reliable operation under high-pressure conditions typical of fire protection systems.

Outstanding Wear Resistance
The plastic coating acts as a protective barrier, reducing internal friction and erosion caused by water flow, which is particularly beneficial for continuous-use environments.

Smooth Internal Surface
The inner coating provides a smooth wall surface, minimizing flow resistance and enhancing fluid delivery efficiency throughout the pipeline.

Ease of Installation
Lightweight and adaptable to multiple connection methods (threaded, flanged, grooved, etc.), these pipes simplify on-site assembly and maintenance.

Application Scenarios of National Standard Plastic-Coated Straight Seam Steel Pipe For Fire Protection

Fire water supply pipelines

Automatic sprinkler systems

Fire extinguishing gas transmission lines

Other environments requiring corrosion and pressure resistance

Compliance Standards of National Standard Plastic-Coated Straight Seam Steel Pipe For Fire Protection

The design, production, and application of fire-protection-grade plastic-coated steel pipes must adhere to the following national standards:

GB/T 5135.20-2010: Coated steel pipes for automatic sprinkler systems

GB/T 17219-1998: Hygienic safety standards for drinking water distribution and protective materials

GB/T 3091-2015: Welded steel pipes for low-pressure fluid transport

CJ/T 120-2016: Plastic-coated composite steel pipes for water supply

Production Process of National Standard Plastic-Coated Straight Seam Steel Pipe For Fire Protection

Steel Pipe Fabrication
Using high-quality carbon steel, straight seam welding is employed to form the base pipe.

Surface Preparation
Rust and contaminants are removed through sandblasting or acid pickling to ensure optimal coating adhesion.

Plastic Coating
Electrostatic spraying or hot-dipping techniques are used to apply uniform plastic layers to both inner and outer walls.

Curing Process
The coated pipe is heat-cured to solidify the plastic layer and ensure strong adhesion.

Quality Inspection
Comprehensive testing—including visual checks, thickness measurements, adhesion strength, and pressure resistance—is conducted to confirm compliance with technical standards.

Usage and Maintenance Guidelines of National Standard Plastic-Coated Straight Seam Steel Pipe For Fire Protection

Handling & Storage
Avoid impact, scratching, or prolonged exposure to sunlight to prevent damage to the plastic coating.

Installation Precautions
Follow standardized installation procedures to maintain the integrity of the coating and ensure proper system sealing.

Routine Maintenance
Conduct periodic inspections and promptly repair any damaged areas to maintain long-term functionality and safety.

Conclusion

National-standard plastic-coated straight seam steel pipes offer robust performance and versatile application in fire safety systems. Selecting certified products and ensuring proper installation and maintenance are key to building a durable and efficient fire protection infrastructure.