Anti-corrosion spiral steel pipes for water supply and drainage

Anti-corrosion spiral steel pipes designed for water supply and drainage feature a layer of polyethylene (PE) resin, ethylene-acrylic acid copolymer (EAA), epoxy (EP) powder, and non-toxic polypropylene (PP) or non-toxic polyvinyl chloride (PVC) on the inner wall, with a thickness ranging from 0.5 to 1.0 mm. These plastic-coated steel pipes combine the strength, ease of connection, and resistance to water flow impact of traditional steel pipes with the corrosion resistance, cleanliness, and lack of scaling of plastic pipes. Additionally, they offer better strength and fire resistance compared to purely plastic pipes, with a design life of up to 50 years.

Advantages and Disadvantages

- Advantages:

Strength and Durability: Retain the strength and impact resistance of steel pipes.

Corrosion Resistance: The internal plastic coating prevents corrosion and scaling.

Fire Resistance: Superior to plastic pipes in fire safety.

- Disadvantages:

Installation Restrictions: Cannot be bent during installation.

Special Handling: During thermal processing, welding, and cutting, the cut surface must be coated with non-toxic room temperature curing glue provided by the manufacturer.

Specifications and Models

Specifications:Φ15-Φ300.

Models: GS--X-SP-T-EP, GS--SP-T-EP, GS--D-SP-T-EP (PE).

Types of Plastic-Coated Steel Pipes

Plastic-coated steel pipes, also known as plastic-coated pipes, steel-plastic composite pipes, or plastic-coated composite steel pipes, feature a plastic anti-corrosion layer fused to the inner (and sometimes outer) surfaces of the steel pipe through spraying, rolling, dipping, or suction processes. These pipes exhibit excellent corrosion resistance and low friction, making them suitable for transporting water, seawater, warm water, oil, gas, and other media.

Cutting Method

- Pipe Cutting:

Use metal saws for cutting, and sawing machines for large-diameter pipes.

When using coil cutting, do not exceed a rotation speed of 800 r/min.

Ensure the cut section is perpendicular to the pipe axis.

- Preparation Before Pipe Connection:

Smoothing: Smooth metal burrs at the cut pipe port with a fine file.

Chamfering: Use a special reamer to chamfer 1/2 of the plastic coating thickness with a slope of 10°-15°.

Port Integrity: If the plastic coating at the port is intact, chamfer with a sharpener. If damaged, repair it with repair fluid until crack-free.

Groove Repair: After grooving, repair any damage to the plastic coating until smooth and free of cracks.

Cleaning: Use cotton waste and brushes to remove oil, water, and metal shavings from the pipe end and inside the pipe.

By adhering to these guidelines, you can ensure the effective installation and maintenance of anti-corrosion spiral steel pipes for water supply and drainage.