Anti-corrosion SSAW steel pipes for water supply and drainage

The anti-corrosion SSAW steel pipe for water supply and drainage features a layer of polyethylene (PE) resin, ethylene-acrylic acid copolymer (EAA), epoxy (EP) powder, or non-toxic polypropylene (PP) applied to the inner wall of the steel pipe. This protective layer, with a thickness of 0.5 to 1.0 mm, is melted onto the steel surface, creating a steel-plastic composite pipe. The coating may also include other organic materials, such as non-toxic polyvinyl chloride (PVC). These plastic-coated steel pipes combine the strength and easy connection of steel with the corrosion resistance, non-toxicity, and ability to resist scaling associated with plastic. They overcome common issues with steel pipes, such as corrosion and pollution, as well as the weakness and fire hazard of plastic pipes. The design life of these pipes can reach up to 50 years.

One of the key disadvantages of anti-corrosion SSAW steel pipes for water supply and drainage is that they must not be bent during installation. During thermal processing, electric welding, and cutting, the cut edges should be treated with non-toxic room-temperature curing glue supplied by the manufacturer. The common specifications for these pipes range from Φ15 to Φ300. The main models of anti-corrosion SSAW steel pipes for water supply and drainage include: GS--X-SP-T-EP, GS--SP-T-EP, and GS--D-SP-T-EP (PE).

Plastic-coated steel pipes, also referred to as plastic-coated pipes, steel-plastic composite pipes, or plastic-coated composite steel pipes, are made by fusing a plastic anti-corrosion layer to the inner surface of the steel pipe using techniques such as spraying, rolling, dipping, or suction. These pipes may also feature plastic coatings on both the inner and outer surfaces. Anti-corrosion SSAW steel pipes for water supply and drainage have excellent corrosion resistance and relatively low friction resistance. Epoxy resin-coated steel pipes are ideal for transporting water, seawater, warm water, oil, gas, and other media.

Union Steel Industry Co., Ltd is professional SSAW steel pipes manufacturer, for more details, please contact:sales@union-steels.com

Cutting Method of Anti-Corrosion SSAW Steel Pipe for Water Supply and Drainage:

- Pipe Cutting:

Metal saws should be used for cutting smaller pipes, while sawing machines are more appropriate for large-diameter pipes. When using coil cutting, the rotation speed should not exceed 800 r/min. The cut pipe section should be perpendicular to the axis of the pipe.

- Preparation Before Pipe Connection:

Smooth Metal Burrs: Use a fine file to smooth out any metal burrs at the pipe’s cut edge.

Chamfering: A special reamer should be used to chamfer 1/2 of the thickness of the plastic coating on the pipe, with the chamfering slope at 10°-15°.

Coating Integrity: If the plastic coating at the cut edge is intact, it should be chamfered with a sharpener. If the coating is damaged, use repair fluid to restore it until the coating is crack-free.

Groove Repair: When rolling the groove, the plastic coating on the protruding part may be damaged. This needs to be repaired until the surface is smooth and free from cracks or damage.

Cleaning: Clean the pipe ends and interior using cotton waste and brushes to remove any oil, water, or metal debris from cutting.

By adhering to proper procedures for cutting, repairing, and installing these anti-corrosion SSAW steel pipes, their lifespan and performance in water supply and drainage systems can be significantly extended.