Epoxy Coal Tar Anti-Corrosion Steel Pipe

Meanwhile, its mechanical adaptability is also excellent. The coating has good toughness and strong adhesion, making it less prone to large-area scratches and peeling during pipeline hoisting, transportation, and backfilling. This results in a higher construction tolerance rate and significantly reduces on-site rework costs and construction losses. Under compliant construction conditions, the buried pipeline's service life can stably reach over 20 years, with extremely low costs for subsequent operation, maintenance, and replacement, making its overall long-term cost-effectiveness outstanding.

In terms of application scenarios, it is highly targeted, basically covering all industrial and municipal non-clean water transportation projects. In the municipal field, it is mainly used for urban sewage pipe networks, rainwater drainage pipes, and renovation of old pipe networks; in industrial scenarios, it is suitable for wastewater transportation in chemical industrial parks, factory circulating water pipelines, and corrosive fluid transportation pipelines; it is also widely used in various heavily corrosive environment engineering projects such as docks, dams, port-adjacent buried pipelines, low-end water transmission pipelines in oil fields, and tunnel pre-buried anti-corrosion pipelines.

From the coating structure perspective, the IPN8710 anti-corrosion system typically consists of a primer and a topcoat working together. The base layer is composed of polyurethane polyethylene and modified epoxy resin, which forms an interpenetrating network after room temperature curing. The coating structure is extremely dense, exhibiting excellent chemical inertness to corrosive media such as acids, alkalis, and salts, and strong adhesion. It is specifically designed for use as a priming layer for corrosion protection of the inner walls of water supply pipelines. The topcoat layer is modified with epoxy and rubber resin, possessing not only excellent chemical resistance but also resistance to microbial erosion, ensuring that drinking water is not affected by bacterial and algal growth during long-term transportation. This high-solids, low-viscosity coating maintains stable physical and mechanical properties within a wide temperature range of -20℃ to 120℃, exhibiting excellent characteristics such as high strength, high toughness, abrasion resistance, and water immersion resistance.

Drinking water corrosion protection projects allow for no compromises. We implement an extremely stringent quality control system when producing IPN8710 anti-corrosion steel pipes. Before coating, the inner wall of the steel pipe must undergo sandblasting to remove rust, with a surface cleanliness strictly meeting Sa2.5 grade and a roughness controlled to approximately 30μm, to ensure the strongest adhesion between the anti-corrosion coating and the steel pipe substrate. Subsequently, the coating must be prepared according to strict proportions and thoroughly stirred and matured. High-pressure airless spraying or professional brushing techniques are then employed to ensure a tight bond between the primer and topcoat layers. Before leaving the factory, in addition to routine visual inspection, coating thickness testing, and spark plug leak detection, the product must also provide a drinking water safety indicator test report issued by a third-party authoritative institution to ensure that the coating is completely non-toxic, odorless, and will not cause secondary pollution to water quality.