Product Overview

Epoxy Coal Tar Coated Spiral Submerged Arc Welded (SSAW) Steel Pipe is a high-strength anti-corrosion pipe customized for municipal sewage, industrial wastewater and chemical sewage transportation projects. Made of high-quality carbon steel strip and integrally formed by advanced spiral submerged arc welding technology, the pipe features uniform wall structure and stable pressure resistance. The outer wall is coated with high-strength epoxy coal tar anti-corrosion coating with multi-layer curing molding. It is perfectly suitable for complex sewage pipe network working conditions such as buried installation, humid environment, acid-base corrosion and microbial erosion, serving as the preferred pipe material for sewage treatment, sewage pipe network renovation and industrial park sewage transportation.

Core Technology & Craft

Manufactured in strict accordance with national standards, the product adopts high-quality Q235B/Q355B steel as the base material, and is processed through six core procedures: automatic spiral pipe rolling, precise submerged arc welding, weld non-destructive testing, surface sandblasting rust removal, multi-layer epoxy coal tar coating spraying and high-temperature curing. The pipe weld is flat and dense without pores or cracks. Matched with a high-strength epoxy coal tar protective layer, the coating features strong adhesion and high compactness, which can effectively isolate the erosion of acid-base media, chloride ions and microorganisms in sewage and soil on the steel pipe matrix, and fundamentally solve the problems of rusting, leakage, damage and aging of buried sewage pipes.

Core Advantages

Excellent Anti-corrosion & Rust Resistance

The epoxy coal tar coating has excellent resistance to acid, alkali, salt spray and microbial corrosion, adapting to a wide pH range of 2-12. With strong resistance to chloride ion penetration, it can long-term resist the corrosion of organic matter, corrosive ions in sewage and humid soil, completely avoiding pipe rust perforation and leakage, and adapting to various harsh sewage transportation scenarios.

Superior Mechanical & Pressure Resistance

The spiral submerged arc welding forming process endows the pipe with high overall structural strength, good toughness, outstanding impact resistance, bending resistance and soil extrusion resistance. It features accurate pipe diameter tolerance with a maximum pressure resistance of 6.4MPa. The pipe is not easy to deform and the coating is not easy to fall off during transportation, hoisting and buried backfilling, with stable operation in long-term underground conditions and strong foundation settlement resistance.

Long Service Life & Cost-Effective

Compared with ordinary anti-corrosion steel pipes, this product has more stable anti-corrosion layer, excellent aging resistance and water penetration resistance, with a service life of more than 30 years under buried sewage working conditions. One-time laying construction avoids frequent long-term maintenance, greatly reducing the operation, maintenance and replacement cost of the pipe network, with far higher comprehensive cost performance than ordinary pipes.

Easy Installation & Wide Adaptability

With complete specifications and customizable caliber, wall thickness and anti-corrosion grade, the pipe has flat and regular pipe ends for convenient and efficient butt welding and flange connection. It adapts to various construction methods such as direct buried laying, pipe trench laying and underwater laying, meeting the sewage pipe network construction needs of municipal, industrial, chemical and park scenarios.

Application Scope

Widely used in municipal urban sewage pipe network projects, industrial wastewater transportation in industrial parks, corrosive sewage discharge of chemical enterprises, inlet and outlet pipelines of sewage treatment plants, township sewage renovation projects, river sewage treatment, and transportation of underground humid and corrosive media, as well as various water supply, drainage and sewage engineering projects.

Product Parameters

Base Material: Q235B Carbon Structural Steel

Forming Technology: Spiral Submerged Arc Welding (SSAW)

Anti-corrosion Coating: Epoxy Coal Tar Coating (Standard / Reinforced / Special Reinforced Grade Optional)

Coating Thickness: Customizable

Applicable Media: Municipal Sewage, Industrial Wastewater, Chemical Corrosive Sewage

Working Pressure: ≤6.4MPa

Service Life: ≥30 Years (Standard Buried Working Condition)

Testing Standard: X-ray / Ultrasonic Weld Inspection, Hydrostatic Test for Each Pipe

Conclusion

With stable welding quality, excellent anti-corrosion and rust resistance, ultra-long service life and high adaptability, epoxy coal tar coated SSAW spiral steel pipe has become an essential anti-corrosion pipe for sewage transportation engineering. We strictly control the quality from raw material selection, production and processing to finished product inspection to eliminate potential quality hazards, providing safe, durable and economical pipeline solutions for various sewage pipe network projects, which is a reliable choice for municipal engineering and industrial infrastructure construction.