This product innovatively achieves an engineering value of “1+1 > 2”: the outer carbon steel provides exceptional structural strength, high-pressure rating, and external impact resistance, while the inner stainless steel liner offers superior corrosion resistance, high-temperature tolerance, abrasion resistance, and ensures fluid purity. It is an advanced piping solution that optimally balances corrosion resistance, mechanical strength, and total project cost, particularly suited for applications where solid stainless steel pipe is prohibitively expensive, and carbon steel or plastic-lined pipes cannot meet the demanding service conditions.

Exceptional Economy

Under the same corrosive conditions, the cost is significantly lower than that of pure stainless steel pipes or high-grade alloy pipes of the same specifications, especially in large-diameter, high-pressure pipeline projects.

Unparalleled Strength and Pressure Bearing Capacity

The outer carbon steel pipe can be selected with different wall thicknesses and grades (such as API 5L X series), providing a comprehensive solution from low pressure to ultra-high pressure. Its mechanical strength is far superior to pure plastic-lined pipes and thin-walled stainless steel pipes.

Top-Tier Corrosion and Temperature Resistance

The inner stainless steel lining (such as 316L, 2205) can specifically resist corrosion from various acids, alkalis, salts, chlorides, and high-temperature media. Its operating temperature range far exceeds that of all plastic linings (up to -196°C ~ +450°C).

Excellent Thermal Shock Resistance and Safety

The metal-to-metal bonding allows it to withstand drastic temperature changes and thermal cycling, eliminating the risks of aging, brittleness, or thermal deformation associated with plastic linings, resulting in higher system safety.

Long lifespan and low maintenance costs:

Designed for a lifespan of over 30 years, with extremely low maintenance costs, resulting in a significant overall cost advantage throughout its lifecycle.

Ensuring fluid purity

The highly polished stainless steel inner wall (Ra ≤ 0.8μm) is smooth and dense, preventing media contamination and making it suitable for high-purity fluids.

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