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Lingxi Biotechnology Co., LTD

Tianjin Dayou Pipe Industry: leading maker of double-layer rolled welded pipes (Φ3.17–15.88mm), serving automotive and refrigeration pipelines.

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Who Are We？

Tianjin Dayou Pipe Industry Co., Ltd. produces double-layer rolled welded (Bondi) pipes with specifications from Φ3.17mm to Φ15.88mm and wall thicknesses of 0.5–1.0mm. Our products suit automotive oil pipes, brake pipes, and refrigeration pipelines, offering smooth, galvanized, passivated, PVF, and nylon-coated surfaces. Fatigue-, tensile-, and corrosion-resistant, they cost far less than copper pipes.
Tianjin Dayou Pipe Industry Co., Ltd. specializes in double-layer rolled welded (Bondi) pipes with one of the most complete domestic specification ranges, Φ3.17–15.88mm and wall thickness 0.5–1.0mm. Our products suit automotive oil pipes, brake pipes, and refrigeration pipelines, with surface options including smooth, galvanized, passivated, PVF, and nylon coating. Fatigue-, tensile-, and corrosion-resistant, our pipes cost far less than copper and serve as an economical alternative across pipeline applications.

Our Strength

Precision Bondi Tubes
Dayou Pipes
Dayou Precision
Dayou Pipe: Precision Advantage
Most complete Bondi pipe specs Φ3.17–15.88mm; fatigue/corrosion-resistant, far cheaper than copper.
Leading maker of Bondi pipes Φ3.17-15.88mm, full specs, fatigue/corrosion-resistant, cost-effective copper alternative.
Tianjin Dayou: most complete Bondi pipe specs Φ3.17–15.88mm, fatigue/corrosion-resistant, cost far below copper.
Most complete specs Φ3.17–15.88mm, fatigue/corrosion-resistant Bondi pipes—cost-effective copper alternatives for auto & refrigeration.

Bondi Pipes

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Leading maker of double-layer rolled welded pipes for auto & refrigeration lines.

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Tianjin Dayou Pipe Industry: double-layer rolled welded pipes Φ3.17–15.88mm for automotive oil, brake and refrigeration lines.

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Leading maker of double-layer rolled welded (Bondi) pipes, Φ3.17–15.88mm, for auto oil, brake and refrigeration lines.

Meeting Rooms

Leading maker of double-layer rolled welded pipes for auto oil, brake, and refrigeration lines.

Core Advantages

Our company is built on a deep reverence for nature and a commitment to creating products

Our company is built on a deep

Our company is built on a deep reverence for nature and a commitment to creating products that are not only good for the body but also

Energy Technology Research

Utilizing renewable energy and energy-saving techniques in cosmetics production reduces environmental impact, aligning with sustainable development requirements.

Professional Certification

Certified by authoritative organizations to ensure product quality and safety, meeting consumer demand for high-quality cosmetics.

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