Drainage spiral welded pipe

Drainage spiral welded pipe are pipes made from hot-rolled steel strips through a spiral forming process. Their unique feature lies in the spiral curling of the steel strip during forming, resulting in a spiral-shaped weld seam. This structure not only enhances the pipe's circumferential strength but also gives it excellent resistance to deformation. Compared to straight-seam welded pipes, spiral welded pipes have a longer weld seam, but through automated welding processes and rigorous non-destructive testing, the weld quality is more stable and can withstand higher internal pressure and stress from geological subsidence. Tianjin Xinlida's intelligent production equipment has increased the automation rate to over 90%, with full digital monitoring from steel strip uncoiling to finished product output, ensuring that key parameters such as wall thickness uniformity and ovality of each spiral welded drainage pipe exceed industry standards.

Tianjin Xinlida has developed a variety of specifications of  drainage spiral welded pipe for different application scenarios. Standard products range in diameter from 219mm to 3020mm and wall thickness from 4mm to 25mm, meeting the needs of urban rainwater and sewage separation, farmland irrigation, and industrial wastewater treatment. For coastal or chemically corrosive environments, the company's anti-corrosion spiral welded pipes utilize a three-layer PE coating or epoxy powder coating process, verified by salt spray testing, achieving an anti-corrosion life of over 30 years. High-strength spiral welded pipes, through micro-alloying design and heat treatment processes, achieve a yield strength exceeding 600MPa, suitable for deep-buried drainage projects in geologically complex areas. Currently, these products are widely used in overseas projects such as urban pipe network renovation in Southeast Asia and industrial park construction in the Middle East, withstanding extreme environmental tests such as high temperature and humidity, and sandstorm erosion.

Tianjin Xinlida's global footprint provides dual assurance for the delivery of its drainage spiral welded pipes. Its domestic production base boasts an annual capacity of 50 million tons, equipped with imported German spiral forming machines and American Lincoln welding machines, enabling rapid response to large-volume orders. Overseas bases, through localized warehousing and technical service teams, shorten delivery cycles to regions such as the Middle East and Southeast Asia. More importantly, the company's flexible production system allows customers to adjust specifications or quantities after contract signing but before production scheduling. The production department uses a digital scheduling system to re-plan process routes, keeping losses due to changes to within 3%.

From urban underground pipe networks to transnational water conservancy projects, Tianjin Xinlida's drainage spiral welded pipe are becoming the choice of global infrastructure builders due to their reliable quality and flexible service. The company's import and export qualifications and certification system covering 50 countries ensure that every pipe seamlessly meets international standards, injecting lasting power into global drainage systems.