The HDPE double-wall corrugated pipe supplied by this manufacturer adopts a two-color design of outer black and inner yellow. The outer black HDPE material is resistant to ultraviolet rays and aging, and can resist sun and rain in underground or outdoor environments, prolonging the service life of the pipeline; the inner yellow layer is smooth and clean, which can reduce the flow resistance of sewage, rainwater and other conveying media, improve discharge efficiency, and is not easy to attach impurities, and is suitable for a variety of transportation scenarios. In terms of specifications and models, the outer black and inner yellow HDPE double-wall corrugated pipe covers a full range of commonly used diameters from 200mm to 1200mm, and can provide products with matching sizes from small community pipe networks to large municipal projects. The manufacturer supports flexible deployment of specifications according to wholesale orders. Whether it is scattered procurement or bulk stocking, it can meet the installation and adaptation needs of different projects. The product is used in a wide range of scenarios, suitable for municipal rainwater drainage, urban domestic sewage treatment, old pipe network transformation, and conventional wastewater transportation in industrial parks. The outer black weather resistance is suitable for outdoor deep-buried environments, and the inner yellow is easy to identify the direction of pipelines during construction. At present, manufacturers support wholesale, interested purchasers can call the contact information 13339996652 consultation details.