
Underground Prefabricated Directly Buried Insulated Thermal Insulation Steel Pipe for Hot Water Pipeline. One-Stop Prefabricated Solution: Integrated manufacturing of pipes, fittings, flanges, and brackets in the factory. Strict Quality Inspection: Produced and inspected in strict accordance with ship design standards and 100% X-ray seam testing. Wide Diameter Range: Seamless pipe OD from 2mm to 762mm; Welded products up to DN3000 (120 inches). Diverse Material Options: Available in Austenitic Stainless Steel, Duplex Steel, Nickel Alloy, and Titanium alloys. Comprehensive Flange Ratings: Covers ANSI 150LBS-2500LBS, DIN PN6-PN400, JIS 5K-30K, and HG PN0.25-PN25. Multiple International Standards: Complies with ASTM, GB, DIN, JIS, ASME, and GOST standards. Flexible Customization: Special specifications and lengths up to 38m available as required. Fast Lead Time: Off-season delivery within 15 workdays; peak season within one month.