carbon Seamless Steel Pipe thick wall big

Hot Expanded Seamless Steel Pipe – High-Quality Carbon Steel Tubing for Industrial Applications

Hot expanded seamless Steel Pipe is a specialized type of carbon steel tubing manufactured using a thermal expansion process that increases diameter while reducing wall thickness. This advanced technique allows producers to create non-standard and custom-sized thin-walled seamless pipes efficiently and cost-effectively—making it ideal for industries requiring large-diameter, low-density steel solutions where traditional rolling methods fall short. Widely adopted in global manufacturing, this method represents a significant evolution in tube production technology, offering enhanced flexibility, precision, and scalability compared to conventional processes.

Key features include consistent dimensional accuracy, superior mechanical properties due to controlled heat treatment, and the ability to produce seamless tubes from billet through rotary piercing or pressure perforation followed by thermal expansion. The resulting product meets international standards such as ASTM, API, EN, DIN, GB, and BS, ensuring compatibility across diverse engineering applications worldwide.

This hot-expanded carbon steel pipe offers an impressive range of outer diameters from 6" to 36" (DN15–DN900), with wall thicknesses between 4mm and 40mm, making it suitable for both high-pressure and low-medium pressure systems. Available in multiple schedules—including SCH10 to SCH160—it supports various industrial needs, from structural frameworks to fluid transport. Standard lengths vary from 2 to 12 meters, depending on customer specifications, and surface finishes can be customized to meet corrosion resistance requirements, including black paint, varnish, anti-rust oil, hot galvanizing, cold galvanizing, or 3PE coating.

Ideal for use in oil and gas pipelines, heating systems, coal gas transmission, construction projects, and general-purpose steel structures, these seamless tubes provide excellent durability under demanding conditions. Their thermal expansion manufacturing process ensures minimal material waste, efficient production rates, and precise control over geometry—critical factors in modern infrastructure development. With a monthly output capacity of up to 30,000 metric tons, suppliers ensure reliable delivery within 20 days after deposit confirmation or letter of credit at sight.

Global users have praised the reliability of hot expanded seamless steel pipes for their consistency in performance, especially when used in large-scale energy and construction sectors. Engineers appreciate the balance between strength, weight reduction, and adaptability to complex geometries—features that are increasingly vital in sustainable design practices.

Common questions often revolve around dimensional tolerances, surface finish options, and compliance with specific international codes like ASME B36.10M or ISO 3183. Manufacturers continuously refine parameters such as temperature control, die design, and post-expansion cooling to enhance uniformity and minimize residual stress—ensuring long-term integrity in critical applications.

Product Categories : Steel Pipe > Seamless Steel Pipe