Customized Seamless Steel Pipe 32.2 * 6.2 -

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

The hot expanded seamless Steel Pipe is a premium-grade carbon steel tube produced using advanced thermal expansion technology, offering enhanced dimensional accuracy and cost-effective manufacturing. This process involves heating the billet to high temperatures and then expanding its diameter through controlled mechanical force—typically via skew rolling or drawing methods—to achieve thinner walls while maintaining structural integrity. Unlike traditional cold-drawn pipes, this method allows for rapid production of non-standard, large-diameter thin-walled tubes that are ideal for specialized engineering needs.

Manufactured from high-quality carbon steel billets, these seamless pipes undergo a rigorous thermal expansion process where precise temperature control and mechanical deformation ensure uniform wall thickness and minimal internal stress. The resulting product combines excellent mechanical properties with consistent surface finish, making it suitable for demanding environments in oil and gas, construction, energy, and infrastructure sectors. With an outer diameter range from 6” to 36” (DN15–DN1200) and wall thicknesses between 4mm and 40mm, this tubing offers flexibility for both low- and medium-pressure applications.

Key Features:

• High production efficiency with monthly output up to 30,000 metric tons
• Complies with international standards including ASTM, API, EN, DIN, GB, BS
• Customizable length (2–12 meters) based on client specifications
• Available in various surface treatments such as black paint, anti-rust oil, hot galvanizing, cold galvanizing, or 3PE coating
• Non-standard sizes possible at competitive pricing due to optimized thermal expansion techniques

This type of seamless carbon steel pipe is particularly well-suited for transporting fluids under moderate pressure, including water, steam, coal gas, and natural gas. It’s widely used in heating systems, pipeline networks, structural frameworks, and offshore platforms. The thermal expansion method not only reduces raw material waste but also improves yield rates compared to conventional rolling processes, contributing to sustainable manufacturing practices in global steel industries.

Engineers and procurement specialists appreciate the balance of strength, durability, and adaptability offered by hot-expanded seamless steel tubes. These pipes are especially valuable when standard pipe dimensions do not meet project requirements—such as in bridge supports, chemical processing units, or industrial boilers—where custom solutions are essential without compromising quality or safety.

Customer feedback highlights consistent performance across diverse climates and operational conditions. Users often cite reduced installation time, improved corrosion resistance with proper surface treatment, and reliable pressure handling capabilities as key benefits. While ongoing research continues to refine thermal expansion parameters like temperature gradients and die design, manufacturers are increasingly adopting digital monitoring systems to enhance precision and repeatability in mass production.

Frequently Asked Questions:

What makes hot expanded seamless steel pipe different from cold-drawn tubing? It uses heat to soften the metal before expansion, allowing greater deformation with less risk of cracking and enabling production of larger diameters with thinner walls more efficiently.

Can I get custom sizes outside the standard range? Yes, the thermal expansion process allows for flexible customization of OD and wall thickness beyond typical mill sizes, making it ideal for unique engineering projects.

Is this pipe suitable for outdoor use? With appropriate surface protection—like zinc coating or 3PE—the pipe resists weathering and corrosion effectively, even in harsh environments.

How long does delivery take after order confirmation? Typically 20 days following receipt of deposit or letter of credit at sight, depending on order volume and customization level.

Product Categories : Steel Pipe > Seamless Steel Pipe