API 5L Stainless Steel 304L 3"--24" Seamless

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

The hot expanded seamless Steel Pipe is a precision-engineered carbon steel tube manufactured through advanced thermal expansion technology. This process involves heating and mechanically expanding the diameter of a pre-formed seamless pipe blank, resulting in enhanced dimensional accuracy, improved wall thickness uniformity, and cost-effective production of non-standard or custom-sized tubes. Unlike traditional cold rolling methods, this technique allows for rapid thickening and controlled expansion—ideal for producing large-diameter, thin-walled pipes that are often in high demand across global infrastructure projects.

Key Features:

• Manufactured using mature thermal expansion techniques with precise control over temperature, pressure, and speed parameters.
• Available in OD range from 6" to 36" (DN15–1200), with wall thicknesses between 4mm and 40mm—ideal for both low-pressure and medium-pressure systems.
• Complies with international standards including ASTM, API, EN, DIN, GB, and BS—ensuring compatibility with global engineering specifications.
• High production capacity of up to 30,000 metric tons per month supports timely delivery for large-scale industrial needs.
• Customizable surface finishes such as black painting, anti-rust oil, galvanizing (hot or cold), or 3PE coating for corrosion resistance in harsh environments.

This innovative manufacturing method begins with a billet that undergoes rotary piercing or pressure perforation to form a hollow tube blank. The subsequent thermal expansion process reduces wall thickness while increasing outer diameter—offering superior mechanical properties compared to conventional seamless pipes. It's particularly effective in addressing gaps in the market where standard pipe sizes fail to meet project-specific requirements, especially for oil and gas transmission lines, structural frameworks, and steam distribution systems. The technology enables efficient fabrication of specialized tubing without compromising on strength, consistency, or dimensional stability.

Applications span across multiple sectors including construction, energy, chemical processing, and mechanical engineering. These pipes serve as reliable components in low-to-medium pressure fluid transport systems, coal gas pipelines, heating systems, and structural support elements in heavy-duty applications. Their ability to withstand internal pressure while maintaining lightweight design makes them suitable for offshore platforms, refineries, power plants, and industrial buildings worldwide.

User Feedback:

Customers consistently praise the consistent quality, tight tolerances, and excellent value offered by these hot-expanded seamless carbon steel pipes. Many note the ease of installation and long service life even under fluctuating environmental conditions. Engineers appreciate the flexibility in customization—from size and finish to compliance with regional codes—which simplifies procurement and integration into complex projects.

Common Questions:

Is this pipe suitable for high-pressure applications? While primarily designed for low- to medium-pressure systems, its robust composition and precise manufacturing make it adaptable to moderate pressure scenarios when properly rated per applicable standards like API 5L or ASTM A106.

Can I request custom dimensions outside the standard range? Yes, the thermal expansion process supports tailored solutions for unique project demands, allowing manufacturers to produce non-standard pipe sizes efficiently and economically.

What surface treatments are available? Options include black paint, varnish, rust-inhibiting oil, hot or cold galvanization, and multi-layer 3PE coatings for protection against moisture, chemicals, and abrasion in demanding environments.

Overall, the hot expanded seamless steel pipe represents a modern, scalable solution for industries seeking durable, customizable, and economically viable piping systems. With ongoing advancements in thermal processing controls and material science, this product continues to evolve as a critical component in global infrastructure development.

Product Categories : Steel Pipe > Seamless Steel Pipe