ASTM API 5L X42-X60 oil and gas carbon seamless steel pipe/20 30 inch seamless steel pipe

High-Quality Hot Expanded Seamless Steel Pipe – Durable Carbon Steel Tubing for Global Industrial Projects

Engineered for performance, precision, and versatility, hot expanded seamless Steel Pipe represents a modern advancement in carbon steel tubing technology. Unlike traditional methods that rely on rolling or welding, this premium-grade solution uses a controlled thermal expansion process to achieve larger diameters with thinner walls while preserving structural integrity. The result is an optimized balance of strength, dimensional accuracy, and cost-effectiveness—ideal for demanding applications across energy, infrastructure, and heavy industry sectors worldwide.

Key features include an outer diameter range from 6 inches to 36 inches (DN15–DN1200), wall thicknesses between 4 mm and 40 mm, and customizable lengths up to 12 meters per piece. This manufacturing technique begins with rotary piercing or pressure perforation followed by precise heat treatment, ensuring uniform wall reduction and consistent sizing without any weld seams. Such attributes make it particularly suitable for projects requiring non-standard dimensions at competitive pricing, especially where weight savings and mechanical resilience are critical.

The production process enhances efficiency significantly—enabling monthly output of up to 30,000 metric tons—and minimizes material waste while reducing lead times. Pipes can be delivered in multiple surface finishes tailored to environmental conditions: black finish, anti-rust oil coating, hot galvanized, cold galvanized, or triple-layer polyethylene (3PE) protection for corrosion resistance. Packaging includes plastic end caps, bundled steel frames, and woven bags to ensure safe handling during transport and long-term storage in varied climates.

These seamless carbon steel pipes are widely used in low-to-medium pressure fluid systems, natural gas transmission lines, steam distribution networks, load-bearing frameworks, and coal gas pipelines. They serve as essential components in oil and gas exploration platforms, power generation facilities, and large-scale civil engineering works globally. Designed to withstand fluctuating temperatures and internal pressures, they provide reliable operation across diverse geographic regions—from arid deserts to coastal environments.

Global clients appreciate the product’s blend of technical compliance, adaptability, and economic value. Many have successfully implemented these pipes in offshore drilling operations, industrial plants, municipal water systems, and transportation infrastructure due to their adherence to international standards such as ASTM A106, API 5L, EN 10217, DIN 2448, GB/T 8163, and BS 1387. Consistent quality and conformity with global codes ensure seamless integration into existing piping networks and regulatory frameworks.

Common inquiries focus on dimensional tolerances, surface treatments, and delivery timelines. Standard deviations are maintained within ±1% for outer diameter and ±5% for wall thickness, guaranteeing compatibility with standard fittings and connectors. Typical delivery lead time is approximately 20 days after payment confirmation or letter of credit acceptance. For specialized needs—such as enhanced corrosion protection, custom lengths, or unique chemical resistance—manufacturers offer bespoke solutions based on client specifications and project requirements.

Product Categories : Steel Pipe > Seamless Steel Pipe