Carbon Steel Seamless Pipes, Used in Oil or

Hot Expanded Seamless Steel Pipe – Premium Carbon Steel Tubing for Industrial and Energy Projects Worldwide

Engineered for performance, durability, and adaptability, hot expanded seamless Steel Pipe represents a breakthrough in carbon steel tubing technology. This advanced manufacturing process begins with a solid billet that is rotary pierced or pressure perforated to form a hollow preform, which is then subjected to precise thermal expansion. Unlike conventional rolling methods, this technique enhances dimensional accuracy while achieving controlled wall thickness reduction—without sacrificing structural integrity. The result is a high-strength, homogeneous tube ideal for demanding applications across global infrastructure, energy, and industrial sectors.

Key Features:

• Seamless design ensures uniform mechanical properties and superior pressure resistance compared to welded alternatives
• Customizable wall thickness from 4mm to 40mm, enabling tailored solutions for specific engineering needs
• Diameter range spans DN6" to DN36" (1/2" to 48"), supporting both standard and non-standard project requirements
• Compliant with international standards such as ASTM A53, API 5L, EN 10217, DIN 2448, GB/T 8163, and BS 1387
• Multiple surface treatments including black paint, anti-rust oil, hot galvanized, cold galvanized, and 3PE coating for enhanced corrosion protection
• High production capacity of up to 30,000 metric tons per month supports large-scale procurement demands
• Lengths available from 2 meters to 12 meters, offering flexibility for diverse installation scenarios

The thermal expansion method not only improves material efficiency but also enables the fabrication of specialized configurations that are challenging to produce using traditional techniques. By applying controlled heat treatment followed by mechanical expansion, manufacturers achieve consistent wall uniformity, reduced internal stress, and improved microstructural homogeneity. These characteristics translate into reliable long-term performance under high-pressure conditions and varying environmental exposures—from coastal marine environments to arid desert regions.

This premium-grade carbon steel tubing is widely used in low-to-medium pressure fluid conveyance systems, including natural gas transmission pipelines, steam distribution networks, and structural supports in heavy construction. Industries such as oil & gas, power generation, chemical processing, and municipal utilities rely on these pipes for their robustness, ease of installation, and compliance with global codes. Whether deployed in offshore platforms, onshore refineries, or urban utility tunnels, hot expanded seamless steel pipes deliver exceptional value through optimized cost-efficiency and extended service life.

Global clients consistently report satisfaction with the product’s reliability, consistent quality, and ability to meet unique project specifications. Engineers appreciate the precision in wall thickness control and the wide selection of finish options, which streamline procurement and reduce maintenance costs over time. With corrosion-resistant coatings like 3PE and hot galvanizing, these tubes maintain integrity even in aggressive environments—making them a preferred choice for critical infrastructure projects worldwide.

Frequently Asked Questions:

1. How does hot expanded seamless steel pipe differ from welded tubing? Answer: It offers superior tensile strength, no weld seams, and better resistance to internal pressure due to its fully homogeneous microstructure, making it more suitable for high-integrity applications.
2. Can I request custom wall thicknesses beyond the standard 4–40mm range? Answer: Yes, many producers can accommodate special orders within this range based on technical feasibility and production capacity.
3. Is this pipe suitable for offshore installations? Answer: Absolutely—with appropriate surface treatments like 3PE coating or hot galvanizing, it meets offshore pipeline standards for corrosion resistance and longevity.
4. What is the typical lead time after placing an order? Answer: Orders typically ship within 20 days from receipt of deposit or irrevocable letter of credit at sight.
5. Are certifications available for compliance with international codes? Answer: Yes, products are certified to major global standards including ASTM A53, API 5L, EN 10217, DIN 2448, and others relevant to industrial and energy sectors.

Product Categories : Steel Pipe > Seamless Steel Pipe