Sihe Steel
Sihe Steel
Explore our high-performance seamless coiled tubing, capillary configurations, and precision polished piping solutions.
In modern heavy industries, Grade 304 Stainless Steel (UNS S30400 / EN 1.4301) represents the gold standard of versatility and value. As an austenitic alloy composition containing 18% chromium and 8% nickel, SS 304 offers outstanding resistance to atmospheric corrosion, organic chemicals, and inorganic solvents. By manufacturing this grade into a seamless pipe configuration, the metallurgical integrity is elevated.
Unlike welded tubes, seamless pipes have no weld seam—a potential location for structural failure, stress corrosion cracking, or local pitting. This makes seamless tubes crucial in ultra-high-pressure applications, extreme cryogenic environments, and sensitive pneumatic delivery systems.
Global supply chain logistics require raw materials to satisfy multiple criteria: cost-efficiency, strict mechanical properties, and absolute reliability. SS 304 seamless pipes fulfill these needs. In terms of mechanical strength, SS 304 offers a tensile strength minimum of 515 MPa and a yield strength minimum of 205 MPa, combined with a high elongation value (typically above 35%). This allows the pipe to undergo substantial bending, flaring, and forming without cracking.
Sihe Steel Group uses specialized oxygen-free hydrogen atmosphere bright annealing technology. Annealing stainless steel in a high-purity hydrogen environment avoids oxidation on the surface. This maintains a clean, mirror-like finish (ideal for high-purity applications) while relieving the mechanical stresses introduced during the cold-drawing process.
The global market for steel products requires reliable supply chains. Liaocheng Sihe Stainless Steel Material LTD is situated in Shandong Province, China, a global hub for steel pipe manufacturing.
Operating six high-precision production lines, our factory uses advanced cold-drawing, cold-rolling, and automated straightening machinery. The advantages of sourcing from our Chinese production center include:
A professional Chinese manufacturer supplying global industries with high-performance seamless coiled tubing, polished tubes, and ultra-long heat exchanger pipes.
Liaocheng Sihe Stainless Steel Material LTD is a specialist in the manufacturing of stainless steel coiled tubing, polishing tubes, and seamless coiled systems. We produce to GB, ASTM, ASME, JIS, and EN standards.
Our core steel grades include: 304/304L, 316L, 321, 317L, 309S, 310S, and INCOLOY 800/825, INCONEL 625, Duplex 2205, and Super Duplex 2507.
Our coiled tubing is available in outer diameters from 0.125 inch (3.175 mm) up to 1 inch (25.4 mm), with wall thicknesses up to 0.165 inch (3 mm). Continuous lengths up to 32,800 feet (10,000 meters) are available without orbital joints, which is crucial for oil and gas control umbilicals.
Sihe Steel Group exports to more than 30 countries, including the United States, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe.
We provide high-precision downstream fabrication to deliver ready-to-install piping assemblies.
We support various materials (e.g., 304, 316L, 2205) and custom specifications with outer diameters from 6.35mm to 19mm for stainless steel coils.
Includes precise custom bending, spiral forming, coiling, and precision drawing, tailored specifically for high-efficiency heat exchangers and HVAC coils.
Utilizes advanced laser cutting, high-speed mechanical cutting, and computer-controlled flame cutting systems to ensure accurate lengths.
We provide chemical passivation, mechanical polishing, and bright annealing processing, targeting specific surface roughness (Ra) standards.
Custom end forming and flanging designed for secure connections in automotive exhaust assemblies, chemical flow lines, and instrumentation setups.
Where absolute reliability under pressure and corrosion resistance is required.
Sihe Steel operates under strict Quality Management Systems (ISO 9001) to support industrial compliance.
Review our structural layout, materials, and configurations.
2205 duplex stainless steel containing austenitic and ferritic microstructures.
1/2 inch stainless steel coiled tubing options configured for thermal control loops.
High-temperature oxidation resistant stainless steel tubing assemblies.
Important procurement details, structural verification, and delivery timelines.
Browse additional alloys, custom capillary lines, and industrial-grade tubing.
