Sihe Steel
Sihe Steel
High-performance stainless steel coiled tubing, heat exchanger pipes, and custom-engineered plates tailored for severe industrial applications.
Premium grade austenitic 316 stainless steel coils offering superior pitting resistance and mechanical properties for chemical and marine infrastructure.
Excellent oxidation resistance under cyclic heating. Ideal for petrochemical reactors, radiant tubes, and high-temperature thermal processing systems.
High-chromium and nickel alloy structure engineered to resist scale formation and creep at operating temperatures reaching up to 1150°C.
Compliant with Japanese Industrial Standards, featuring excellent weld integrity and dimensional consistency for process line networks.
Ferritic, straight-chromium non-hardenable grade combining good corrosion resistance and formability with cost-effective pricing dynamics.
Martensitic alloy designed for parts requiring high strength, wear resistance, and mild corrosion defense under heat-treated conditions.
Duplex microstructured tubing showcasing exceptional yield strength, low thermal expansion, and resistance to chloride stress corrosion cracking.
High-nickel superalloy tubing designed to withstand aggressive chemical environments, oxidation, and high temperatures without structural fatigue.
The ASTM A213 (ASME SA213) standard governs seamless ferritic and austenitic alloy steel boilers, superheaters, and heat exchanger tubes. Unlike standard pipe specifications, A213 tubes undergo stringent quality tests, making them the default choice for critical utility systems, power generation cycles, and complex chemical processes.
Global demand is shifting towards high-temperature, high-pressure environments, requiring specific grades such as TP304, TP316L, TP321, and the advanced high-alloy and duplex grades. In these systems, dimensional accuracy, grain size control, and chemical homogeneity are vital parameters that directly affect operational lifespan and pressure ratings.
The evolution of high-alloy systems is shaped by decarbonization, subsea extraction, and process industry automation.
As oil and gas projects move deeper offshore, control umbilical systems require high-pressure, corrosion-resistant alloy tubing. Materials like Incoloy 825, Duplex 2205, and Super Duplex 2507 are replacing basic carbon and low-alloy steels to prevent pitting and crevice corrosion under high-salinity conditions.
High-precision semiconductor, instrumentation, and pharmaceutical sectors require bright-annealed, ultra-clean inner surface tubes. Achieving low surface roughness (Ra) minimizes micro-contamination risk, preventing product degradation and keeping equipment downtime to a minimum.
Modern heat exchangers rely on thin-walled, long-length continuous coiled tubing. Removing weld seams across lengths up to 10,000 meters reduces potential leak points, improves heat transfer efficiency, and cuts installation labor costs for geothermal and industrial condenser systems.
Liaocheng Sihe Stainless Steel Material LTD uses smart manufacturing workflows to produce seamless tubing and coiled configurations. Combining local metallurgy supply chains with advanced equipment reduces production losses, shortens setup times, and lowers baseline costs.
Our integrated plant features state-of-the-art online bright annealing. Annealing in a controlled hydrogen/nitrogen atmosphere prevents oxidation scale without requiring acid pickling. This results in a cleaner, smoother surface profile (both internally and externally) and minimizes microscopic surface micro-cracks, enhancing safety in high-stress installations.
Standard dimensional range, raw materials, and processing capabilities at Liaocheng Sihe.
| Feature / Parameter | Technical Specifications & Range | Applications & Material Grades |
|---|---|---|
| Outer Diameter (OD) | 0.125 inch (3.175 mm) to 1.00 inch (25.4 mm) | Precision instrumentation, capillaries, and standard process systems |
| Wall Thickness (WT) | Up to 0.165 inch (3.0 mm) | High pressure hydraulic circuits, boilers, and exchangers |
| Continuous Length | Up to 32,800 feet (10,000 meters) without orbital welds | Umbilicals, geothermal heat exchangers, control lines |
| Material Grades | 304/304L, 316/316L, 321, 317L, 309S, 310S, INCOLOY 800 | Austenitic heat resistant, acid resistant, and structural grades |
| Specialty Alloys | Duplex 2205, Super Duplex 2507, Incoloy 825, Inconel 625 | Extreme marine environment, offshore gas extraction, hot corrosive fluids |
| Industry Standards | GB, ASTM (A213, A269, A789, A312), ASME, JIS, EN | Global compliance matrix with structural verification certificates |
Our downstream processing services provide customized profiles and shapes to simplify installation on site.
We support various materials (e.g., 304, 316L, 2205) and custom specifications, with outer diameters ranging from 6.35mm to 19mm for stainless steel coils.
Includes advanced bending, continuous spiral forming, and precision drawing, designed specifically for heat exchanger installations.
High-precision laser cutting, mechanical cutting, and straightening services that meet strict dimensional specifications.
We develop high-performance surface treatments using modern technologies, yielding clean, passivation-treated surfaces with low roughness.
End-flanged tube solutions designed for automotive exhaust connections, chemical pipelines, and high-vibration precision instrument couplings.
Our tubing solutions perform reliably under high operating pressures and temperature extremes.
Long-length coiled tubing that eliminates weld joints, maximizing heat-transfer efficiency and reducing leak points in steam condensers.
Clean, seamless, and flexible tubing designed to withstand high pressure cycles in fluorinated and natural refrigerant circuits.
Resists organic acids and chloride solutions. Crucial for reaction vessels, distribution channels, and processing loops.
Sanitary tubing with smooth internal walls that prevent product buildup, supporting clean-in-place (CIP) sanitation protocols.
Ultra-pure inner surface finishes that prevent microbial contamination in WFI (Water for Injection) systems and chemical syntheses.
Provides high creep-rupture strength, making it ideal for superheater and reheater loops in modern subcritical and supercritical fossil-fuel boilers.
Resists sulfide stress cracking and high-temperature sulfur corrosion in downstream distillation units and refining processes.
Provides excellent strength-to-weight ratios and high-temperature gas resistance, ideal for precision fuel injection lines and hydraulic tubing.
Liaocheng Sihe Stainless Steel Material LTD has specialized in high-performance stainless steel coils and tubing for over ten years. Operating three advanced coil production lines and a total of six product lines, we manufacture custom-engineered tubing options designed for demanding industrial applications.
By using advanced bright annealing technologies, we perform inline thermal softening treatments that result in high-purity internal surfaces. To ensure long-term reliability in aggressive marine and high-pressure settings, we run strict quality assurance checks, including flaring, flattening, ultrasonic testing, 100% hydrostatic testing, and chemical analysis.
Our products are exported to more than 30 countries and regions, including the United States, Germany, Spain, South America, the Middle East, and Southeast Asia. We work closely with our partners to supply standard-compliant, corrosion-resistant tubing solutions for subsea, boiler, and chemical process systems.
Our operations conform to global standards, supported by certified quality management and testing protocols.
Our specialized collections meet diverse industrial demands, from ultra-fine capillary systems to heavy-duty heat exchangers.
Duplex 2205 is a nitrogen-enhanced duplex stainless steel designed to address common corrosion challenges experienced with 300 series alloys.
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1/2-inch stainless steel coiled tubing is engineered for easy shaping and runs, making it ideal for high-pressure control manifolds.
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High-temperature grade 310 steel coils manufactured in China, designed for furnace tubes, burner parts, and thermal processing plants.
View More ProductOur extensive high-alloy portfolio supports large-scale industrial projects worldwide.
Engineered to support efficient heat transfer and resist chemical attack in high-temperature shell and tube configurations.
Precision-drawn capillary tubes with narrow tolerances, suited for instrumentation, sensor systems, and fluid metering lines.
Duplex alloy tubing that balances mechanical strength and corrosion resistance, reducing weight requirements in offshore structures.
Low-carbon coil tube engineered to resist sensitization at weld zones during oil field and petrochemical installations.
Cost-efficient structural tubing designed for high-stress exhaust and mechanical applications requiring moderate corrosion protection.
Standard industrial piping designed for corrosive chemicals, fluid transport, and architectural installations.
Hygienic 304 stainless steel tubing bent and processed for food-grade heat exchange and cooling coils.
Versatile and corrosion-resistant steel plates, ideal for constructing industrial tanks, process vessels, and structural components.
Find answers to common questions about our technical capabilities, quality assurance, pricing, and order fulfillment.
