Sihe Steel
Sihe Steel
Explore our premium grade seamless coiled tubes, heat exchanger pipes, and customized stainless plates engineered for critical structural integrity.
Supporting high-performance infrastructure transitions across global petrochemical, pharmaceutical, and energy frameworks.
Operating in deepwater offshore environments exposes transport lines to extreme pressures and chloride stress-corrosion cracking (SCC). Our premium SUS304, Duplex 2205, and Incoloy 825 seamless coiled umbilical tubing lines offer structural flexibility and superior tensile strength, ensuring safe offshore chemical injection and hydraulic control circuits.
Semiconductor cleanrooms and biopharmaceutical pipelines require inner surfaces completely free of micro-cracks and weld seams. Our bright annealed and interior polished (EP) capillary tubes minimize contamination risk, facilitating sterile transfer mechanisms and upholding strict sanitation standards.
Boilers, heat exchangers, and cooling systems demand high thermal conductivity combined with corrosion resistance. By integrating our continuous long-length coiled tubes (up to 10,000 meters without orbital welds), engineering teams significantly mitigate fluid bypass leaks and systemic pressure drops.
Established in China with over ten years of manufacturing experience, Liaocheng Sihe Stainless Steel Material LTD operates three specialized production lines for stainless steel coils and six total lines for sheet and pipe fabrication. We are a leading authority in coiled tubing, polished pipes, and seamless tubing networks.
Our facility implements the world's most advanced Online Bright Annealing Technology, enabling continuous softening treatment under a protective atmosphere. This ensures that every pipe retains uniform mechanical properties and a pristine bright finish, completely avoiding structural oxidation.
Our core catalog includes Austenitic Grades: 304/304L, 316L, 321, 317L, 309S, 310S, and INCOLOY 800. Additionally, we work with specialized high-corrosion materials such as Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625. Our products are exported to over 30 countries and regions, with 80% of our coil supply serving clients across North America, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe.
Analyzing critical supply chain challenges, international regulatory compliance, and material standards across target jurisdictions.
International trade dynamics demand that custom tube products align with destination country tariffs and import regulations. By offering detailed certificates of origin, manufacturing compliance documentation, and clear Incoterms processing, we simplify distribution pipelines for bulk orders entering key regions, including North America, the European Union, and Southeast Asia.
All bulk metal distribution is packed in robust, export-certified configurations—including ocean-worthy reinforced wooden boxes or steel frames—protecting components from sea-spray corrosion and mechanical warping during long-distance transit.
We align our production with multiple standardized testing matrices to meet regional project requirements:
Our facility offers customized processing and precision dimensional ranges to meet exact engineering specifications.
| Dimensional Metric | Available Configuration Range | Processing & Custom Capabilities Available |
|---|---|---|
| Outer Diameter (OD) | 0.125 inch (3.175 mm) to 1.0 inch (25.4 mm) | Precision cold drawing, sizing calibration |
| Wall Thickness (WT) | Up to 0.165 inch (3.0 mm) | Tolerances controlled down to ±0.05 mm |
| Single Coil Length | Up to 32,800 feet (10,000 meters) | Orbital weld-free continuous extrusion |
| Surface Finishes | Bright Annealed (BA), Mechanically Polished (MP), Electropolished (EP) | Custom roughness Ra < 0.4 μm achievable |
| Destructive & NDT Testing | 100% Hydraulic, Eddy Current, Hardness, Flaring, Flattening, Bending | Complete trace certification provided per batch |
Bending, spiral forming, coiling, and precision elbow shaping custom-fit for HVAC condensers and boiler loops.
High-precision laser and mechanical cutting options ensure clean, burr-free edges ready for onsite orbital welding.
Specialized end-forming, including flanging and expanding, designed for direct sealing in automotive exhaust and chemical couplings.
Custom stainless tube profiles configured for diverse operational environments, from offshore energy hubs to precision clinical systems.
Optimized for efficient heat transfer and thermal expansion resistance in extreme temperature cycles.
Designed for leak-free coolant flow in high-cycle vibration environments.
Built with acid-resistant alloys to prevent galvanic corrosion and pitting under harsh process conditions.
Constructed with food-grade SUS304/SUS316L, supporting CIP (clean-in-place) sterilization systems.
Engineered to meet stringent bio-burden limits with high-purity electropolished interior pipe options.
Engineered to withstand high-pressure steam distribution and reduce crevice corrosion risk.
Designed for sour gas transport, protecting pipelines against hydrogen-induced cracking (HIC).
Precision capillary and exhaust piping built to withstand vibration and high thermal cycles.
Our quality control program is backed by international certifications, ensuring trace code transparency from raw melt to finished product.
Adapting manufacturing technologies to meet the evolving demands of hydrogen energy and green manufacturing.
As the hydrogen energy sector expands, metal piping faces the challenge of hydrogen embrittlement. Liaocheng Sihe is currently developing advanced inner-wall passivation techniques and low-permeability coatings, engineered to isolate hydrogen molecules and maintain long-term pipeline safety.
We are working to integrate clean energy into our bright annealing lines to minimize carbon emissions per ton of steel processed. Additionally, our scrap recovery program ensures that over 90% of raw processing materials are recycled back into high-grade alloy production cycles.
Comprehensive technical and commercial support answers for global procurement teams and engineers.
Explore our specialized coiled tubing profiles, high-alloy sheets, and heat exchanger pipes for high-temperature and corrosive applications.
Duplex 2205 alloys combining high yield strength with strong chloride resistance.
1/2-inch coiled tubing, custom-spooled for downhole instrumentation loops.
High-temperature oxidation resistant lines for heat treatment applications.
