Sihe Steel
Sihe Steel
Manufactured to strict ASTM B444 specifications, optimized for local Czech hydraulic and industrial processing requirements.
Ultimate corrosion and pressure rating matching EN 10216-5, suited for Central European petrochemical environments.
Seamless coiled configuration up to 10,000 meters, ideal for umbilical fabrication in energy and geothermal sectors.
Micro-bore 3.2*0.5mm tubing with tight tolerance profiles, ready for modern automotive and assembly operations.
The Czech Republic has long stood as an industrial powerhouse within Central Europe, anchoring robust supply chains in automotive manufacturing, high-precision engineering, chemical processing, and energy development. As these sectors transition towards higher operating temperatures, aggressive chemical media, and stringent environmental regulations, the demand for premium corrosion-resistant materials has escalated. Among these, Inconel 625 (UNS N06625) capillary tubing plays a critical role as the biological and mechanical "nervous system" for modern fluid control, instrumentation, and chromatography apparatuses.
From a metallurgical perspective, Inconel 625 is an austenitic nickel-base superalloy, strengthened primarily by the addition of niobium (Nb) and molybdenum (Mo) into its nickel-chromium matrix. This distinct formulation provides unparalleled resistance to aggressive media like sulfuric and phosphoric acids, pitting, and crevice corrosion. Capillary tubing made from this alloy exhibits exceptional mechanical strength, holding up structural integrity at cryogenic ranges up to 982°C (1800°F). These performance parameters are key for Czech factories and engineering offices looking to deploy robust tubing systems capable of surviving decades without localized failures.
Liaocheng Sihe Stainless Steel Material LTD specializes in bridging the gap between high-precision Chinese metallurgical manufacturing and the localized requirements of the Czech industrial market. By implementing state-of-the-art bright annealing technology, we produce capillary tubes with interior surfaces that are incredibly smooth (low Ra values), minimizing turbulence and particulate deposit risks. This is critical for analytical applications such as High-Performance Liquid Chromatography (HPLC) and Ultra-Performance Liquid Chromatography (UPLC), which are heavily utilized by pharmaceutical and biochemical research hubs in Prague, Brno, and Ostrava.
Unlike standard tubing solutions, Liaocheng Sihe's Alloy 625 capillary tubes undergo online softening treatments under a dynamic hydrogen atmosphere. This process prevents oxidation and maintains precise mechanical ductility, facilitating smooth bending, flanging, and installation in complex manifolds without risking stress cracking.
Our Inconel 625 capillary and coiled tubes are manufactured to strict global engineering standards, guaranteeing reliability in high-pressure and highly corrosive systems.
| Parameter | Inconel 625 (UNS N06625) Specification | Equivalent Standards Compliance |
|---|---|---|
| Chemical Composition | Ni (58.0% min), Cr (20.0-23.0%), Mo (8.0-10.0%), Nb+Ta (3.15-4.15%), Fe (5.0% max) | ASTM B444, EN 2.4856, ISO 15156-3 |
| Size Range Available | OD: 0.125 inch (3.175 mm) to 1.0 inch (25.4 mm) | Custom micro-bore sizing down to 0.5 mm OD |
| Wall Thickness Range | Up to 0.165 inch (3.0 mm) depending on outer diameter | Tolerance matching ± 0.05 mm (or tighter on request) |
| Mechanical Properties | Tensile Strength ≥ 827 MPa; Yield Strength ≥ 414 MPa; Elongation ≥ 30% | GB/T 14976, ASTM A213, ASME SB444 |
| Surface Quality | Bright Annealed (BA), Electro-polished (EP) on demand | Internal surface roughness Ra ≤ 0.4 μm |
| Testing Protocols | 100% Eddy Current, Ultrasonic, Flaring, Bending, Tensile, Hydrostatic & Air-Tightness Tests | EN 10204 3.1 Certified Documentation |
Liaocheng Sihe Stainless Steel Material LTD is a premiere metallurgical enterprise operating six advanced production lines dedicated to high-quality stainless steel and nickel alloy developments. Over the past decade, we have established ourselves as the key manufacturer of stainless steel coiled tubing, bright annealed precision pipes, and super-long heat exchanger systems.
Our commitment to rigorous international standards (including ASTM, ASME, GB, JIS, and EN) has allowed us to deliver safety-critical products to major industrial hubs globally. By introducing the world's first-class bright annealing technology, we are capable of performing online softening treatments on pipes, giving them outstanding dimensional accuracy and high ductility.
In addition, our advanced QC labs conduct a full battery of physical tests, including mechanical compression, flaring, bending, 100% tensile profiling, and high-pressure air-tightness verification. Currently, 80% of our precision coil exports support installations in the United States, Germany, Spain, Eastern Europe, and the Czech Republic.
Broad spectrum metallurgical solutions, optimized for chemical, cooling, heat-exchange, and high-pressure fluid installations in Central Europe.
High-grade duplex exchanger pipes designed to withstand aggressive chloride stress cracking in cooling environments.
Customizable coiled lengths ideal for geothermal loops, deep-well instrumentation, and chemical processing networks.
Pre-fabricated cooling coils for optimal heat transfer efficiency in breweries, HVAC, and food processing systems.
High durability, seamless drawing formulation for hydraulic instrumentation lines in European assembly centers.
Excellent mechanical profiling for food processing and general industry instrumentation manifolds.
Engineered with PREN > 42 to offer ultimate resistance to chloride crevice corrosion and pitting.
Premium straight lengths for structural and high-pressure fluid delivery assemblies in chemical labs.
Highly accurate dimensional tolerance profile, configured for electronic sensors and precision micro-jets.
Titanium-stabilized austenitic stainless steel plate featuring superior intergranular corrosion properties.
Highly resistant to chloride-rich offshore and onshore processing systems, conforming to NACE standards.
Optimized for elevated temperature performance up to 1150°C, offering excellent resistance to oxidation.
Excellent mechanical properties under thermal shocks, highly utilized in furnace pipelines and heaters.
We support various materials (e.g., 304, 316L, Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625) and standard dimensions (OD 6.35 mm to 19 mm) for customized product parameters.
Advanced engineering services including complex structural bending, spiral coiling, precision capillary drawing, and tailored layouts for heat exchangers.
High-efficiency operations utilizing modern laser cutting, mechanical grinding, and straight cut-to-length services for demanding tolerance specs.
We supply fine finishes including Bright Annealed (BA), electropolished (EP), and acid-pickled surfaces, supporting ultra-clean requirements.
End processing and pipe flanging designed for secure integration into automotive exhaust loops, high-pressure instruments, and chemical systems.
All precision coils undergo thorough pneumatic, air-tightness, and hydro-testing protocols to ensure leak-free operations under high pressure.
Understanding the logistical and regulatory complexities of importing industrial goods into the European Union is a core part of our service. Liaocheng Sihe coordinates seamless deliveries directly to Czech industrial centers such as Central Bohemia, Plzeň, South Moravia, and Ostrava.
All exports undergo strict compliance verification to meet EU regulations, including the Pressure Equipment Directive (PED 2014/68/EU). This ensures that any pressure lines or capillary tubing networks installed in Czech factories comply with local occupational safety regulations and European standard inspections.
Liaocheng Sihe’s technical team is ready to analyze your drawings, size tolerances, and operating pressure specifications to deliver a customized technical proposal.
Our average response time for standard inquiries is under 12 hours.
Get in touch with Liaocheng Sihe Stainless Steel Material LTD. We provide custom engineering support, certified quality assurance, and reliable logistics into the Czech Republic and Central European markets.
