Sihe Steel
Sihe Steel
Featuring our premier range of industrial-grade coiled tubings, heat exchanger pipes, and customized steel sheets built to ASTM, EN, and JIS standards.
High-tolerance structural and fluid-channeling precision pipes manufactured to strict European and Japanese industrial parameters.
VIEW MORE PRODUCT
Specialized ferritic chromium steel pipes featuring excellent oxidation resistance, ideal for automotive exhaust systems and thermostatic configurations.
VIEW MORE PRODUCT
Robust, corrosion-resistant ferritic steel tubing options boasting superior mechanical and thermal conductivity profiles.
VIEW MORE PRODUCT
Custom-coiled refrigeration tubing with smooth internal paths to secure safe cooling dynamics for beverage and draft lines.
VIEW MORE PRODUCT
High-reliability welded tubes configured specifically for exhaust manifolds, catalytic converter casings, and muffler assemblies.
VIEW MORE PRODUCT
High-grade low carbon seamless coiled tube engineered for marine environments, petrochemical units, and subsea injection control lines.
VIEW MORE PRODUCT
High-purity flat rolled corrosion-resistant sheets suitable for constructing storage vessels, heat shields, and chemical tanks.
VIEW MORE PRODUCT
Highly alloyed duplex steel capillary tubes for extreme offshore oil exploration, offering superior yield strength and resistance to pitting.
VIEW MORE PRODUCTLiaocheng Sihe Stainless Steel Material LTD is a globally established manufacturer specializing in the advanced extrusion, drawing, and precision annealing of stainless steel coiled tubes, capillary tubes, heat exchanger pipes, and customized stainless steel sheets. Operating six modern production lines with state-of-the-art metallurgical controls, we satisfy stringent international standards, including GB, ASTM, ASME, JIS, and EN.
Our metallurgical expertise spans traditional austenitics like 304/304L, 316L, 321, 317L, 309S, 310S, and Incoloy 800, extending into highly specialized, corrosion-resistant superalloys designed for severe service environments, such as Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625.
Equipped with a proprietary inline bright hydrogen annealing line, we deliver bright, scale-free tubing characterized by exceptional surface roughness tolerances and mechanical flexibility. This level of precision makes our coiled products highly sought after in aerospace, semiconductor processing, deep-sea oil exploration, and pharmaceutical systems.
The global demand for stainless steel coiled tubing is shifting rapidly toward multi-phase alloys and super-long continuous formats. Industry research indicates three primary growth drivers shaping the manufacturing landscape:
Selecting the correct grade of coiled tubing requires aligning service stresses, thermal profiles, and aggressive chemical exposure with mechanical properties. Below is an engineering overview of the alloys we process:
The foundation of fluid system transport. 316L features low carbon content to mitigate intergranular carbide precipitation during welding, with molybdenum added to enhance pitting resistance in chloride environments.
Providing double the mechanical yield strength of standard austenitic grades, combined with high resistance to stress corrosion cracking (SCC) in seawater. Ideal for downhole chemical lines and subsea control umbilicals.
Specifically engineered for extreme hydrogen sulfide (H2S), carbon dioxide (CO2), and high-chloride conditions. Unmatched stability at elevated temperatures in refinery process columns.
Coiled tubing products are available in outer diameters (OD) ranging from 0.125 inches (3.175 mm) to 1.0 inch (25.4 mm). Wall thickness options extend up to 0.165 inches (3.0 mm). We offer continuous orbital welding and cold drawing to achieve lengths up to 32,800 feet (10,000 meters) per spool, optimized for subsea umbilical assembly and deep well operations.
For international supply procurement, verifying raw material traceabilty and test verification is essential. As a tier-one supplier, Liaocheng Sihe complies with all core global specifications:
Every spool of stainless steel coiled tubing produced at Liaocheng Sihe is subject to a rigorous testing matrix before release to guarantee structural integrity:
Liaocheng Sihe's precision coiled tubing and stainless products support mission-critical operations across multiple global industries.
Leveraging high-precision processing capabilities to deliver application-ready materials tailored directly to your engineering drawings.
We process standard and special alloy grades (e.g., 304, 316L, 2205) in custom sizes ranging from 6.35mm up to 19.05mm outer diameters.
Includes high-precision orbital bending, spiral forming, mechanical drawing, and custom coiling specifically structured for compact heat exchangers.
Utilizes laser, mechanical, or flame cutting options to output high-accuracy cut lengths with minimal burring or edge distortion.
Delivering mechanical polishing, acid pickling, and high-tech hydrogen bright annealing to prevent oxide formation and maintain clean pathways.
Providing precision end-preparation, flanging, and flare formatting commonly required for automotive exhaust connections and fluid instruments.
Advanced orbital joining of seamless sections, followed by radiographic inspection, allows us to spool continuous tubing lengths up to 10,000 meters.
Liaocheng Sihe maintains ISO 9001 registration and extensive chemical and mechanical test compliance protocols to serve critical global projects.
Established with a dedicated focus on the extrusion and cold drawing of special alloys, our plant has served international oil, gas, and industrial process markets for over 10 years. With advanced bright annealing lines, we soften stainless steel tubing online to ensure consistency in ductility and structural resilience.
Our processing lines handle everything from raw alloy extrusion to final compression, flaring, bending, hardness inspection, and air tightness testing. Today, 80% of our precision coil production is exported to major international markets, including the United States, Germany, Spain, South America, Southeast Asia, and the Middle East.
Explore our targeted product classifications engineered to meet specific industrial requirements.
Available in grades such as Duplex 2205. Features austenitic-ferritic dual-phase microstructures for excellent mechanical performance and resistance to corrosion.
VIEW CATEGORY
Precision miniature scale capillary tubing (e.g. 1/2 inch coiled styles) configured for chromatography systems, instrumentation controls, and hydraulic lines.
VIEW CATEGORY
Specifically structured for thermal environments up to 1100°C. Resists oxidation and carburization in heat treatment furnaces and boiler exhausts.
VIEW CATEGORYCommon technical and commercial questions answered by our engineering and procurement team.
Our pricing is dynamic, adjusting with international metal market trends (specifically LME Nickel, Chromium, and Molybdenum indices). Once you share your material grade, thickness, outer diameter, and volume requirements, our sales team will provide an updated, itemized price list.
Yes, all global export orders require an ongoing minimum order quantity to sustain efficiency on our production lines. For localized sub-distribution or smaller testing volumes, please reach out to us to review inventory availability.
We provide full verification documentation, including EN 10204 3.1 Material Test Certificates (MTC), Certificates of Conformity (CoC), mill test reports, positive material identification (PMI) data, export customs clearances, and marine insurance files.
Standard samples require approximately 7 business days. For full-scale volume production runs, the typical lead time is 20 to 30 days following receipt of deposit and final approval of the design drawings.
Payments can be settled via Bank Telegraphic Transfer (T/T), Western Union, or PayPal. Our standard terms are a 30% deposit in advance, with the remaining 70% balance paid upon presentation of the copy of the Bill of Lading (B/L).
We warrant our materials against manufacturing defects, crack formations, and metallurgical deviation from specified ASTM/ASME standards. We provide product support to resolve potential engineering or field issues to mutual satisfaction.
We package our coiled tubes on custom-built steel or wooden reels, secured within heavy-duty crates to prevent damage during sea transit. For sensitive alloys, we apply specialized desiccant packs and vapor-phase corrosion inhibitors (VCI).
Shipping costs depend on the delivery terms (FOB, CIF, DDP) and transport mode. Sea freight is the most cost-effective option for large bulk orders, while express courier or air freight is available for urgent, small-diameter capillary orders.
Providing specialized alloys and custom diameters to meet the demands of global industrial processing plants.
High-reliability nickel-iron-chromium alloy tubing designed to resist stress corrosion cracking and pitting in acid gas environments.
VIEW MORE PRODUCT
Economic ferritic grade piping providing good resistance to corrosion, suitable for moderate structural and exhaust configurations.
VIEW MORE PRODUCT
Featuring a polished outer diameter. Combines oxidation resistance with a clean visual finish for exhaust system applications.
VIEW MORE PRODUCT
High-temperature performance coil tubing designed for heat exchangers and boiler components operating in thermal oxidation environments.
VIEW MORE PRODUCT
Precision-drawn micro-bore capillary tubing, ideal for analytical instruments and specialized cooling networks.
VIEW MORE PRODUCT
Standard grade utility piping providing reliable service in commercial food preparation, water processing, and construction.
VIEW MORE PRODUCT
High-nickel capillary tubes offering excellent mechanical properties and resistance to stress corrosion cracking in acid environments.
VIEW MORE PRODUCT
Standard-compliant 304 welded tubes engineered to support chemical piping systems, decorative tubing, and structural projects.
VIEW MORE PRODUCT
