Sihe Steel
Sihe Steel
Explore our high-performance precision seamless & welded coiled tubing configurations engineered to global industrial standards.
High-alloy duplex coiled tubing designed for extreme chloride environments, oil and gas exploitation, and marine industries.
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Custom-engineered cooling coils providing high heat-transfer efficiency for HVAC, food processing, and chemical reactor systems.
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Nickel-iron-chromium alloy tubing with outstanding resistance to oxidation, stress corrosion cracking, and acid attacks.
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Micro-bore precision capillary tubes ideal for chromatography columns, medical instruments, and aerospace hydraulics.
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Reliable and cost-efficient seamless 304 coils for standard heat exchangers, gas transport, and chemical fluid transfer.
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Polished corrosion-resistant 409 stainless steel tubes mainly engineered for automotive exhausts and structural systems.
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Highly durable welded pipes featuring excellent oxidation resistance and thermal conductivity at high temperatures.
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Titanium-stabilized stainless steel coiled tubing delivering extraordinary stability under high temperature and pressure.
View Product DetailsAnalyzing metallurgy, production specifications, corrosion resistance mechanics, and standard compliance frameworks.
Strictly manufactured in compliance with ASTM A269, ASME SA269, EN 10216-5, and JIS G3459 standards. Certified for general corrosion-resisting and low- or high-temperature services.
Austenitic alloy 316 (and low-carbon 316L) contains 16-18% Chromium, 10-14% Nickel, and 2-3% Molybdenum, providing superb pitting resistance in harsh chloride-rich operations.
Supplied in ultra-long single continuous runs up to 32,800 feet (10,000 meters). Reduces the requirement of orbital welding connections, preventing leaks in subsea and gas distribution.
ASTM A269 designates seamless and welded nominal-wall-thickness tubing for general service applications. In critical industrial applications, the TP316/TP316L grade stands out due to the integration of Molybdenum. The low carbon content in 316L (under 0.03%) prevents carbide precipitation during welding processes, ensuring that the tubing retains its chemical integrity and structural toughness in HAZ (Heat Affected Zones). This makes it highly resistant to intergranular corrosion. Furthermore, its Pitting Resistance Equivalent Number (PREN) ranging between 23 and 25 guarantees reliability against localized crevice attacks and pitting in saline and acidic solutions.
To eliminate internal stresses and restore ductility post-cold drawing, we utilize state-of-the-art oxygen-free online bright annealing technology. Operating within a high-purity hydrogen atmosphere at temperatures exceeding 1050°C, the carbon and oxide deposits on the stainless steel are completely reduced. This process results in a scale-free, mirror-bright surface finish on both the inner diameter (ID) and outer diameter (OD). This ultra-clean surface prevents fluid friction, minimizes particulate contamination, and ensures high compatibility with high-purity applications, such as those found in the biopharmaceutical and semiconductor industries.
Max Continuous Length
Nondestructive Testing
US & Global Export Share
Advanced Production Lines
Over a decade of manufacturing innovation, delivering premium industrial coiled tubing globally.
Originating from China, Liaocheng Sihe Stainless Steel Material Ltd has a ten-year history of specializing in the production of high-performance stainless steel coils. Starting with three initial production lines, we have successfully expanded our operations to six highly advanced manufacturing lines. We strictly adhere to GB, ASTM, ASME, JIS, and EN production standards.
We are a leading developer in the field of stainless steel coiled tubes, stainless steel polishing tubes, and stainless steel seamless coiled tubing. Our steel grades include 304/304L, 316L, 321, 317L, 309S, 310S, and INCOLOY 800, alongside austenitic steels, Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625. Our tubing is widely deployed in military, semiconductor, pharmaceutical biotechnology, precision instruments, aerospace, petrochemicals, and subsea exploration. Today, 80% of our production is exported directly to global markets, including the US, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe.
Leveraging industrial clusters, advanced metallurgy, and strict quality control to deliver competitive pricing.
Located in Liaocheng, Shandong Province, we leverage localized raw material sourcing (Tisco, Baosteel) and specialized steel casting ecosystems. This minimizes transport costs and guarantees a stable supply chain, keeping our prices highly competitive.
We execute exhaustive, non-destructive testing protocols before shipment. Our facilities perform 100% hydrostatic testing, eddy current inspection, pneumatic testing, hardness verification, tensile testing, flaring, flattening, and air tightness testing to secure safe subsea operations.
From custom spool configurations and specific metallurgical compositions to custom outer diameters and wall thicknesses, we tailor our products to meet unique engineering requirements, avoiding excess material waste.
Custom machining services and critical industry operations for high-grade coiled tubing.
Supports various materials (e.g., 304, 316L, 2205) and specifications (diameter 6.35mm to 19mm) for stainless steel coils.
Includes bending, spiral forming, precision drawing, and other processes tailored for high-efficiency heat exchangers.
Utilizes laser cutting, mechanical cutting, or flame cutting for high-precision and efficient material processing.
We dedicate ourselves to developing new products with state-of-the-art technologies and surface treatments.
Specially used in automotive exhaust systems, chemical pipelines, and precision instrument connections to secure tight seals under heavy vibrations.
Seamless coiled tubing ensures efficient heat exchange rates without weld seam failures in thermal power utilities.
Designed for residential and industrial HVAC operations, maintaining pressure holding capacity for eco-friendly refrigerants.
Alloy 316 coiled tubes prevent chemical erosion in acidic, high-temperature transport piping systems.
Non-reactive, bright annealed inner tube surfaces prevent contamination, ensuring clean and hygienic processing environments.
Clean, ultra-smooth inner surfaces meet strict sanitary and safety regulations, resisting biofilm formation.
Resistant to high temperatures and pressures, ideal for superheated steam transfer and boilers.
Ensures safety and long-term durability in refining environments containing high levels of hydrogen sulfide and chloride.
Optimally sized tubing engineered to save space and reduce weight in critical hydraulic braking and fuel injection networks.
All production processes are certified under strict international quality management standards.
Comprehensive portfolio of high-grade capillary, heat exchanger, and customized stainless steel coiled tubing.
Duplex 2205 and austenitic grades designed for subsea umbilical control systems and chemical injection networks.
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1/2 inch stainless steel coiled tubing and customizable dimensions for fluid transportation systems.
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High-temperature resistant 310S coils for industrial ovens, furnace heat exchangers, and boiler systems.
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Further explore our specialized high-alloy capillary lines and industrial plate products.
Superior acid and chloride resistance, optimized for subsea downhole control systems and chemical injection wells.
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TP316 flat sheets and structural plates featuring excellent formability and resistance to crevice corrosion.
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Economical polished 201 tubing designed for indoor decoration, light structural design, and automotive applications.
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High-strength, high-corrosion-resistance duplex micro-tubing for gas analysis, instrumentation, and subsea valves.
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Heat-resistant seamless 316 exchanger pipes, manufactured to sustain prolonged high-pressure and high-temperature thermal loads.
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High-cleanliness 304 seamless coiled tubing for fluid transfer lines, beverage processing, and laboratory equipment.
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Precision welded DIN 304 pipes optimized for industrial waste handling, urban sewage, and low-pressure municipal piping.
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Precision Duplex 2205 capillary tubing designed for downhole chemical injection and heavy-duty offshore applications.
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