Sihe Steel
Sihe Steel
Direct factory supply featuring optimized microstructures and superior dimensional tolerances.
Stainless steel coiled tubing represents a significant advancement in fluid dynamics, hydraulic control, and structural layout optimization. Unlike conventional straight-length pipes, coiled tubing provides B2B buyers with a continuous, seamless, or orbitally-welded line system that eliminates the structural vulnerability of mechanical fittings, flanges, and manual field welds. By minimizing localized stresses and pressure drops, coiled tubings offer long-term operational safety, specifically within subsea downhole, petrochemical processing, and precision cooling architectures.
From a metallurgical perspective, the manufacturing of continuous coils requires extreme grain refinement and precise cold drawing techniques to maintain uniform tensile properties across the entire length. Any structural variations, wall eccentricities, or micro-cracks can cause critical system failures under high pneumatic or hydraulic pressures. By deploying high-purity raw materials and online induction bright annealing, Liaocheng Sihe achieves consistent corrosion resistance, predictable yield strength, and reliable mechanical properties, meeting the high standards required by global engineers.
For over ten years, Liaocheng sihe stainless steel material LTD has been a leading manufacturer of high-quality stainless steel coiled tubes, stainless steel polishing tubes, and stainless steel seamless coiled tubing. Utilizing six advanced production lines, the company operates in strict compliance with GB, ASTM, ASME, JIS, and EN manufacturing standards.
Our comprehensive production program covers a wide range of steel types including standard austenitic grades 304/304L, 316L, 321, 317L, 309S, 310S, and INCOLOY 800, along with high-performance alloys such as Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625. To meet demanding industrial applications, coiled tubing is available in outer diameters ranging from 0.125 inches (3.175 mm) to 1 inch (25.4 mm), with wall thicknesses up to 0.165 inches (3 mm). Single, continuous coil lengths of up to 32,800 feet (10,000 meters) can be manufactured without orbital welds, providing B2B buyers with reliable materials for critical subsea umbilical and oilfield applications.
How Sihe Steel combines metallurgical precision, cost-effective scaling, and state-of-the-art bright annealing technologies.
We use inline induction bright annealing technologies under high-purity hydrogen shielding. This process preserves the metallic luster of the tubing, minimizes surface scaling, and ensures optimal soft properties, ductility, and high corrosion resistance.
By leveraging direct raw material partnerships and integrating the entire drawing, annealing, testing, and coiling process under one roof in Liaocheng, China, we offer competitive bulk prices without middleman markups.
Every batch of stainless steel coiled tubing is shipped with a comprehensive Mill Test Report (MTR). This includes detailed chemical compositions, mechanical test results, grain size analysis, and verification of compliance with ASTM A269 or EN 10217 standards.
Select the right corrosion-resistant alloy according to your specific environment and working pressure.
| Alloy Grade | UNS / EN Designation | Microstructure Category | Key Chemical Profile | Primary Industrial Use Cases |
|---|---|---|---|---|
| 304 / 304L | UNS S30400 / 1.4301 | Austenitic Steel | 18% Cr - 8% Ni | General food & beverage processing, automotive fuel paths, instrument manifolds. |
| 316L | UNS S31603 / 1.4404 | Austenitic Steel | 16% Cr - 10% Ni - 2% Mo | Chemical processing systems, marine instrumentation, pharmaceutical loops. |
| Duplex 2205 | UNS S31803 / 1.4462 | Austenitic-Ferritic | 22% Cr - 5% Ni - 3% Mo - 0.18% N | High-pressure offshore umbilicals, sour gas handling, subsea chemical injection. |
| Incoloy 825 | UNS N08825 / 2.4858 | Nickel-Iron-Chromium | 38% Ni - 21% Cr - 3% Cu - 1.5% Mo | Deep downhole geothermal wells, sulfuric and phosphoric acid production environments. |
| Inconel 625 | UNS N06625 / 2.4856 | Nickel-Chromium-Molybdenum | 58% Ni - 21% Cr - 9% Mo - 3.6% Nb | Aerospace propulsion, waste heat recovery systems, offshore riser systems. |
From aerospace hydraulics to subsea installations, our coiled tubings are designed for long-term reliable performance.
Our continuous, joint-free coiled tubes improve thermal efficiency and simplify assembly in helical and U-tube heat exchangers.
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Provides leak-free loops for refrigerant flow, heat recovery wheels, and industrial air handling systems.
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Engineered to handle corrosive organic acids, high-temperature gas feeds, and aggressive fluid processing lines.
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Smooth inner surfaces meet food safety requirements, facilitating CIP (Clean-in-Place) and preventing product cross-contamination.
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High-purity capillary coiled tubing, electro-polished to meet sanitary piping standards for bio-reactor networks.
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Used for steam generator tubing, condenser cooling loops, and high-pressure steam distribution paths.
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Resists H2S attack and high pressures in downstream catalytic cracking and upstream oil recovery fields.
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Designed for aircraft structural hydraulic lines, high-pressure common rail fuel injection, and braking systems.
Learn More →We support various custom specifications to provide tailored product configurations for different applications.
We process various materials (including 304, 316L, and 2205) and custom specifications, offering diameter options ranging from 6.35 mm to 19 mm.
We offer specialized custom services, including bending, spiral forming, and precision drawing, designed to simplify heat exchanger production.
Our facilities support laser, mechanical, and flame cutting, ensuring high dimensional accuracy and clean, burr-free ends.
We offer various surface finishes, including acid pickling, bright annealing, mechanical polishing, and electro-polishing (EP) for ultra-high purity applications.
Provides robust ends and connection points for automotive exhaust installations, chemical pipelines, and instrument configurations.
All tubing undergoes a complete testing protocol, including flare, flattening, hydrostatic, eddy current, hardness, and air tightness tests.
Our manufacturing processes are certified to meet international quality, safety, and performance standards.
Explore our full line of specialized stainless steel coiled and capillary tubing solutions.
2205 stainless steel is a duplex stainless steel containing austenitic and ferritic structures, offering high resistance to stress corrosion cracking.
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1/2" stainless steel coiled tubing refers to a coil of stainless steel tubing that provides continuous, leak-free performance over long distances.
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China 310 Steel Coil Tube Factories: Leading manufacturing centers producing high-temperature heat-resistant coiled tubes.
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Standard and heavy-walled options available to meet high-pressure piping specifications.
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Small-bore tubing designed for gas chromatography, analytical instruments, and precision control lines.
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High-yield-strength alloys designed to resist localized pitting and chloride stress corrosion cracking.
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High-finish, oxygen-free heat-treated tubing designed for clean process environments.
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Thick-walled options designed for high pneumatic and hydraulic operating pressures.
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Cost-effective, cold-drawn options designed for heat recovery systems and structural piping loops.
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Pre-formed coils bent to specified diameters for direct tank insertion and process heating.
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Tubing with polished inner and outer surfaces, designed for food, pharmaceutical, and high-purity processes.
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Monel, Inconel, and Incoloy options designed for high-stress, corrosive offshore and downhole environments.
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Designed to prevent cross-fluid contamination in high-safety thermal applications.
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Designed to meet strict dimensional tolerances for pneumatic control boards and offshore manifolds.
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Polished, capped, and double-bagged tubing designed for immediate cleanroom installation.
VIEW MORE PRODUCT →Ordering custom coiled tubing for international industrial projects requires careful planning, strict quality control, and reliable logistical coordination. Liaocheng Sihe is structured to support global buyers with clear documentation and reliable shipping procedures.
Minimum Order Quantities (MOQ): We maintain standard MOQ guidelines for international shipments to optimize container space and keep production costs competitive. For smaller quantities or customized runs, please contact our team to discuss alternative configurations.
Lead Times & Shipping: Standard sample production takes approximately 7 days, while full production orders are typically processed within 20 to 30 days of design approval and deposit confirmation. We use reinforced wooden reels and heavy-duty shrink packaging to protect the coils during transport. Full sea freight services are coordinated directly from Qingdao Port or Shanghai Port, ensuring reliable delivery to global destinations.
Answers to common technical, logistics, and commercial questions for B2B buyers.
Our prices are subject to change depending on supply and other market factors. We will send you an updated price list after your company contact us for further information.
Yes, we require all international orders to have an ongoing minimum order quantity. If you are looking to resell but in much smaller quantities, we recommend you check out our website.
Yes, we can provide most documentation including Certificates of Analysis / Conformance; Insurance; Origin, and other export documents where required.
For samples, the lead time is about 7 days. For mass production, the lead time is 20-30 days after receiving the deposit payment. The lead times become effective when (1) we have received your deposit, and (2) we have your final approval for your products. If our lead times do not work with your deadline, please go over your requirements with your sale. In all cases we will try to accommodate your needs. In most cases we are able to do so.
You can make the payment to our bank account, Western Union or PayPal: 30% deposit in advance, 70% balance against the copy of B/L.
We warranty our materials and workmanship. Our commitment is to your satisfaction with our products. In warranty or not, it is the culture of our company to address and resolve all customer issues to everyone’s satisfaction.
Yes, we always use high quality export packaging. We also use specialized hazard packing for dangerous goods and validated cold storage shippers for temperature sensitive items. Specialist packaging and non-standard packing requirements may incur an additional charge.
The shipping cost depends on the way you choose to get the goods. Express is normally the most quickest but also most expensive way. By seafreight is the best solution for big amounts. Exactly freight rates we can only give you if we know the details of amount, weight and way. Please contact us for further information.
Our factory inventory covers key engineering specifications for chemical processes and high-pressure fluid control.
