Sihe Steel
Sihe Steel
Direct supply from China's leading metallurgical facilities. Engineered under strict international quality guidelines.
Liaocheng Sihe Stainless Steel Material LTD: Setting structural limits and precision standards for modern industrial systems.
As a global specialist in advanced metallurgical manufacturing, we operate six highly-integrated production lines focusing on stainless steel coiled tubes, stainless steel polishing tubes, and stainless steel seamless coiled tubing. We perform precise cold-drawing, bright annealing, and dimensional control processes to comply with strict international regulatory standards.
Our operational framework strictly adheres to:
We work with premier steel alloys: 304/304L, 316L, 321, 317L, 309S, 310S, INCOLOY 800, Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625.
Understanding the micro-structure and chemical composition that guarantees high resistance to chloride stress-corrosion cracking.
AISI 316 is an austenitic chromium-nickel stainless steel containing molybdenum. The addition of molybdenum improves general corrosion resistance, enhances resistance to pitting from chloride ion solutions, and provides increased strength at elevated temperatures. 316L is the low-carbon version of 316, which prevents sensitisation during welding operations, securing the grain boundaries from carbide precipitation and preserving long-term structural integrity.
| Dimensional Metric | Imperial Range | Metric Range | Custom Availability |
|---|---|---|---|
| Outer Diameter (OD) | 0.125 inch | 3.175 mm to 25.4 mm | Completely customizable inside limits |
| Wall Thickness (WT) | Up to 0.165 inch | Up to 3.0 mm | Ultra-thin wall capillary options available |
| Single Reel Length | Up to 32,800 feet | Up to 10,000 meters | Eliminates orbital welding joints in subsea umbilical pipelines |
| Core Alloys | 304, 304L, 316L, Duplex 2205, Super Duplex 2507, Incoloy 825, Inconel 625 | ||
Increasing system reliability in subsea, upstream oil & gas, petrochemical, and military-grade applications.
As oil & gas extractions shift into deeper, harsher marine environments, subsea umbilical tubing demands extreme reliability. Our seamless coiled tubing protects chemical injection lines, preventing corrosion failures and ensuring safe operations in deep offshore sites.
Exporting to over 30 countries and regions including the US, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe. 80% of our production output serves international markets under strict global trade compliance.
Using online bright annealing, hydrostatic testing, eddy current checks, and hardness/flattening analyses, we guarantee a failure rate close to zero. We supply clean, precise tubing that matches the lifecycle expectations of modern engineering projects.
Integrating innovative metal treatment technologies to deliver high-performance surface quality and mechanical performance.
We feature world-class bright annealing technology, conducting online softening treatments in controlled protective atmospheres. This prevents surface oxidation and preserves structural ductility, giving the tube wall a high-gloss finish and superior mechanical properties.
We support various custom specifications for heat exchangers, providing bending, spiral forming, and precision drawing. We process outer diameters ranging from 6.35mm up to 19mm with exact dimensional tolerances.
To verify the mechanical properties of our tubing, we carry out continuous NDT tests, including pressure, flaring, bending, 100% hardness, tensile, and air tightness tests.
Our stainless steel tubes are engineered to perform reliably across key demanding industries worldwide.
Explore our main product lines, designed for high durability and performance in harsh industrial environments.
Duplex 2205 is a nitrogen-enhanced duplex stainless steel, combining austenite and ferrite structures to provide high strength and corrosion resistance.
1/2-inch stainless steel coiled tubing is widely used in downhole control lines, chemical injection, and instrument pipelines.
High-temperature oxidation-resistant 310 series tubing, engineered for kiln lines, combustion chambers, and furnace parts.
Our production quality control processes are fully verified. Our operations are backed by verified global quality system audits.
Technical questions answered by senior metallurgical and supply chain engineers.
Explore our wider range of stainless steel products, engineered for high resistance to heat and pressure.
