Sihe Steel
Sihe Steel
Explore our core selection of heavy-duty coiled tubes, capillary lines, and high-performance heat exchanger pipes manufactured to stringent global tolerances.
As an industry-leading Chinese exporter and manufacturer, Liaocheng Sihe Stainless Steel Material LTD operates six advanced production lines dedicated to fabricating high-quality stainless steel coiled tubes, precision polishing pipes, and seamless instrumentation lines. We strictly adhere to global manufacturing benchmarks, including GB, ASTM, ASME, JIS, and EN standards.
Our comprehensive metallurgical portfolio covers key austenitic steels and corrosion-resistant alloys, ensuring the integrity of critical industrial operations:
Understanding the microstructural variance and alloy chemistry of standard-grade stainless steel pipes.
Representing the standard 18/8 (Chromium-Nickel) alloy class, SUS304 is the primary choice for applications requiring excellent formability and oxidation resistance at a competitive capital cost. However, it remains vulnerable to chloride-induced pitting in marine or aggressive chemical environments.
Enhanced with 2-3% Molybdenum, SUS316 exhibits significantly higher resistance to localized pitting, crevice corrosion, and acidic compounds. Ideal for marine structures, petrochemical lines, and heavy-duty geothermal heat exchangers exposed to high chloride levels.
Both SUS304L and SUS316L are formulated with carbon levels restricted below 0.030%. This prevents intergranular carbide precipitation during welding, preserving the mechanical properties and corrosion barrier at heat-affected joints without the need for post-weld annealing.
To support high-integrity hydraulic and process networks in marine, industrial, and subsea sectors, we offer customizable sizing structures:
A peek into our processing technologies that ensure long-term mechanical reliability.
Utilizing pure hydrogen protective gas control, our continuous online bright annealing furnaces soft-treat stainless steel tubing at temperatures up to 1050°C. This ensures a clean, oxide-free surface finish both inside and outside the tube, protecting against micro-contamination.
We perform pneumatic, hydrostatic, eddy current, and air-tightness testing. Every coil undergoes hardness testing (HRB/HRC), tensile tests, flaring, flattening, and dimensional verification to guarantee they are leak-free and capable of operating under high pressure.
Through multi-stage cold drawing and precision dies, we control tight wall thickness tolerances to within +/- 0.05 mm. This creates an ultra-smooth internal bore, which helps maintain flow characteristics and prevents mineral buildup.
Delivering high-reliability tubes to severe service areas worldwide.
To support diverse hydraulic, mechanical, and engineering setups, we provide custom processing services, including bending, spiral forming, flanging, precision drawing, cutting, straightening, and surface treatment.
Precision-wound configurations tailored for spaces in HVAC evaporator matrices and industrial boilers.
State-of-the-art cutting systems yield custom-length pipes with perpendicular, burr-free end faces.
Friction-welded and formed flanges optimize joint integrity in high-vibration automotive exhaust lines and subsea control umbilicals.
Our mill holds ISO 9001 and pressure vessel standard certifications, ensuring compliance with international export regulations.
Supplying high-quality coiled tubing to over 30 countries and regions worldwide.
A closer look at our custom-processed products and advanced structural designs.
Duplex 2205 stainless steel contains balanced austenitic and ferritic microstructures, offering high mechanical strength and chloride-pitting resistance.
1/2" stainless steel coiled tubing refers to a continuous coil configuration, designed to reduce leak paths in hydraulic and chemical delivery lines.
Specifically designed for high-temperature applications, our 310/310S steel tubes provide excellent oxidation resistance under cyclic thermal loads.
Get answers regarding mechanical standards, shipping logistics, customization options, and certification frameworks.
Explore our secondary selection of specialized stainless steel pipes, including high-temperature 310S and precision capillary options.
