Sihe Steel
Sihe Steel
Direct supply from state-of-the-art cold drawing and online bright annealing lines. Engineered to exceed ASTM, ASME, EN, and JIS standards.
High-precision capillary tubing designed for analytical instruments, chromatography, and control line systems.
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Ultra-low carbon grade welded tubing with clean IDs, optimal for pharmaceutical and general process piping systems.
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Perfect for long run installations. Seamless layout minimizes orbital weld joints and leakage pathways.
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Standardized chemical injection and umbilical line tubing designed specifically for subsea oil and gas environments.
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High-quality structural sheets and plates with uniform grain orientation and superior formability specs.
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Ferritic alloy ideal for high-temperature automotive exhaust systems and structural heat shields.
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Nickel-chromium-molybdenum alloy coiled tubing for extreme downhole chemical injection and sour service gas wells.
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Titanium-stabilized austenitic stainless plate offering excellent intergranular corrosion resistance at high temperatures.
Get QuotesAs a leading Chinese innovator and premier manufacturer of high-precision stainless steel coiled tubes, polishing tubes, and seamless capillary systems, Liaocheng Sihe Stainless Steel Material LTD is dedicated to delivering superior performance. Utilizing six advanced high-capacity production lines, we ensure maximum metallurgical consistency and dimensional accuracy. Our operations adhere strictly to rigorous international standards, including GB, ASTM, ASME, JIS, and EN.
We process a comprehensive range of stainless steel and superalloy grades, carefully tailored to withstand the most demanding operating conditions:
By implementing advanced online bright annealing technology, we produce ultra-long seamless coils up to 32,800 feet (10,000 meters). This significantly minimizes weld joints, reduces leak paths, and enhances installation efficiency.
Detailed dimensional boundaries and chemical design configurations supporting global industrial engineering.
| Alloy Group | Material Grades | Outer Diameter (OD) Range | Wall Thickness (WT) Range | Max Continuous Length | Key Applications |
|---|---|---|---|---|---|
| Austenitic Steel | 304/304L, 316L, 317L, 321 | 0.125 in to 1.00 in (3.175 - 25.4 mm) | Up to 0.165 in (3.0 mm) | Up to 32,800 ft (10,000 m) | Chemical processing, instrumentation, heat exchangers, HVAC, marine environments |
| Duplex & Super Duplex | Duplex 2205, Super Duplex 2507 | 0.250 in to 0.750 in (6.35 - 19.05 mm) | Up to 0.120 in (3.0 mm) | Up to 15,000 ft (4,572 m) | Offshore drilling, subsea control lines, desalinization, chloride-heavy pipelines |
| Nickel Superalloys | Incoloy 825, Inconel 625, Incoloy 800 | 0.125 in to 0.500 in (3.175 - 12.7 mm) | Up to 0.095 in (2.41 mm) | Up to 10,000 ft (3,048 m) | Extreme sour gas wells, subsea umbilicals, deep-water oil extraction, aerospace systems |
| Special Heat Resistant | 309S, 310S | Custom Mill Specs Available | Custom Mill Specs Available | Based on Project Specs | Industrial boiler systems, high-temperature furnace tubes, heat treatment lines |
Using an inline hydrogen-shielded protective furnace, our seamless tubes undergo continuous thermal processing. This maintains microstructural ductility, eliminates residual cold-drawing stress, and prevents oxide scaling on both inner and outer surfaces.
Every meter of tubing undergoes rigorous quality control. This includes compressed flaring tests, expansion tests, tensile tests, hardness verifications, non-destructive eddy current testing, and high-pressure hydrostatic/air-tightness inspections to guarantee zero defects.
We provide comprehensive, end-to-end custom machining solutions. Our services include high-precision laser cutting, mechanical straightening, custom radius bending, spiral winding, orbital welding, and specialized end flanging to simplify your installation process.
Modern subsea oil exploration, high-purity chemical processing, and aerospace engineering leave no room for error. The cost of component failure in offshore structures, subsea umbilicals, or downhole environments is measured in millions of dollars and severe environmental risks. Our primary mission is to help design and engineer the "right" corrosion-resistant coiled tubing solutions to ensure your operations run safely and reliably.
With a proven export footprint spanning more than 30 countries and regions—including the US, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe—we possess deep, localized regulatory and logistics experience. We ensure full compliance with international standards, helping you streamline your supply chain and reduce operational downtime.
Continuous Production Lines
Max Continuous Coil Feet (10,000m)
Countries and Regions Served
Online Quality Testing Compliance
How our high-precision, long-length coiled tubes perform in critical global industrial environments.
Optimized for efficient thermal transfer and high structural integrity under intense pressure. Ensures minimal thermal fatigue and resistance to oxidation.
Provides seamless, leak-free performance for volatile refrigerant transportation, preventing leak-related environmental issues.
Built to withstand aggressive organic acids, chloride pitting, and hydrogen sulfide stress corrosion in continuous flow systems.
Features an ultra-smooth inner surface (low Ra) to prevent bacterial growth and meet strict global food safety standards.
High-purity capillary and polishing tubes designed for sanitary lines, fluid diagnostics, and active pharmaceutical ingredient lines.
Designed for high-temperature superheaters, condensers, and solar-thermal installations handling high thermal cycling.
Engineered for high-pressure catalytic cracking loops and corrosive hydrocarbon processing environments.
Designed for high-pressure fuel lines, aerospace hydraulics, and critical component routing where failure is not an option.
We provide value-added processing services to deliver seamless tubing prepared exactly for your integration needs.
We provide precision bending, tight radius configurations, and pre-formed helical spiral coils to fit your heat exchangers, cooling jackets, and instrument envelopes without the need for manual fabrication.
Our facility offers custom laser, mechanical, or flame cutting options to deliver burr-free ends, as well as high-tolerance straightening services for optimal fit and function.
Specialized end-forming, including flanged ends, flared joints, and pre-swaged fittings, tailored for quick connections in automotive exhaust networks and chemical process lines.
Our production practices are backed by comprehensive certifications, ensuring full traceability and engineering compliance.
Explore our core business categories designed to serve global manufacturing networks.
Duplex 2205 combines austenitic and ferritic properties, offering exceptional strength and resistance to chloride stress corrosion cracking.
High-demand size configurations available in custom wall thicknesses for hydraulic control lines and instrumentation systems.
Excellent resistance to oxidation and carburization in high-temperature environments up to 1100°C.
Crucial information regarding technical specifications, ordering processes, and supply chain logistics.
Ensure seamless flow and maximum safety in your industrial piping systems with our premium product line.
Duplex stainless steel alloy designed for high-stress chloride environments and chemical processing systems.
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Nickel-chromium-molybdenum alloy capillary tubes with outstanding resistance to pitting and crevice corrosion.
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Standard grade 304 capillary tubing, offering excellent formability and oxidation resistance at a competitive price.
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Polished exterior and interior surfaces, designed for high-aesthetic architectural or general industrial piping.
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High-tolerance structural tubing, optimized for cost-effective manufacturing and structural setups.
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Dual-certified 304/304L seamless tubing designed for broad chemical resistance in fluid control lines.
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Engineered for automotive exhaust manifolds, offering reliable high-temperature and fatigue resistance.
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Manufactured to JIS and DIN standards. High dimensional accuracy for industrial assembly frameworks.
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