Sihe Steel
Liaocheng Sihe Stainless Steel Material Ltd — China's trusted manufacturer of high-quality stainless steel coiled tubes, polished pipes, and seamless tubing. Compliant with GB, ASTM, ASME, JIS and EN standards. Serving 30+ countries worldwide.
Liaocheng Sihe Stainless Steel Material Ltd is a leading expert in the field of stainless steel coiled tubing, polishing tubes, and seamless coiled tubing. With six dedicated production lines and over a decade of manufacturing experience, we combine world-class bright annealing technology with rigorous quality control to deliver products that meet the most demanding global standards.
Our products are manufactured in strict accordance with GB, ASTM, ASME, JIS, and EN standards, serving clients across the US, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe. As more oil and gas extractions move into deeper and harsher environments, we help you use the "right" corrosion-resistant material to improve safety and reliability.
From flexible seamless coils to precision capillary tubing and heat exchanger pipes — engineered for performance across the world's most demanding industries.
2205 duplex stainless steel coiled tubing — combining austenitic and ferritic microstructure for superior corrosion resistance and strength in offshore and industrial environments.
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1/2 inch stainless steel coiled tubing available in 316L, 304, and 321 grades. Ideal for hydraulic systems, instrumentation lines, and precision fluid transfer applications.
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310 / 310S stainless steel coil tubes engineered for extreme heat environments. Used in furnace components, heat exchangers, and industrial boilers requiring oxidation resistance.
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We don't just manufacture tubing — we engineer solutions. Our commitment to quality, innovation, and customer satisfaction has made us a trusted partner for buyers in 30+ countries.
Our six fully equipped production lines enable high-volume output with consistent quality. From raw material sourcing to finished product, every step is controlled in-house for maximum efficiency and traceability.
All products are manufactured in strict accordance with GB, ASTM, ASME, JIS, and EN standards. We provide full documentation including Certificates of Analysis, Conformance, and Origin upon request.
We introduced world first-class bright annealing technology that enables online softening treatment of stainless steel pipe, ensuring superior surface quality, dimensional accuracy, and mechanical properties.
Every product undergoes comprehensive testing: 100% hardness testing, air tightness testing, flaring, bending, stretch testing, and dimensional inspection. Zero-defect delivery is our commitment.
Outer diameter from 0.125" (3.175mm) to 1" (25.4mm). Wall thickness up to 0.165" (3mm). Lengths up to 32,800 feet (10,000m). Custom dimensions available for special umbilical and industrial requirements.
With products exported to the US, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe, we understand international logistics, documentation, and compliance requirements.
We manufacture stainless steel coiled tubing and pipes in a broad range of alloy grades, from standard austenitic grades to high-performance super duplex and nickel alloys. Each grade is selected and processed to meet the specific mechanical, chemical, and temperature requirements of your application.
Beyond standard production, we offer a full suite of value-added processing services to deliver ready-to-use stainless steel components tailored to your exact specifications.
Supports 304, 316L, 2205 and more. Diameter 6.35mm–19mm for heat exchanger coils. Tailored to your drawing.
Bending, spiral forming, and precision drawing processes optimized for heat exchanger and coil tubing applications.
Laser cutting, mechanical cutting, and flame cutting for high-precision, burr-free material processing at scale.
Bright annealing, electropolishing, pickling, and passivation to meet the strictest hygiene and corrosion resistance requirements.
Precision flanging for automotive exhaust systems, chemical pipelines, and precision instrument connections.
As offshore environments demand extreme safety, we help you select the right corrosion-resistant material for coiled umbilical tubing — improving safety, reliability, and long-term performance. This mission drives our continuous R&D investment.
📋 Get a Custom QuoteOur stainless steel coiled tubing and pipes are trusted across the world's most demanding sectors — from deep-sea oil exploration to pharmaceutical cleanrooms and semiconductor fabrication.
Our manufacturing processes and products are certified to international standards, giving our global customers confidence in every order. We provide full documentation for customs, compliance, and quality assurance.
Liaocheng Sihe Stainless Steel Material Ltd holds multiple internationally recognized certifications that validate our manufacturing processes, product quality, and management systems. Our certifications cover quality management, material testing, product conformance, and export compliance — ensuring every shipment meets the highest global standards.
We can provide most documentation including Certificates of Analysis, Certificates of Conformance, Insurance, Origin certificates, and other export documents as required by your country's import regulations.
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Everything you need to know about ordering, pricing, shipping, and working with Liaocheng Sihe Stainless Steel Material Ltd.
Whether you need standard grades or special alloys, short runs or large-volume orders — our team is ready to provide expert guidance and competitive pricing. Trusted by buyers in 30+ countries.