Sihe Steel
Sihe Steel
Engineered to excel in high-pressure hydraulic and corrosive process environments across the Indian subcontinent.
Precision-drawn seamless tubing conforming strictly to ASTM A269 standards. Ideal for Indian refinery instrumentation lines.
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Engineered for chemical process piping. Excellent resistance to localized pitting and crevice corrosion under high humidity.
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Ultra-low carbon 316L stainless steel tubing designed to eliminate carbide precipitation during welding in manufacturing environments.
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High-integrity continuous coiled control lines designed for subsea oil and gas extraction systems off the Indian coast.
View DetailsIn high-precision industrial operations, capillary tubing acts as the primary conduit for critical process control, hydraulic actuation, and chromatographic sampling. Choosing the correct grade and manufacturing tolerance is crucial. 316 stainless steel capillary tubing is the gold standard for corrosive, high-pressure, and high-temperature environments. Standard 304 stainless steel fails when chloride ions trigger local pitting. In contrast, Grade 316 relies on its 2.0% to 3.0% Molybdenum (Mo) content to maintain structural integrity in challenging environments.
Our manufacturing processes at Liaocheng Sihe Stainless Steel Material LTD utilize state-of-the-art cold drawing and cold rolling (pilgering) technologies. Precision drawing steps determine the final outer diameter (OD) and wall thickness (WT) of the capillary tube. Because internal surfaces are exposed to sensitive chemical reactions and high pressures, they must be free from micro-fissures, die marks, and oil residues. This is why we employ advanced Bright Annealing (BA) technology. This processing step heats the tubing in a controlled hydrogen/nitrogen atmosphere to temperatures up to 1050°C, followed by rapid cooling. The protective gas prevents oxygen exposure, creating a mirror-like interior and exterior finish that enhances corrosion resistance and reduces fluid friction.
| Parameters | Standard Specification (ASTM A269) | Liaocheng Sihe Capability | India Operational Benefits |
|---|---|---|---|
| Outer Diameter (OD) | 0.125" to 1" (3.175mm to 25.4mm) | 0.03" to 1.5" (0.76mm to 38.1mm) | Fits diverse, compact instrument ports |
| Wall Thickness (WT) | 0.010" to 0.165" (0.25mm to 4.19mm) | Up to 3.0 mm (Customizable) | Handles pressures up to 10,000 PSI safely |
| Coil Length | Standard mill coils | Up to 32,800 feet (10,000 meters) orbital jointless | Fewer fittings, zero leaks in offshore umbilicals |
| Carbon Content (316L) | ≤ 0.035% max | ≤ 0.030% max guaranteed | Superior corrosion resistance post-welding |
| Tensile Strength | ≥ 485 MPa | ≥ 515 MPa | Resists vibration and mechanical shock |
Global engineering expertise combined with precision Chinese manufacturing pipelines.
Established with a focus on high-integrity alloy tubing, Liaocheng Sihe Stainless Steel Material LTD operates six modern production lines specializing in stainless steel coiled tubes, capillary tubes, and heat exchanger pipes. We manufacture products to international standards: GB, ASTM, ASME, JIS, and EN. We carefully verify our output against industry specifications, using grades like 304/304L, 316L, 321, 317L, 309S, 310S, and INCOLOY 800.
Our metallurgy expertise extends to specialized materials: Austenitic 316L, Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625. These alloys are designed for high-stress applications in military logistics, semiconductor fabrication, pharmaceutical biotech, offshore oil exploration, and high-temp boiler exchangers. Our long continuous coils (up to 10,000 meters) minimize potential leak points in umbilical manufacturing, providing a safe, reliable path for hydraulic power.
We believe material validation is essential. Every meter of our 316 stainless steel capillary tubing undergoes strict testing prior to packaging and dispatch. Our internal testing procedures include:
Our online bright annealing technology preserves surface finish, protecting the passive chromium oxide film that prevents rust in humid, saline industrial environments.
India is undergoing rapid industrial expansion driven by the "Make in India" initiative. Major sectors—including refining in Gujarat, chemical manufacturing in Maharashtra, and pharmaceuticals in Telangana—rely on high-precision fluid transmission components. High-quality 316 stainless steel capillary tubing is essential for these demanding production environments.
From Gujarat (Jamnagar, Dahej) to Odisha (Paradip), mega-refineries require instrumentation lines that resist high temperatures, sulfur compounds, and sour gas. Our seamless 316L capillary tubes perform reliably in these harsh conditions.
In Hyderabad (Genome Valley) and Pune, hygienic manufacturing requires ultra-smooth internal surfaces. Our bright annealed capillary tubes prevent product adhesion and bacterial contamination in cleanrooms.
In the Krishna-Godavari Basin and coastal desalination plants, chloride pitting is a constant challenge. Our Molybdenum-alloyed 316 stainless steel resists brackish water and marine atmospheres.
Sihe Steel meets these requirements by offering tailored logistics and custom length packaging to industrial zones across India. We supply directly to major hubs including Mumbai, Chennai, Visakhapatnam, Kolkata, and New Delhi, ensuring that our products support India's national infrastructure growth.
Procuring raw materials for high-precision tubing requires an understanding of the cost drivers. Pricelist volatility is rarely linear; it shifts based on material chemistry, processing precision, and global supply chains. At Liaocheng Sihe, we maintain a transparent, value-oriented pricing structure based on several key factors:
Looking to calculate FOB, CFR, or CIF prices to Chennai, Nhava Sheva, Mundra, or Haldia ports? We provide customized pricing based on your volume requirements and testing specifications.
Get Updated PricelistValue-added processes tailored to meet complex industrial requirements.
We support various materials (including 304, 316L, 2205) and outer diameters from 6.35mm to 19mm for coiled stainless steel tubing.
Includes high-precision bending, spiral forming, and precision drawing, designed for heat exchangers and high-pressure steam loops.
We offer high-precision laser cutting and mechanical shearing to deliver burr-free, straightened capillary tubes ready for assembly.
We offer chemical passivation, electro-polishing, and advanced bright annealing to improve surface performance and cleanroom suitability.
Standard flanged and flared tube ends designed for leak-free connections in automotive exhaust systems, chemical pipelines, and instrumentation ports.
Comprehensive hydrostatic, pneumatic, and eddy current testing to verify integrity and pressure containment before shipment.
Where Sihe Steel tubing meets critical operational demands.
Highly thermal-conductive, thin-walled tubing arrays that resist vibration fatigue and chemical stress corrosion cracking.
Precision capillary loops for refrigerants, designed for structural flexibility and leak prevention under continuous thermal cycling.
Corrosion-resistant tubing designed to handle aggressive acids and organic catalysts under high system pressures.
Hygienic, bright annealed tubing lines that prevent bacterial colonization and resist aggressive clean-in-place (CIP) chemicals.
Ultra-pure inner diameters designed to prevent contamination in medical formulation and batch routing processes.
Heavy-walled, high-temperature hydraulic line tubing designed for superheaters, steam turbines, and coal-gasification systems.
Corrosion-resistant tubing designed to handle sour gas and amine solutions in catalytic cracking and gas treating plants.
High-strength capillary tubes for critical braking, fuel injection, and hydraulic actuator systems.
Tested and verified by global third-party inspection agencies.
Detailed technical and commercial answers for engineering procurement teams.
Our prices are subject to change depending on supply, raw material cost (Molybdenum/Nickel index), and other market factors. We will send you an updated, project-specific price list after your company contacts us with detailed specifications (OD, wall thickness, and total length).
Yes, we require all international orders to have an ongoing minimum order quantity. For specific standard sizes, we can combine orders to offer flexibility. If you are looking to resell in smaller quantities, please contact us for distribution partners.
Yes, we can provide comprehensive documentation including Certificates of Analysis (COA), Mill Test Certificates (MTC to EN 10204 3.1/3.2), Certificate of Conformance, Insurance, Origin Documents, and other custom export documents required by Indian ports.
For samples and stock items, the lead time is about 7 days. For mass production of custom coiled or capillary lines, the average lead time is 20-30 days after receiving the deposit payment. Lead times become effective when we receive your deposit and final approval for product drawings.
You can make the payment to our bank account, Western Union, or PayPal. Our standard terms are a 30% deposit in advance, with the 70% balance payable against the copy of the Bill of Lading (B/L).
We warranty our materials and workmanship. Our commitment is to ensure client satisfaction. Whether within the warranty period or not, our company culture is to resolve all customer issues to everyone's satisfaction.
Yes, we always use high-quality export packaging, including heavy-duty wooden boxes, plastic wrapping, and steel frames to prevent coil deformation. We also utilize specialized hazard packaging for hazardous goods and temperature-controlled containers where required.
Shipping costs depend on the delivery method you choose. Ocean freight is the most cost-effective solution for large volumes. Express air freight is faster but more expensive. We can provide exact freight rates once we know your order weight, volume, and destination port.
Explore our full range of stainless steel products.
Duplex 2205 and austenitic grade options designed to minimize mechanical joints in high-pressure fluid networks.
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1/2" and other outer diameter options, suitable for process instrumentation and control applications.
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High-temperature oxidation-resistant steel coils designed for heat exchangers and furnace line environments.
View CategorySourced and certified to meet challenging industrial demands.
Precision 316L capillary lines featuring clean internal diameters, suitable for high-precision analytical instruments.
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Commonly specified 1/8" OD tubing designed for high-pressure control lines and instrumentation loops.
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Medical-grade capillary tubing featuring strict tolerance control and clean surfaces, suitable for surgical instrumentation.
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Martensitic stainless steel sheets offering good corrosion resistance and high mechanical strength.
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Heavy-duty seamless utility tubes designed for fluid transport in municipal power and water supply systems.
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Nickel-Iron-Chromium alloy pipes designed to resist chloride-induced stress corrosion cracking.
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Outer-sheathed encapsulated lines designed to protect internal control capillaries in downhole environments.
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Specialized capillary sizes designed for laboratory research, gas chromatography, and pilot chemical loops.
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Mechanically polished interior and exterior tubing designed to meet hygienic food and beverage standards.
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Duplex stainless steel tubing providing high mechanical strength and resistance to concentrated chloride solutions.
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Thick, heat-resistant alloy sheets designed for structural components in thermal treatment furnaces.
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Heavy welded industrial pipes manufactured to German DIN standards, suitable for coastal refinery wastewater systems.
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