Sihe Steel
Sihe Steel
Explore our high-performance ASTM, DIN, and JIS-compliant stainless steel piping manufactured for extreme reliability.
Understanding the metallurgical properties of 304 and 304L stainless steels for extreme industrial applications.
In modern engineering, the choice of piping material dictates the life-cycle cost, safety parameters, and overall integrity of pressure systems. Standard 304 Stainless Steel (UNS S30400) remains the global benchmark for corrosion resistance, mechanical strength, and weldability. Characterized by its 18% chromium and 8% nickel composition, it establishes an instantaneous passive chromium oxide layer that protects the underlying metal from corrosive media.
However, when welding is part of the manufacturing process, carbon precipitation can lead to sensitization at the grain boundaries, which can cause intergranular corrosion. This is where 304L Stainless Steel (UNS S30403) is utilized. With its carbon content restricted to a maximum of 0.03%, 304L prevents sensitization, making it suitable for heavy welded structures in highly corrosive environments like chemical reactors, aerospace tubing, and marine installations.
We manufacture strictly according to global technical specifications, ensuring compliance with pressure vessel codes and dimensional tolerances:
Sourcing directly from Shandong Liaocheng provides structural cost benefits, technical capabilities, and supply chain control.
Liaocheng is an established global hub for precision steel tubes. The local concentration of raw materials, smelting services, and logistics networks keeps overhead costs low while maintaining fast production cycles.
We use a specialized bright annealing technique under controlled atmospheres. This thermal treatment softens the stainless steel, restores ductility, and prevents surface oxidation, keeping the inside and outside diameters clean and scale-free.
Every batch undergoes testing to ensure chemical compliance. We perform hydrostatic tests, air-tightness tests, tensile trials, flaring evaluations, and 100% hardness verifications before shipping.
A B2B manufacturer delivering high-grade stainless steel products for demanding global projects.
Liaocheng Sihe Stainless Steel Material LTD is a manufacturer of stainless steel coiled tubes, stainless steel polishing tubes, and seamless/welded piping. Our production processes align with international standards, including GB, ASTM, ASME, JIS, and EN, ensuring reliability for critical infrastructure.
We offer a broad range of steel grades to meet various chemical resistance, mechanical stress, and thermal requirements. In addition to 304/304L, we manufacture in:
Our technical specialty includes continuous coiled tubing. We produce custom lengths up to 32,800 feet (10,000 meters) without orbital butt welds. This design reduces leak paths, which is critical for subsea umbilicals, downhole chemical injection lines, and high-purity semiconductor gas delivery systems.
Our outer diameter (OD) sizes range from 0.125 inches (3.175 mm) to 1 inch (25.4 mm), with wall thicknesses up to 0.165 inches (3 mm). This allows us to supply precise specifications for diverse industrial applications.
We provide tailormade post-production processes to streamline integration into your local assembly lines.
We support various materials (including 304, 316L, and Duplex 2205) and custom specifications ranging from 6.35 mm to 19 mm, tailored to client blueprints and specifications.
Our techniques include precision bending, spiral forming, and custom drawing, creating configurations for heat exchangers, condenser coils, and chemical apparatus.
We offer laser, mechanical, and flame cutting. These processes provide precise tolerances and clean, burr-free ends for seamless welding and fitting.
We develop products using state-of-the-art finish technologies. Options include mechanical polishing, acid pickling, and passivating for sanitary and high-purity environments.
Our flanging capabilities support secure, leak-proof connections. They are used in automotive exhaust networks, chemical transfer lines, and precision instruments.
We supply long continuous lengths for subsea hydraulic controls, downhole chemical dosing, and geothermal systems, minimizing orbital butt welds.
Our products perform in demanding thermal, high-pressure, and chemical environments worldwide.
Corrosion-resistant tubing designed for efficient thermal transfer in power generation and petrochemical systems.
Reliable tubing for heat pump and chiller networks, resisting structural fatigue from temperature fluctuations.
Piping engineered to withstand acids, bases, and high operating pressures in processing systems.
Sanitary-grade 304 and 316L tubing with smooth internal surfaces to prevent bacterial buildup and product contamination.
High-purity capillary tubing supporting contamination-free fluid transfer in pharmaceutical systems.
Super-heated steam piping and turbine feedlines engineered for mechanical strength under high temperatures.
Corrosion-resistant tubing designed to handle sour gas and crude oil fractions in refining environments.
Lightweight, high-strength tubing for fuel injection lines, hydraulic systems, and exhaust networks.
B2B buyer considerations: Managing risk, ensuring compliance, and optimizing shipping in stainless steel markets.
For global procurement managers, purchasing industrial piping involves evaluating several operational variables. Sourcing directly from a Chinese factory with integrated processing capabilities offers several advantages:
The global stainless steel industry is shifting toward lower carbon footprints and higher efficiency alloys. Our R&D processes focus on two key areas:
1. Lowering Carbon Emissions: We utilize electric arc furnace (EAF) recycling loops and gas-reclaiming bright annealing systems to reduce the environmental footprint of our products. This supports compliance with global carbon reduction targets, such as the EU's Carbon Border Adjustment Mechanism (CBAM).
2. High-Alloy Performance: Demand for materials like Duplex 2205 and Super Duplex 2507 is growing in deep-water oil extraction and carbon capture systems. These alloys offer high tensile strength and localized corrosion resistance (pitting resistance equivalent number, PREN > 40).
Our manufacturing and quality systems undergo audits to verify compliance with global B2B procurement standards.
Review our specialized categories, dimensions, and alloy materials.
2205 duplex stainless steel combines austenitic and ferritic properties. It provides corrosion resistance and high yield strength for marine and chemical systems.
Our 1/2-inch stainless steel coiled tubing is designed for high-pressure control lines, hydraulic lines, and fluid sampling setups.
Liaocheng Sihe manufactures 310S grade coils. This high-temperature material resists oxidation in heat exchangers, industrial furnaces, and thermal processors.
Continuous length tubing solutions designed to reduce connection points in subsea umbilicals and petrochemical injection lines.
High-precision, micro-diameter tubing manufactured for chromatography, pharmaceutical fluidics, and measurement systems.
Thermal transfer tubing options, available in straight or U-bent configurations for condensers and boilers.
Industrial structural materials available in various thicknesses, cold or hot-rolled, for pressure vessel cladding and tank construction.
High-finish, corrosion-resistant surface sheets suited for architectural applications, sanitary cladding, and food prep areas.
Corrosion-resistant custom configurations using Nickel 825, Inconel 625, and Super Duplex alloys for harsh chemical services.
Get answers to common B2B procurement queries regarding pricing, lead times, materials, and shipping logistics.
Our prices are subject to change depending on material supply, energy costs, exchange rates, and other market factors. Once your company contacts us, we will send you an updated price list and custom quotes based on your specific requirements (material grade, wall thickness, dimensions, and purchase volume).
Yes, we require all international orders to meet a minimum order quantity to ensure production efficiency and cost control. MOQs vary by material grade and size. If you are a distributor or need smaller quantities, contact our sales department to discuss sample options and customized runs.
Yes, we provide quality and compliance documentation, including Mill Test Certificates (MTR) according to EN 10204 3.1, Certificate of Conformance, Insurance Certificates, Certificate of Origin, and export documentation required for customs clearance in your region.
For prototype samples, the lead time is about 7 days. For mass production, lead times range from 20 to 30 days after receiving your deposit and final drawing approvals. If you face tight project deadlines, contact our logistics representatives to coordinate expedited scheduling.
We accept wire transfer (T/T), Western Union, and PayPal. Our standard commercial terms are a 30% deposit in advance, with the remaining 70% balance payable against the copy of the Bill of Lading (B/L) or under Letter of Credit (L/C) agreements.
We warranty our materials and workmanship. Our goal is customer satisfaction. Whether within the warranty period or after, our engineering team works with clients to address and resolve any technical issues or product claims.
Yes, we use export packaging, including heavy-duty wooden crates, plastic caps for pipe ends, and corrosion-inhibiting wraps. We also implement specialized packing for heavy coiled tubing and dangerous goods. Non-standard or custom packing requirements can be accommodated upon request.
Shipping costs depend on the delivery method, shipment weight, dimensions, and destination country. Air express is the fastest but most expensive, while sea freight is typically the most cost-effective option for large bulk orders. We provide transparent freight estimates once you supply order details.
Browse our selection of specialized industrial tubing, capillary systems, and cold-rolled sheets.
