Sihe Steel
Sihe Steel
High-precision stainless steel fluid transmission lines manufactured under strict international standards.
Precision-manufactured seamless heat exchanger pipes designed for high-temperature and corrosive processes. Factory direct pricelist available.
Efficient thermal transfer cooling coils, custom coiled for commercial refrigeration, process cooling, and condensation modules.
Micro-bore capillary tubing perfect for chromatography, analytical instruments, and high-precision hydraulic control lines.
Wear-resistant martensitic stainless steel sheets with hairline finishes, suitable for structural applications requiring moderate corrosion resistance.
High-alloyed corrosion-resistant stainless steel coil rolls for automotive, stamping, and manufacturing components.
High-quality surface finish polished tubes, engineered for structural, decorative, and architectural hardware applications.
Exceptional yield strength and superior resistance to chloride-induced stress corrosion cracking in aggressive chemical fields.
Precision engineered shell-and-tube or coiled cooling heat exchangers designed for optimal thermal efficiency and longevity.
Engineering analysis, metallurgy characteristics, and structural specifications of long-run seamless coiled pipelines.
The ASTM A269 specification covers nominal-wall-thickness, seamless, and welded austenitic steel tubing for general corrosion-resisting and low- or high-temperature service. ASTM A269 TP316 (and its low-carbon counterpart TP316L) is widely recognized as the industry benchmark for liquid and gas distribution systems where aggressive chemical exposure is expected.
By incorporating 2% to 3% Molybdenum, the austenitic matrix of 316 grade steel offers dramatically increased resistance to localized pitting and crevice corrosion, especially in high-chloride marine environments. The low-carbon profile of 316L (carbon content restricted to ≤ 0.030%) prevents carbide precipitation during welding operations, securing the grain structure against intergranular corrosion.
Our coiled tubes are engineered to withstand extreme pressures and tight bending radiuses without deformation or micro-fractures. Review the operational boundaries and raw chemical parameters detailed in the reference table below:
| Specification Element | ASTM A269 TP316 Standard | ASTM A269 TP316L Standard | Sihe Group Delivery Range |
|---|---|---|---|
| Chromium (Cr) % | 16.0 - 18.0 | 16.0 - 18.0 | Guaranteed 17.0+ for premium corrosion resistance |
| Nickel (Ni) % | 10.0 - 14.0 | 10.0 - 14.0 | 10.5 - 12.0 optimized phase balance |
| Molybdenum (Mo) % | 2.00 - 3.00 | 2.00 - 3.00 | 2.10 - 2.50 for elevated marine reliability |
| Carbon (C) % max | 0.08 | 0.030 | ≤ 0.025 (Ultra-low carbon processing) |
| Outer Diameter (OD) | 0.125" - 1" | 0.125" - 1" | 0.125 inch (3.175mm) to 1 inch (25.4mm) |
| Wall Thickness | Up to 0.165" | Up to 0.165" | 0.020" to 0.165" (0.5mm to 3.0mm) |
| Continuous Length | Custom | Custom | Up to 32,800 feet (10,000 meters) joint-free |
Analyzing how ASTM A269 316 coiled pipes are adapted to extreme operating conditions globally and locally.
In offshore fields like the North Sea and the Gulf of Mexico, extreme marine pressures demand high-tensile, corrosion-resistant lines. Our super-long, weld-free coiled pipes (up to 10,000 meters) are integrated into subsea control umbilicals, chemical injection lines, and downhole safety valve control loops, minimizing the risk of deepwater environmental incidents.
In high-purity microchip fabrication facilities in East Asia and bio-pharma hubs in Western Europe, gas delivery lines must not contaminate the process. Using advanced bright annealing, the inner surface of our ASTM A269 316 tubing is kept completely clean, smooth, and free of oxides, maintaining structural integrity and gas purity.
Aerospace hydraulic systems rely on lightweight, high-yield strength tubing. Operating under extreme pressure fluctuations and temperature drops, our cold-drawn seamless coiled pipes minimize vibration cracking, providing reliable fuel and hydraulic lines in aircraft and spacecraft systems.
Every industrial region has different requirements. We customize our ASTM A269 316 coiled pipes to meet regional environmental regulations: CRA (Corrosion Resistant Alloy) specifications for saline Middle Eastern coastal installations, strict FDA compliance for food-grade lines in North America, and AD2000-W2 pressure vessel guidelines for German chemical processing hubs.
Our production capabilities, international exports, and quality commitment.
Based in Liaocheng, Shandong Province, Liaocheng Sihe Stainless Steel Material LTD has manufactured high-quality stainless steel sheet and pipe products for over ten years. Operating six production lines, we have integrated our operations with nearby premium raw steel suppliers. This enables us to maintain a stable inventory of high-grade raw materials (including 304/304L, 316L, 321, 317L, 309S, 310S, and Incoloy 800) even during global market fluctuations.
Our production advantage is built on several key factors:
Innovating metallurgical structures to handle higher temperatures, deeper waters, and more corrosive environments.
While standard ASTM A269 TP316 remains the workhorse of process industries, extreme conditions require specialized alternatives. Our technical team is leading the transition toward duplex and super-alloy coiled structures. In ultra-deep offshore systems, pressure and salinity demand higher material performance. To meet this, we have developed coiled lines using Duplex 2205, Super Duplex 2507, Incoloy 825, and Inconel 625.
Our metallurgy research focuses on reducing micro-segregation in weld zones and controlling nickel content, allowing us to supply coiled tubing with high yield strengths and reliable pitting resistance equivalent (PREN) scores.
To support next-generation subsea systems and smart chemical plants, our QA systems are being upgraded with digital monitoring technologies. We are integrating continuous laser dimensional scanning and inline eddy current mapping. This creates a digital passport for every shipped coil, showing exact wall thickness consistency and wall integrity across lengths up to 10,000 meters. This transparency helps engineering contractors design safer systems and lowers overall project risk.
We support various custom processing options, bending techniques, and high-performance applications.
We support various materials (including 304, 316L, 2205) and custom specifications, with diameters ranging from 6.35mm to 19mm for stainless steel coils.
Includes bending, spiral forming, precision drawing, and other processes customized for heat exchangers.
Laser cutting, mechanical cutting, and flame cutting options for high-precision and efficient material processing.
We develop high-performance surface finishes using state-of-the-art bright annealing technologies.
Typically used for connections in automotive exhaust systems, chemical pipelines, and precision instruments.
Explore our processing capabilities, custom forming, and coiled tubing options.
2205 duplex stainless steel containing austenitic and ferritic phases, offering excellent resistance to cracking and corrosion.
Standard sizing for fluid transfer systems, instrument control lines, and industrial cooling setups.
High-temperature grade stainless steel coiled tubes, manufactured in China for high-heat industrial systems.
Custom dimensions available on request.
Every batch is tested to meet international standards (ISO, CE, ASTM, and ASME).
Clear, helpful answers regarding our ASTM A269 316 coiled pipes, custom processing, and shipping terms.
We offer various grades of stainless steel sheets, duplex tubes, and custom cooling coils.
Polished Grade 202 stainless steel tubes, manufactured in China. Offers a cost-effective solution for structural and indoor applications.
High-strength duplex steel tubing designed for high-stress, corrosive offshore applications. Direct from manufacturer.
Versatile 304 seamless coiled tubing. Ideal for chemical transport, heating elements, and beverage lines.
High-grade cold-rolled sheets with tight thickness tolerances. Suitable for industrial structural fabrication.
Premium low-carbon coiled tubing designed to prevent carbide precipitation during welding and assembly.
Food-grade polished coils designed for draft beer cooling systems and food-safe beverage processing.
Exceptional resistance to reducing and oxidizing acids, stress-corrosion cracking, and localized pitting.
High-alloy austenitic stainless steel tubing designed for high-corrosion environments like sulfuric acid processing.
