Sihe Steel
Sihe Steel
Direct factory wholesale supplies complying with international standards including ASTM, ASME, EN, JIS, and GOST.
Years Manufacturing Experience
Advanced Production Lines
Max Continuous Length Coil
Export Countries & Regions
ASTM A269 is the benchmark standard specification governing nominal-wall-thickness, seamless, and welded austenitic steel tubing for general corrosion-resisting and low- or high-temperature service. Within this standard, Grade 310 (often utilized as Grade 310S or UNS S31008 for reduced carbon content) represents the absolute pinnacle of high-temperature austenitic alloy design.
Our engineering whitepaper explores why Grade 310 stainless steel is uniquely structured to combat intense heat, high pressures, and chemical corrosion. Grade 310's exceptional properties are due to its high chromium (24% to 26%) and nickel (19% to 22%) alloy composition. Under temperature extremes up to 2010°F (1100°C), this metallurgy produces a resilient, protective chromium oxide scale. This layer prevents further oxidation and resists carburizing, sulfidizing, and nitriding atmospheres. This makes ASTM A269 Grade 310 coiled tubing the ideal choice for thermal processing, petrochemical crackers, geothermal systems, and aerospace testing chambers.
To understand the high pricing and custom nature of ASTM A269 310 coils, engineers must evaluate the precise chemical elements that establish its structural integrity:
As a leading Chinese expert in stainless steel coiled tubing, Liaocheng sihe stainless steel material LTD operates six state-of-the-art production lines. We design, manufacture, and verify high-performance sheets and pipes, specializing in polished tubes, heat exchanger pipes, and ultra-long seamless coiled tubing. Our production adheres strictly to GB, ASTM, ASME, JIS, and EN standards.
We work with a variety of steel grades, including 304/304L, 316L, 321, 317L, 309S, 310S, INCOLOY 800, INCOLOY 825, and INCONEL 625, along with Duplex 2205 and Super Duplex 2507. With our deep metallurgical capability, we customize coiled tubing sizes ranging from 0.125 inches (3.175 mm) up to 1 inch (25.4 mm) in outer diameter, with wall thicknesses up to 0.165 inches (3 mm).
A key technological highlight is our online bright annealing system. Using hydrogen-nitrogen atmosphere protective furnaces, we carry out softening heat treatment inline. This ensures the coiled tubing exhibits uniform grain structure, clean inner and outer surfaces, and remains fully ductile. This inline treatment enables us to deliver single continuous lengths of up to 32,800 feet (10,000 meters) without orbital joint welds, significantly reducing pressure drop and leak points in critical oil, gas, and chemical lines.
Sourcing ASTM A269 310 stainless steel coiled tubes from Liaocheng Sihe Stainless Steel Material LTD offers global enterprise buyers significant cost, logistics, and quality advantages. By integrating raw material procurement directly with advanced tube-drawing facilities, we deliver exceptional value and short lead times.
We manage everything from selecting hot-rolled coils to cold drawing, pilgering, and testing. This process control ensures consistent mechanical properties, precise dimensions, and structural reliability.
Our processes are certified to European PED and ISO 9001 standards. We provide complete EN 10204 3.1 Material Test Reports (MTRs), PMI chemical verification, and non-destructive test certs.
We supply custom diameters, exact wall thicknesses, and special spool weights. Whether you need standard coils or heavy-duty subsea umbilicals, we customize products to meet your specifications.
Safety is critical in offshore engineering, chemical plants, and high-pressure instrument lines. Liaocheng Sihe ensures the reliability of our products by subjecting every batch of coiled tubing to rigorous non-destructive and destructive testing before dispatch:
Procuring ASTM A269 310 coiled tubing requires an understanding of raw material costs and manufacturing steps. Grade 310 is highly alloyed with 20% nickel and 25% chromium, making its pricing sensitive to London Metal Exchange (LME) nickel and chromium price fluctuations.
In addition to raw material indexes, several key factors influence pricing for custom coiled tubing quotes:
We work closely with global procurement teams to optimize costs. By establishing annual frame contracts, buyers can secure stable pricing, minimize LME market risk, and guarantee supply schedules.
ASTM A269 310 stainless steel coiled tubes are widely used across diverse industries. Their high-temperature properties make them key components in critical environments around the world.
In high-pressure subsea environments, our coiled tubing serves as control lines and chemical injection lines in deepwater umbilicals, where resistance to pitting and crevice corrosion is vital. In petrochemical processing plants, the high creep-rupture strength of 310S makes it suitable for cracking furnace piping, gasifier components, and waste heat boilers. In aerospace, these coils are used for fuel and sensor conduits under high temperatures.
Liaocheng Sihe Stainless Steel Material LTD provides a range of downstream processing services to prepare coiled tubes for immediate integration into your assemblies:
We work with various grades (304, 316L, 2205) and sizes from 6.35mm to 19mm OD, providing tailored configurations for industrial coils.
We offer specialized processing including precision bending, spiral coiling, structural forming, and custom drawing to meet specific heat exchanger designs.
We utilize laser, mechanical, or flame cutting tools to deliver precise lengths and straighten coiled tubing for automated machine systems.
Our custom end treatments, including flanging and precision shaping, are used in automotive exhausts, chemical pipelines, and instrument lines.
Our manufacturing processes conform to global standards, ensuring safety and performance in critical applications.
Over the past decade, Liaocheng Sihe Stainless Steel Material LTD has expanded its export capabilities. Today, 80% of our production is exported worldwide, supplying customers in over 30 countries, including the US, Germany, Spain, South America, Southeast Asia, the Middle East, and Eastern Europe.
As oil and gas extraction moves into deeper waters and harsher environments, safety and reliability become increasingly critical. Our primary objective is to help engineers select the correct corrosion-resistant materials for coiled umbilical tubes, helping to improve operational safety and reliability.
This objective drives our technical development and ongoing investments. We prioritize customer requirements and strive to provide suitable technical solutions for each project's specifications.
Get expert insights on procurement, pricing, capabilities, and technical specifications.
Duplex 2205 offers good resistance to localized corrosion and stress corrosion cracking.
Coiled tubing is available in various outer diameters for heat exchangers and hydraulic systems.
Specialized manufacturing of Grade 310 and 310S tubing for high-temperature service.
Welded coiled tubing options for chemical injection and general transport lines.
Precision capillary and hydraulic lines for aerospace and control instrumentation.
Corrosion-resistant grades suitable for deepwater subsea applications.
310S and nickel alloy grades designed for furnace tubes and boilers.
Polished finishes for pharmaceutical and semiconductor industries.
Complete wholesale portfolio featuring premium welded pipes, sheets, and heat exchanger tubing.
