UNS S31603/EN 1.4404/ASTM A269 TP316L Seamless Coiled Tubing

Toko Seamless Coiled Tubing

Shanghai Toko Tech Co., Ltd. is a professional supplier of special alloy pipes and components in China. The seamless coiled tubing provided by TOKO TECH is manufactured using advanced hot-rolled and cold-drawn technologies, featuring high dimensional accuracy, excellent surface finish, superior mechanical properties, and outstanding corrosion resistance. These coiled tubes are supplied in long, continuous lengths without welds, eliminating potential leakage points. They are ideally suited for critical applications requiring continuous bending or operation in high-pressure and highly corrosive environments.

Shanghai Toko Tech Co., Ltd.​ is a professional supplier of high-performance special alloy pipes and components. Among its core products, ​316L seamless coiled tubing​ stands out for its exceptional corrosion resistance and reliable performance in demanding applications.

​​Key Features & Advantages:​​

• ​​Superior Corrosion Resistance:​​ The high ​​Molybdenum​​ (Mo) content (typically 2-3%) significantly enhances resistance to pitting and crevice corrosion in chloride-ion environments, outperforming standard 304/316 grades.
• ​​Excellent Manufacturing Properties:​​ Exhibits good formability and weldability, facilitating easy installation and fabrication into complex systems.
• ​​Low Carbon Content (L-Grade):​​ The carbon content is controlled to a maximum of 0.03%, minimizing the risk of ​​sensitization​​ (chromium carbide precipitation) during welding, thereby maintaining its corrosion resistance in welded structures.
• ​​Seamless & Continuous Length:​​ The seamless structure ensures uniformity and higher pressure integrity, while the long coiled length eliminates potential leak points at welds and simplifies routing around obstacles.
• ​​High-Quality Surface Finish:​​ Produced through advanced cold drawing and bright annealing processes, resulting in a smooth surface that minimizes friction resistance and reduces the potential for fouling or contamination.

​​Typical Specifications (Customizable):​​

• ​​Material Grade:​​ UNS S31603 / EN 1.4404 / ASTM A269 TP316L
• ​​Outer Diameter (O.D.):​​ φ3.18 mm ~ φ4mm(1/8 inch ~ 1 inch)
• ​​Wall Thickness (W.T.):​​ 0.5 mm ~ 2.0 mm (02inch~0.083inch)
• ​​Coil Length:​​ 90-1000 metersper continuous coil (exact length depends on O.D. and W.T.)
• ​​Standard:​​ ASTMA213, A269, A312. ASME SA213, SA269, SA312. AMS 5507,5647. MIL-T 6736. BS 970 Pt. 4, BS EN 10216-5. DIN 17458

Seamless Coiled Tubing Standard Size Reference Chart

This chart lists our common outer diameters (O.D.) of coiled tubing and their corresponding standard wall thickness (W.T.) ranges, as well as typical single-coil lengths. ​

*The above lengths refer to the lengths of single – coil seamless pipes, not the total lengths of welded pipes. 

*The material is TP316/316L. The final lengths for different materials shall be subject to the official quotations.

*Specific available wall thicknesses and lengths may vary depending on the material and manufacturing process.

Manufacturing Process & Destructive

Toko TECH seamless coiled tubing is manufactured using advanced hot extrusion combined with cold working techniques, ensuring product uniformity and high performance. The main process flow is shown in the chart below:

• Hydrostatic Testing: a non-destructive test (NDT) for strength and leaks. The test involves filling the tubing with

deionized water until it reaches a specified hold pressure. The tubing is then observed for leaks and pressure loss.

• Splitflow Testing: a non-destructive test (NDT) used on small diameter tubing to ensure that the interior is free

of blockages and the surface is free of leaks. Testing involves holding a tube underwater and flowing Nitrogen

through the tube.

• Eddy Current Testing: eddy current testing (ECT) is one of many non-destructive electromagnetic (NDE) testing

methods. ECT makes use of electromagnetic induction to detect and characterize surface and sub-surface flaws

in tubing.

• Surface Roughness:smoothness of the OD or ID surface of the tubing. Measurements are taken by a Surfometer

verified against certified roughness standards.

• Dimensional Analysis: a measurement of the OD, ID, and/or Wall Thickness of the tube using a variety of

calibrated micrometers and gauge pins.

• Hydraulic Diameter: measure of the cross-sectional fluid flow through the inner diameter of the tube. Hydraulic

diameter is obtained through a back pressure flow test.

• Positive Material Identification (PMI): the analysis of a metallic sample to identify the material grade. This is ac

complished by measuring the % composition of its constituent elements and matching it to a database of known

alloys. Typical methods for PMI include X-ray fluorescence (XRF).

• Yield Strength: the stress at which a specific amount of plastic deformation is produced, usually taken as 0.2

percent of the unstressed length.

• Tensile Strength: a measurement of the force required to pull something to the point where it breaks. The tensile

strength of a material is the maximum amount of tensile stress that it can take before failure.

• Elongation: a measure of the ductility; the amount of strain deformation a material can experience before failure

in tensile testing.

• Grain Size:a measure of the density of metallic crystals with the same configuration within the microstructure of

a material. Grain size serves as an indicator of temper within a sample of material.

• Rockwell Hardness:a hardness scale based on indentation hardness of a material. The Rockwell test determines

the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetra

tion made by a preload.

​​

Primary Applications:​​

This tubing is ideal for critical services across various industries, including:

• ​​Chemical & Petrochemical Processing:​​ Transfer lines for corrosive media, instrument lines, sample lines.
• ​​Oil & Gas:​​ Chemical injection lines (e.g., methanol, inhibitors), hydraulic control lines, instrument tubing on offshore platforms.
• ​​Pharmaceutical & Food Processing:​​ High-purity fluid transfer lines where cleanliness and corrosion resistance are paramount.
• ​​Marine & Shipbuilding:​​ Systems exposed to saltwater environments.
• ​​General Industrial:​​ Heat exchangers, pressure gauges, and other equipment requiring reliable corrosion-resistant tubing.

​​Why Choose TOKO TECH’s 316L Coiled Tubing?​​

TOKO TECH ensures product quality through strict control from material selection to final packaging, often including ​​100% eddy current testing (ET)​​ and ​​hydrostatic/pneumatic testing​​. The coils are typically protected by ​​VCI (Vapor Corrosion Inhibitor) packaging​​ or ​​vacuum sealing​​ to prevent corrosion during transit and storage.

In summary, TOKO TECH’s 316L seamless coiled tubing offers a robust combination of ​​excellent corrosion resistance, design flexibility from coiled form, and reliable performance​​, making it a trusted choice for engineers designing systems for harsh operating conditions.