Umbilical Seamless Capillary Coiled Tubing Super Duplex Stainless 2507

Product Details:
Place of Origin: China
Brand Name: MEILONG
Certification: ISO9001:2015, PED 97/23/EC
Model Number: 3/8'' OD x 0.065'' WT
Payment & Shipping Terms:
Minimum Order Quantity: 10000 feet
Price: Negotiable
Packaging Details: Level wound coiled on wooden spool, and wooden case packing
Delivery Time: 10 days (for our required MOQ)
Payment Terms: L/C, T/T
Supply Ability: 150000 meters per month

Detail Information

Material: Super Duplex 2507 Comply With NACE MR0175/ISO15156 Tube Type: Seamless
Condition: Bright Annealed Length: Up To 10000 Meters Long Per Reel
Qualification: Hydrostatic Tested Application: Oil And Gas Fields
Surface: Metallic Bright Specialty: High-pressure Hydraulic
High Light:

annealed stainless steel tubing


seamless hydraulic tubing

Product Description

Umbilical Seamless Stainless Steel Coil Tubing Super Duplex Stainless 2507


Super Duplex Stainless 2507, Chemical composition

Element Composition, %
Chromium 24.0-26.0
Nickel 6.0-8.0
Molybdenum 3.0-5.0
Manganese 1.2 max.
Silicon 0.8 max.
Carbon 0.030 max.
Sulfur 0.020 max.
Phosphorous 0.035 max.
Nitrogen 0.24-0.32

Application: Super duplex alloy combining excellent strength with good corrosion resistance in high chloride and seawater environments

Tensile strength, min.: 116ksi (800MPa)

Yield strength, min.: 80ksi (550MPa)

Elongation in 2 in., min.: 15%

Hardness, max.: Brinell 310, or Rockwell C 32


A value offer for your umbilical tube challenges

The offshore industry is facing new challenges with tougher operating conditions that are significantly impacting the performance of the umbilical. Subsea umbilical systems for deep and ultra-deep offshore projects are more and more demanding regarding injection capacities, number of functionalities, power requirements and increased tie-back lengths.


  • MEILONG umbilical tubes have been designed to increase the reliability and performances of your umbilical systems while ensuring the safety, flexibility and cost-effectiveness of your projects.
  • Yours operations are safe and reliable at higher temperatures and pressure levels, with superior benefits.
  • MEILONG tubes for umbilicals open new perspectives and capabilities for ultra-deep water projects.

Quality Assurance

Non Destructive Tests:


Eddy Current

Surface Roughness

Dimensional Analysis


Destructive Tests:

Yield Strength

Tensile Strength


Positive Material Identification (PMI)

Grain Size

Rockwell Hardness


MEILONG has been supplying the world’s best coiled tubes up to 3,234 lbs (1,467 kgs) and 14,764 ft (4500 mtrs) length without orbital butt welding.


Bright annealing treated, our coiled tubes are excellent in both internal and external surface quality.


Our coiled tubes are specially used in oil and gas industry requiring a higher level of reliability.


All the products are performed and delivered after ECT as well as hydrostatic & ovality test satisfying ASTM standards.


Available size and alloy materials

Materials Imperial Size Metric Size










Duplex 2205

Super Duplex 2506

Incoloy 825

Inconel 625

1/8 0.125 0.028 3.18 0.71
1/8 0.125 0.035 3.18 0.89
1/4 0.250 0.035 6.35 0.89
1/4 0.250 0.049 6.35 1.24
1/4 0.250 0.065 6.35 1.65
3/8 0.375 0.035 9.53 0.89
3/8 0.375 0.049 9.53 1.24
3/8 0.375 0.065 9.53 1.65
3/8 0.375 0.083 9.53 2.11
1/2 0.500 0.049 12.70 1.24
1/2 0.500 0.065 12.70 1.65
1/2 0.500 0.083 12.70 2.11
5/8 0.625 0.049 15.88 1.24
5/8 0.265 0.065 15.88 1.65
5/8 0.625 0.083 15.88 2.11
3/4 0.750 0.049 19.05 1.24
3/4 0.750 0.065 19.05 1.65
3/4 0.750 0.083 19.05 2.11



Production Process

Welded & Redrawn Tubing

Strip splice welds join lengths of cold rolled strip to enable long lengths between orbital welds (greater than 14,500 ft between orbital welds is achievable). The strip is formed into a tubular cross section and longitudinally seam welded using the gas tungsten arc (GTAW) process. The tubing is first sunk to an intermediate outside diameter, heat treated, and make the same process to obtain the desired size.


Seamless & Redrawn Tubing

Seamless extruded tube hollows are drawn or drawn / sunk to final size to produce seamless tubing coils 500 to 2,000 ft. long, depending upon the size. The tubing is heat treated and joined by orbital welding to achieve the desired length. The final material condition of the tubing is heat treated.


Super Duplex Stainless 2507 material provides excellent corrosion resistance in chloride-containing environments.

All Super Duplex Stainless 2507 control line tubing offered by MEILONG are made from a controlled-chemistry. Super Duplex Stainless 2507 material with minimum pitting resistance equivalent (PRE) value of 42.5

Size include 1/4’’, 3/8’’, 1/2’’, 5/8’’, 3/4’’, and 1 in. outside diameter.

Tubing nominal wall thickness meets ASTM A-789

Tube markings include size, material type/grade, specification, heat number, and other information.



Oil and Gas: Subsea

Sub-Surface Safety Valves (SSSV) / Umbilicals: Tubes filled with Hydraulic Fluid which run from floating platform or FPSO to the well head on the sea floor.


Oil and Gas: Downhole

Downhole Control Lines: Tubes running from above ground surface controls into a downhole well to the location of the well’s safety valve.



Calcite Inhibition System: Carries chemicals into earth’s crust to flash point of water in a geothermal well; injected to break down calcite deposits and extend life of the well.



Common connection tubing for control panels, pneumatic equipment, and fluid lines.


Norm Equivalence

Grade UNS No Euro norm Japanese
No Name JIS
Alloy ASTM/ASME EN10216-5 EN10216-5 JIS G3463
316L S31603 1.4404, 1.4435 X2CrNiMo17-12-2 SUS316LTB
2205 S31803 1.4462 X2CrNiMoN22-5-3 SUS329J3LTB
2507 S32750 1.4410 X2CrNiMoN25-7-4  
625 N06625 2.4856 NiCr22Mo9Nb  
825 N08825 2.4858 NiCr21Mo  



Since 1999, Meilong Tube Co., Ltd. has produced long coils of stainless steel and high nickel alloy tubing for numerous oil and gas applications, including hydraulic power, monitoring and control equipment, instrumentation, injection lines, down-hole safety valve control, subsea umbilical applications. Unique manufacturing capabilities and processes allow Meilong to produce the longest continuous length control line tubing available in stainless steels and high nickel alloys.


Our coiled tubing is available in a number of high performance corrosion resistant stainless steels and high nickel alloys, including 300 series, Incoloy, Inconel, capable of withstanding a variety of severe environmental conditions.


We specialize in manufacturing small diameter tubing ranging from 0.125 inch to 1 inch outside diameter (3.18mm to 25.4 mm) and a variety of wall thickness. All tubing is level wound coiled on various size spools, and products are tested and evaluated for specific applications before delivery. Our engineering staff welcome the opportunity to work with customers to solve special problems.


Meilong’s seamless control line tubing is drawn from seamless extruded tube hollows to ensure absolute product safety and reliability. Our seamless line tubing is one continuous length of tubing, completely free of any welded joints or seams. Long length coils reduce installation time and costs by eliminating the need for excessive joints preparation and fittings. Elimination of excessive fittings increase reliability and assures a leak-free system. We are capable of 100% hydrotesting each coil.


In meeting customer’s requirements, our tubing can be encapsulated in various materials such as thermalplastics, nylon and PVDF. Coiled seamless control line tubing offers many advantages to installers of hydraulic or pneumatic lines on offshore platforms and onshore refineries. It offers unmatched safety and reliability, while at the same time reducing the frequency of costly joint connections. Close tolerance control during manufacturing assures easy insertion and connection to fittings due to tubing’s inherent ductility.


Downhole hole & umbilical tubing

Our long length seamless coils are used extensively for chemical injection and hydraulic control in subsea and onshore wells. The long length minimizes the number of orbital welds which reduces the potential for weld-related defects and failures. Additionally, our coils have an extremely clean and smooth ID surface that is ideal for hydraulic and chemical injection systems. Seamless stainless steel coils offer short hydraulic response time, greater collapse strength, and elimination of methanol permeation.


Vacuum annealing

Meilong takes special care during manufacturing to assure ID and OD cleanliness of control line tubing. Vacuum annealing insures volatility of metallic oxides and removal of any residual degreasing solvents or drawing lubricants. Vacuum annealing our stainless steel tubing insures a bright, cosmetically appealing surface as well as excellent mechanical properties.


Meilong commitment to quality excellence

From the time an order is received, sent through the production process, completed, and finally shipped, many levels of inspection occur to reinforce Meilong’s Quality Policy. The job of ensuring quality products extends as far as our machine operators. Meilong operators take ownership over material processed at their stations by measuring for dimensional accuracy and conducting a visual inspection of every piece.

Umbilical Seamless Capillary Coiled Tubing Super Duplex Stainless 2507 0

Umbilical Seamless Capillary Coiled Tubing Super Duplex Stainless 2507 1



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