Home ProductsGeothermal Tubing

ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed

China Suzhou Meilong Tube Co., Ltd. certification
I'm Online Chat Now

ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed

ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed
ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed

Large Image :  ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed

Product Details:
Place of Origin: China
Brand Name: Meilong Tube
Model Number: 3/8''OD x 0.049''WT
Payment & Shipping Terms:
Minimum Order Quantity: 1 coil
Packaging Details: Wooden case
Delivery Time: In 7 days
Payment Terms: T/T, L/C
Supply Ability: 150 metric tons per month

ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed

Process: Cold Drawing NDT: 100% Length Is Eddy Current Tested
Orbital Welds: Continuous Length Without Orbital Welds Size: Close Dimensional Tolerance
Condition: Annealed Surface: Highly Clean And Bright
Pressure Test: 100% Length Is Hydrostatic Tested Tubing Diameter: Controlled Ovality And Eccentricity
High Light:

ASTM B444 Geothermal Tubing


Geothermal Tubing 0.125 inch


Control Line Tubing Annealed

ASTM B444 Geothermal Tubing Hydraulic Control Line Annealed

Product Description:

Meilong Tube's downhole control lines are used primarily as communication conduits for hydraulically operated downhole devices in oil, gas, and water-injection wells, where durability and resistance to extreme harsh conditions are required.
These lines can be custom configured for a variety of applications and downhole components. All encapsulated materials are hydrolytically stable and are compatible with all typical well completion fluids, including high-pressure gas. The material selection is based on various criteria, including bottomhole temperature, hardness, tensile and tear strength, water absorption and gas permeability, oxidation, and abrasion and chemical resistance.
Control lines have undergone extensive development, including crush testing and high-pressure autoclave well simulation. Laboratory crush tests have demonstrated the increased loading under which encapsulated tubing can maintain functional integrity, particularly where wire-strand “bumper wires” are used.
Duplex 2507 is a super duplex stainless steel designed for applications which demand exceptional strength and corrosion resistance. Alloy 2507 has 25% chromium, 4% molybdenum, and 7% nickel. This high molybdenum, chromium and nitrogen content results in excellent resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking.
Usage of Duplex 2507 should be limited to applications below 600° F (316° C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of alloy 2507. Duplex 2507 possesses excellent mechanical properties. Often a light gauge of 2507 material can be used to achieve the same design strength of a thicker nickel alloy. The resulting savings in weight can dramatically reduce the overall cost of fabrication.
Corrosion Resistance 2507 Duplex is highly resistant to uniform corrosion by organic acids such as formic and acetic acid. It is also highly resistant to inorganic acids, especially if they contain chlorides. Alloy 2507 is highly resistant to carbide-related intergranular corrosion. Due to the ferritic portion of the duplex structure of the alloy it is very resistant to stress corrosion cracking in warm chloride containing environments. Through additions of chromium, molybdenum and nitrogen localized corrosion such as pitting and crevice attack are improved. Alloy 2507 has excellent localized pitting resistance.



Control lines can be delivered in orbital-weld-free lengths up to 40,000 ft (12,192 m) to maximize reliability.
We provide a wide range of single, dual, or triple flat-packs. Flat-packs can be combined with downhole electrical cables and/or bumper wires for easier operation and handling during deployment.
The welded-and-plug-drawn production method ensures a smooth, round tube to allow long-term metal sealing of terminations.
Encapsulation materials are selected to suit well conditions, ensuring longevity and reliability.


Technical Parameters:

Dimension Tolerance

The dimension tolerance of ASTM A789/ASME SA789/UNS S32205/UNS S32750 tubes is as follows:

  • For OD smaller than 1/2 (<12.7mm), the tolerance between OD and WT is ± 0.005’’ (±0.13mm) and ±15%, respectively.
  • For OD between 1/2’’ and 1’’ (12.7mm≤OD≤25.4mm), the tolerance between OD and WT is ± 0.004’’ (± 0.10mm) and ±10%, respectively.

Besides, the pressure of the tubes is different for different size. Please refer to the table below:

AlloyUNSO.D.W.T.Working PressureBurst PressureCollapse PressureTest Pressure
Super Duplex 2507S327501/80.1250.02819,17747,16919,17721,025
Super Duplex 2507S327501/80.1250.03523,97158,96123,97126,100
Super Duplex 2507S327501/40.2500.03511,98629,48111,98613,050
Super Duplex 2507S327501/40.2500.04916,81635,94915,81718,850
Super Duplex 2507S327501/40.2500.06522,30045,44819,52224,650


For chemical injection, capillary coiled alloy tubing is used for a variety of applications.
Hydraulic control lines for subsea safety valves are often specialized for their use, and they come in either bare or encapsulated versions.
Velocity strings, work strings, and steel tube umbilicals all make use of tubing and can be used in different applications.
Finally, geothermal coiled alloy tubing is used to transfer energy from geothermal sources and can be used surprisingly efficiently.



Meilong Tube offers custom services for Geothermal Tubing Hydraulic Control Line, Nickel Alloy Geothermal Tubing, Down Hole Geothermal Tubing, etc. We make sure that our products meet your specific needs. We use Brand Name Meilong Tube, Model Number 3/8''OD x 0.049''WT, and Condition Annealed. We guarantee Close Dimensional Tolerance and Considerably Enhanced Mechanical Properties. Our products are produced in accordance with ASTM A789, ASTM B704, ASTM B423, ASTM B444. We offer Minimum Order Quantity of 1 coil, and Packaging Details of Wooden case. We provide Delivery Time of In 7 days, Payment Terms of T/T, L/C, and Supply Ability of 150 metric tons per month. All products are 100% Length Is Eddy Current Tested.


Support and Services:

Geothermal Tubing Technical Support and Service

We offer technical support and service for our Geothermal Tubing products. Our technicians are available to help you with any questions you may have about our products, installation, and maintenance. Our technicians are experienced in geothermal systems and will be able to provide you with the answers and solutions you need.
We also provide warranty services for our Geothermal Tubing products. We guarantee the highest quality of our products and will work to ensure that your system is running properly and efficiently. In the event of a defect or malfunction, we will replace or repair the product at no additional cost to you.
We are committed to providing our customers with the best service and support available, and we are here to help you find the right solution for your geothermal needs. Please contact us if you have any questions or concerns about our products or services.


Packing and Shipping:

Geothermal Tubing packaging and shipping must meet the following criteria:

  • The tubing must be packaged securely in durable shipping containers to protect it from the elements during transit.
  • Container sizes should be appropriate for the amount of tubing being shipped.
  • Tubing should be labeled clearly with the product name and quantity.
  • Shipping containers should be clearly labeled with the shipping address and contact information.
  • All shipments should be tracked to ensure timely delivery.

Contact Details
Suzhou Meilong Tube Co., Ltd.

Contact Person: Mr. John Chen

Tel: +8618551138787

Fax: 86-512-67253682

Send your inquiry directly to us (0 / 3000)