Suzhou Vanforge Metals Co., Ltd.
| Payment Terms | L/C, T/T |
| Supply Ability | 150000 meters per month |
| Delivery Time | 10 days (for our required MOQ) |
| Packaging Details | Tubing be level wound coiled on the wooden or metal spool, wooden case packing |
| Material | Duplex 2205 comply with NACE MR0175/ISO15156 |
| Tube type | Seamless |
| Condition | Bright annealed |
| Length | Up to 10000 meters |
| Qualification | Hydrostatic tested |
| Application | Oil and gas fields |
| Surface | Metallic bright |
| Specialty | High-pressure hydraulic |
| Size | Close dimensional tolerances |
| Performance | Enhanced mechanical properties |
| Brand Name | MEILONG |
| Model Number | 3/8'' OD x 0.049'' WT |
| Certification | ISO9001:2015, PED 97/23/EC |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 150000 meters per month |
| Delivery Time | 10 days (for our required MOQ) | Packaging Details | Tubing be level wound coiled on the wooden or metal spool, wooden case packing |
| Material | Duplex 2205 comply with NACE MR0175/ISO15156 | Tube type | Seamless |
| Condition | Bright annealed | Length | Up to 10000 meters |
| Qualification | Hydrostatic tested | Application | Oil and gas fields |
| Surface | Metallic bright | Specialty | High-pressure hydraulic |
| Size | Close dimensional tolerances | Performance | Enhanced mechanical properties |
| Brand Name | MEILONG | Model Number | 3/8'' OD x 0.049'' WT |
| Certification | ISO9001:2015, PED 97/23/EC | Place of Origin | China |
| High Light | annealed stainless steel tubing ，stainless steel coil tubing | ||
Seamless capillary coiled tubing for oil and gas industry
Meilong is a supplier of welded and redrawn, seamless and redrawn coiled tubing which are made from corrosion-resistant austenitic, duplex, super duplex stainless steels and nickel alloy grades. We have been specializing in manufacturing coiled tubing used in the oil and gas industry.
Duplex Stainless 2205 is a duplex stainless steel. When properly heat treated, the microstructure consists of a nearly equal mixture of the austenitic and ferrite phases. This two-phase microstructure produces a fine grain size which increases the yield strength. In the final heat treated condition, Duplex Stainless 2205 can achieve a yield strength approximately twice that of austenitic alloys such as 316L, 825 and 625 which must be cold worked to achieve comparable yield strengths. Duplex stainless steels are often classified as lean, conventional, super or hyper based upon their pitting resistance equivalent (PRE or PREN). Various PRE formulas are used to rank an alloy’s resistance to chloride pitting corrosion based upon its composition. Duplex Stainless 2205 typically has a PRE of 36 and is considered a conventional duplex stainless steel. Duplex Stainless 2205 is often selected for use in oil and gas production environments based upon its higher strength and resistance to pitting, crevice and stress corrosion cracking in chloride containing environments. Consult ISO 15156-3, Table A.24 for the limits regarding the use of Duplex Stainless 2205 in hydrogen sulfide containing environments for oil and gas production.
Corrosion Resistance
2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.
The combination of chromium, molybdenum and nitrogen convey the good resistance of 2205 to chloride pitting and crevice corrosion. This resistance is extremely important for services such as marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. The high chromium, molybdenum and nitrogen contents of 2205 provide corrosion resistance superior to common stainless steels, such as, 316L and 317L in most environments.
Duplex Stainless 2205, Chemical composition
| Element | Composition, % |
| Chromium | 22.0-23.0 |
| Nickel | 4.5-6.5 |
| Molybdenum | 3.0-3.5 |
| Manganese | 2.00 max. |
| Silicon | 1.00 max. |
| Carbon | 0.030 max. |
| Sulfur | 0.020 max. |
| Phosphorous | 0.030 max. |
| Nitrogen | 0.14-0.20 |
Application: High mechanical strength and good resistance to localized cracking & chloride stress corrosion.
Tensile strength, min.: 90ksi (620MPa)
Yield strength, min.: 65ksi (450MPa)
Elongation in 2 in., min.: 25%
Hardness, max.: Brinell 290, or Rockwell C 30.5
Quality Assurance
Eddy current test (ECT)
Ultrasonic test
Hydrostatic test
Chemical composition analysis
Tensile test
Hardness test
Dimension & visual inspect
Metallographic analysis
Standards and Specifications
Tubing Specification PTM-TS-011, Duplex Stainless 2205 Tubing for Control Line Applications
ASTM A789, Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
Meets the material limits for duplex stainless steel with PREN 30 to 40 as listed in ISO 15156-3, Table A.24
Coiled Tubing Size
| Imperial size | Metric size | ||
| OD | WT | OD | WT |
| 1/8 (0.125) | 0.028 | 3.18 | 0.71 |
| 0.035 | 3.18 | 0.89 | |
| 3/16 (0.188) | 0.028 | 4.76 | 0.71 |
| 0.035 | 4.76 | 0.89 | |
| 0.049 | 4.76 | 1.24 | |
| 1/4 (0.250) | 0.035 | 6.35 | 0.89 |
| 0.049 | 6.35 | 1.24 | |
| 0.065 | 6.35 | 1.65 | |
| 0.083 | 6.35 | 2.11 | |
| 3/8 (0.375) | 0.035 | 9.53 | 0.89 |
| 0.049 | 9.53 | 1.24 | |
| 0.065 | 9.53 | 1.65 | |
| 0.083 | 9.53 | 2.11 | |
| 1/2 (0.500) | 0.035 | 12.7 | 0.89 |
| 0.049 | 12.7 | 1.24 | |
| 0.065 | 12.7 | 1.65 | |
| 0.083 | 12.7 | 2.11 | |
| 5/8 (0.625) | 0.049 | 15.88 | 1.24 |
| 0.065 | 15.88 | 1.65 | |
| 0.083 | 15.88 | 2.11 | |
| 3/4 (0.75) | 0.065 | 19.05 | 1.65 |
| 0.083 | 19.05 | 2.11 | |
| 1 | 0.065 | 25.4 | 1.65 |
| 0.083 | 25.4 | 2.11 | |
Tubing length up to 32,808 feet (10,000 m)
For control line, chemical injection line, umbilicals
Available materials
Austenitic: 316L
Duplex: S31803, S32205
Super Duplex: S32750
Nickel alloy: N06625, N08825
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 | |
Application
Control line
Chemical injection line
Electrical line
Multi-line flat pack
Hydraulic line
Tubing encapsulated conductor
Intelligent well completions
Capillary tubing
Geothermal tubing
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Seller
Year Established:
1999
Total Annual:
120 million-150 million
Employee Number:
800~850
Ecer Certification：
Active Member
Suzhou Vanforge Metals Co., Ltd. was set up in April 1999 with a registered capital of 230 million Yuan in Zhangjiagang Bonded Area in Jiangsu Province of China. It has developed to be an important R&D and manufacture enterprise of high performance stainless steels and nickel alloys. &nb... Suzhou Vanforge Metals Co., Ltd. was set up in April 1999 with a registered capital of 230 million Yuan in Zhangjiagang Bonded Area in Jiangsu Province of China. It has developed to be an important R&D and manufacture enterprise of high performance stainless steels and nickel alloys. &nb...
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