Duplex 2205 2507 Incoloy 825 625 Coiled Tube
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 | |||
| OD (in.) | WT (in.) | OD (mm) | WT (mm) | ||
| SS316L Duplex 2205 Super Duplex 2507 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 | |
Duplex Stainless S31803, 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
Standards and Specifications
Tubing Specification PTM-TS-011, Duplex Stainless S32205 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
Duplex Stainless S31803, Characteristics and properties
| Nominal Outside Diameter in. | Nominal Wall Thickness in. | Minimum Burst Pressure psi | Minimum Collapse Pressure psi |
| Min. | Min. | Min. | Min. |
| 0.250 | 0.035 | 27,391 | 17,441 |
| 0.250 | 0.049 | 38,348 | 23,028 |
| 0.250 | 0.065 | 50,870 | 28,442 |
| 0.375 | 0.035 | 18,333 | 12,222 |
| 0.375 | 0.049 | 25,667 | 16,489 |
| 0.375 | 0.065 | 34,048 | 20,930 |
| 0.375 | 0.083 | 43,476 | 25,371 |
| 0.500 | 0.035 | 13,777 | 8,091 |
| 0.500 | 0.049 | 19,288 | 12,798 |
| 0.500 | 0.065 | 25,586 | 16,444 |
| 0.500 | 0.083 | 32,672 | 20,233 |
| 0.625 | 0.035 | 11,035 | 4,990 |
| 0.625 | 0.049 | 15,449 | 9,903 |
| 0.625 | 0.065 | 20,494 | 13,478 |
| 0.625 | 0.083 | 26,169 | 16,722 |
Manufacturing Process and Resultant Properties
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.
Nondestructive Testing (NDT)
Eddy current testing (ECT) is performed on the longitudinally seam welded tubing and strip splice welds in the as-heat treated condition. Those strip splice welds detected by ECT. Yield pressure hydrostatic testing is performed on the heat treated tubing at final size.
Application
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.
Geothermal
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.
Instrumentation
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 | |
