Control lines in stainless steel and nickel alloy for downhole and subsea
Control Lines are widely used in many applications in the field of downhole and subsea. Younglee manufactures high quality control lines / control line tubing in stainless steels and nickel alloys.
Control Lines Brief Introduction
stainless steel control line
Control lines usually are coiled tubes made of stainless steel, duplex stainless steel or nickle alloys. The coiled tubes mostly are welded & redrawn tubes or seamless cold drawn tubes. Control lines are usually supplied with very long continuous lengths coiled on the drums.
Control Lines Size Range
stainless steel control line
As one of the leading China control line manufacturer, Younglee produces full range of the popular control line sizes. Our control line tubing can be supplied in metric size and imperial size.
- Outer Diameter (OD): 3 mm (0.118”) to 25.4 mm (1.00”)
- Wall Thickness (WT): 0.5mm (0.020”) to 3mm (0.118”)
- OD tolerance +/- 0.005” (0.13mm) , other tolerances are available on request
- WT tolerance +/- 10%, other tolerances are available on request
- Tubing Coil lengths up to 6,000m (20,000ft) without orbital joints depending on product dimensions and its form (seamless tube or welded tube).
- Coil lengths up to 13,500m (45,000ft) with orbital joints
The most popular size of control lines are: 1/4″ control line, 3/8″ control line, 1/2″ control lines, 5/8″ control line tubes, 3/4″ control line tubing.
Control line materials
stainless steel control line
As the professional manufacturer of control lines, we produce control line tubing in material stainless steel 316L, duplex stainless steel 2205, 2507, Nickel alloy 825 & alloy 625.
Besides the above, we also make control line tubes with other materials upon customers’ request.
Control line tubing materials Chemical Composition
| Grade | UNS | C（max.） | Cr | Ni | Mo | Others |
| TP316L | S31600/S31603 | 0.03 | 17.5 | 13 | 2.1 | 0.1 |
| Alloy 825 | N08825 | 0.03 | 20 | 38.5 | 2.6 | Cu=1.7, Ti=0.7 |
| Alloy 625 | N6625 | 0.1 | 21.5 | >=58 | 9 | Nb=3.5 |
Control line tube materials Mechanical Properties
| Grade | Yield strength, | Tensile strength, | Elongation |
| psi (MPa) | psi (MPa) | % | |
| TP316L | 32,000 (220) | 75,000 (515) | 35 |
| Alloy 825 | 35,000 (240) | 80,000 (550) | 30 |
| Alloy 625 | 60,000 (415) | 110,000 (760) | 30 |
Control line material Corrosion Resistant Properties
| Grade | UNS | PRE | CPT F (oC) | Max H2S psi | CO2 |
| TP316L | S31600/S31603 | 24 | 95 (35) | No limit | + |
| Alloy 825 | N08825 | 29 | 140 (60) | No limit | ++ |
| Alloy 625 | N06625 | 52 | 195 (90) | No limit | ++ |
Post time: Jul-21-2023