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

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.

stainless steel control line

Control lines are broadly applied in many applications, such as below: 

  • Downhole hydraulic control lines
  • Downhole chemical control lines
  • Subsea control lines for hydraulic power and chemical injection line
  • Flowline control
  • Instrumentation tubing
  • Smooth inner surface control line tubing used in fibre optic applications
  • Others

Control Lines Size Range

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

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

GradeUNSC(max.)CrNiMoOthers
TP316LS31600/S316030.0317.5132.10.1
Alloy 825N088250.032038.52.6Cu=1.7, Ti=0.7
Alloy 625N66250.121.5>=589Nb=3.5

Control line tube materials Mechanical Properties

GradeYield strength,Tensile strength,Elongation
psi (MPa)psi (MPa)%
TP316L32,000 (220)75,000 (515)35
Alloy 82535,000 (240)80,000 (550)30
Alloy 62560,000 (415)110,000 (760)30

Control line material Corrosion Resistant Properties

GradeUNSPRECPT F (oC)Max H2S psiCO2
TP316LS31600/S316032495 (35)No limit+
Alloy 825N0882529140 (60)No limit++
Alloy 625N0662552195 (90)No limit++

Control Line Tube Manufacturing Forms

As the professional manufacturer of control lines, Younglee makes long coils of control line tubing in three main forms as below:

  • Seamless Tube – a billet of round bar is extruded or hot piercing into a tube and then cold rolled and drawn to final size.
  • Welded and re-drawn Tube – a strip of metal is formed and being welded to a tube, then the tube is drawn through a mold to remove (homogenize) the weld seam. Some customers also call this type “seamless”.
  • Welded and floating plug drawn – the weld tube is drawn through a mold with a floating plug in the bore to rework the weld seam internally and externally.

For more details on quality considerations, the advantages of redrawing welded tubes, and pressure calculations, please contact us for the control line datasheet.

Control Line Packing standards

  • Control line tubes can be supplied as encapsulated, PVC coated or bare line tubing
  • Control line tubes are supplied in Coil wound on wooden drum or spool.
  • Coils wound on customer-specific metal reels
coiled tubing packing in a wooden drums and cases

As one of the leading China control line tube factory, Younglee’s control line is widely supplied to customer domestic and abroad. Our control line tubes are exported to many customers in the oil and gas field in many countries, such as Russia, UAE, Saudi Arabia, Venezuela, Canada, USA, Brazil, Mexico, and so on.

We welcome customers all over the world to contact us for further information of our products of control line. Customers can contact us through:

Email: info@ylpipes.com
TEL: +86-17775807583

Chemical Injection lines | Chemical Injection line tubing in stainless steel and nickel alloy

Chemical Injection Line is another important product of Younglee. Same as control Lines, our chemical injection lines are supplied in long continuous coils in stainless steels and nickel alloys.

Chemical Injection Line Brief Introduction

Chemical Injection lines are very important material in the chemical injection system.

Chemical Injection System provides operators with precise wellbore chemical management, which is designed to optimize flow assurance and production performance and lower high cost intervention.
Chemical injection line tube usually is a coiled tubing. The coiled tubing is made of stainless steel, duplex stainless steel or nickle alloy. The coiled tubing mostly is welded & redrawn tube or seamless cold drawn tube.

Chemical Injection lines are broadly applied in chemical injection systems in many applications, such as below: 

  • Downhole chemical control lines
  • Chemical injection control lines
  • Scale – Asphaltenes – Emulsions – Hydrates
  • Foaming – Paraffin – Scavengers – Corrosion
  • Instrumentation tubing
  • Others

Chemical Injection Line Size Range

As one of the leading China Chemical injection line manufacturers, Younglee produces chemical injection lines with tubing sizes and wall thicknesses to suit all applications. Our chemical injection 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 sizes are: Chemical Injection Line 1/4″ x 0.049” WT, Chemical Injection Line 3/8″ x 0.049” WT (3/8″ Chemical Injection Line), 1/2″, 5/8″, and 3/4″ chemical injection control lines.

Besides above, other sizes are available on customers’ request.

Chemical Injection Line materials

As the professional manufacturer of chemical injection line tubing, we produce chemical injection lines in material stainless steel 316L, duplex stainless steel 2205, 2507, Nickel alloy 825 & alloy 625.
Besides the above, we also make chemical injection control line tubing with other materials upon customers’ request.

Chemical Composition of chemical injection line tubing materials

GradeUNSC(max.)CrNiMoOthers
TP316LS31600/S316030.0317.5132.10.1
Alloy 825N088250.032038.52.6Cu=1.7, Ti=0.7
Alloy 625N66250.121.5>=589Nb=3.5

Mechanical Properties of chemical injection line tube materials

GradeYield strength,Tensile strength,Elongation
psi (MPa)psi (MPa)%
TP316L32,000 (220)75,000 (515)35
Alloy 82535,000 (240)80,000 (550)30
Alloy 62560,000 (415)110,000 (760)30

Corrosion Resistant Properties of chemical injection lines

GradeUNSPRECPT F (oC)Max H2S psiCO2
TP316LS31600/S316032495 (35)No limit+
Alloy 825N0882529140 (60)No limit++
Alloy 625N0662552195 (90)No limit++

Chemical Injection Line Tubing Manufacturing Forms

As the a professional manufacturer of chemical injection lines, Younglee makes long coils of chemical injection line tubing in three main forms as below:

  • Seamless Tube – a billet of round bar is extruded or hot piercing into a tube and then cold rolled and drawn to final size.
  • Welded and re-drawn Tube – a strip of metal is formed and being welded to a tube, then the tube is drawn through a mold to remove (homogenize) the weld seam. Some customers also call this type “seamless”.
  • Welded and floating plug drawn – the weld tube is drawn through a mold with a floating plug in the bore to rework the weld seam internally and externally.

For more details on quality considerations, the advantages of redrawing welded tubes, and pressure calculations, please contact us for the chemical injection control line datasheet.

Chemical Injection Line Packing standards

The chemical injection lines are usually encapsulated or in a bundled configuration. Chemical Injection Lines can be supplied with fluid-filled, flushed and filtered to the client’s required cleanliness standard.

  • Our chemical injection line tubes can be supplied as encapsulated, PVC coated or bare line tubing
  • Packed in Coil wound on wooden drum or spool.
  • Coils wound on customer-specific metal reels

As one of the leading China chemical injection line tube factory, Younglee’s products are widely supplied to customer domestic and abroad. Our chemical injection line tubes are exported to many customers in the oil and gas field in many countries such as Russia, UAE, Saudi Arabia, Venezuela, Canada, USA, Brazil, Mexico, and so on.

Thanks to advantages in tubular chemical injection line technologies, it is now cheaper and easier to connect downhole valves and chemical injection systems with remote and satellite wells, for both fixed and floating central platforms.

We welcome customers all over the world to contact us for further information of our products of chemical injection line. Customers can contact us through:

Email: info@ylpipes.com
TEL: +86-17775807583

Stainless steel Control Line

Product Overview:

1/8”Hydraulic control line, also called capillary tube, mainly used for oil and gas field underground capillary pressure measurement. The temperature and pressure sensor (also known as a downhole permanent pressure gauge, generally a nitrogen cylinder) and the production string of the oil and gas well are run into the oil and gas layer several kilometers deep, and then the 1/8 “hydraulic control line (capillary) The temperature and pressure sensors are always connected to the surface of the fluorescent display, so that the downhole temperature and pressure can be transmitted to the surface through the capillary tube

PRODUCT DESCRIPTION:

Instructions for 1/8”Hydraulic control line 

1/8”Hydraulic control line, also called capillary tube, mainly used for oil and gas field underground capillary pressure measurement. The temperature and pressure sensor (also known as a downhole permanent pressure gauge, generally a nitrogen cylinder) and the production string of the oil and gas well are run into the oil and gas layer several kilometers deep, and then the 1/8 “hydraulic control line (capillary) The temperature and pressure sensors are always connected to the surface of the fluorescent display, so that the downhole temperature and pressure can be transmitted to the surface through the capillary tube, and the instantaneous temperature and pressure at the downhole oil and gas layer can be read out through the fluorescent screen of the surface display, thereby realizing the downhole temperature and pressure,so as to realize the real-time monitoring of downhole temperature and pressure. It can also be used for pressure control of surface safety valves and other surface valves, and various connection tubelines of large-scale equipment instrumentation control systems for oil and gas field drilling and oil production.

Instructions for 1/4”Hydraulic control line

1/4”Hydraulic control line, mainly used for the control of downhole safety valve and gas release valve of cable packer in oil and gas wells. The 1/4 “hydraulic control tubeline is connected to the downhole safety valve and gas valve, and the on-off pressure of the oil and gas well downhole safety valve and the gas release valve through the cable packer are controlled by ground pressure. After the set pressure is reached, the oil and gas well is downhole. The safety valve and the gas release valve passing through the cable packer are opened at the same time. At this time, the oil and gas well can be normally produced, and the gas separated by the electric submersible pump can also be discharged from the annulus through the gas release valve. Then, the pressure of the control tubeline is released, so that the downhole safety valve of the oil and gas well and the gas release valve passing through the cable packer are closed at the same time, and the oil and gas well oil tubes and annulus circulation channels are all blocked, so that the safety of the oil well can be ensured. Of course, the 1/4” hydraulic control line can also be used alone for the control of downhole safety valves.

It can also be used for pressure control of surface safety valves and other surface valves, and various connection tubelines of large-scale equipment instrumentation control systems for oil and gas field drilling and oil production.

Instructions for 3/8”Hydraulic control line

The 3/8“ hydraulic control line is mainly used to inject chemicals into oil and gas wells. That is, the 3/8” hydraulic control line is connected to the downhole chemical injection valve, and the descaling is performed through the 3/8“ hydraulic control line and the chemical injection valve. Chemical agent is injected from the surface into the oil tube at a certain depth down the well, which effectively removes the scaling of the oil tube and ensures the normal production of oil and gas fields.

It can also be used for pressure control of surface safety valves and other surface valves, and various connection tubelines of large-scale equipment instrumentation control systems for oil and gas field drilling and oil production.

Hydraulic tubing seamless stainless steel|China Manufacturer & Supplier

Younglee Precision Tubes manufactures and supplies high quality Seamless Stainless Steel Hydraulic tubing, our hydraulic tubing are as per specification ASTM A 269/ASTM A 213, or according to customer’s requirement, stainless steel material such as 316/316L, 304/304L,316Ti, duplex stainless steel are available, We manufacture a wide range of sizes per standard inch tube sizes and wall thicknesses, metric tube sizes and wall thicknesses.

Reading to know the material/specifications/size chart/tolerances/prices/pressure rating of our hydraulic tubing, also the packing and our best service.Don’t hesitate to contact us to get a best quotation for your reuqirement.

Don’t hesitate to contact us to get a best quotation for your reuqirement.

Material of hydraulic tubing available

Sizes chart of hydraulic tubing available

Hydraulic Tubing Tolerances

Production standards / Specification available 

Hydraulic tubing  application

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Hastelloy C276 tubing | Nickel Alloy C276 tubing-Nickel alloy tube manufactuer & Supplier

Hastelloy C276 tubing is a kind of typical nickel alloy tube, it is the seamless or welded tubing made of nickel alloy grade Hastelloy C276, which is a nickel-molybdenum-chromium alloy with addition of tungsten, and it is the same as alloy C276. 

As one of the mature nickel alloy tube suppliers & manufacturers, Younglee can manufacture C276 tubing with O.D 6 mm to 50.8 mm.

Hastelloy C276 tubing Standards

Younglee’s Hastelloy C276 seamless pipes are produced according to popular standards as below: ASTM B622, ASME SB622, ASTM B622, ASME SB622. 

We also supply C276 tubing upon customers’ specifications.

Hastelloy C276 tubing Size

We produce and supply Hastelloy C276 tubing in metric sizes and imperial sizes, size range as below.

O.D 6 mm – 50.8 mm,  W.T 0.5 mm – 6 mm

Alloy C276 tubing Material Composition (wt%)

ElementCSiMnPSCoFeCrCuMoVNi
Min414.5315Balance
Max0.020.0810.030.32.5716.54.5170.35

C276 tubing Mechanical Properties

Heat treatmentBright Annealed
Tensile Strength Rm100ksi (min)
Tensile Strength Rm690MPa (min)
R.p. 0.2% Yield41ksi (min)
R.p. 0.2% Yield290MPa (min)
Elongation (2” or 4D gl)40% (min)

Alloy C276 tubing / Hastelloy C276 tubing Advantages

C276 tubing has excellent corrosion resistance in a broad range of extreme environments. Due to the high molybdenum content, C276 alloy especially has good performance on resistance to pitting and crevice corrosion. The low carbon content minimizes carbide precipitation during welding to maintain corrosion resistance in as-welded structures. 

Monel Tubing| Monel 400 tubing| Monel 400 pipe-Monel tube suppliers

Monel Tubing Brief Introduction

Monel tubing usually refers to Monel 400 tubing, because Monel 400 is the most famous and popular nickel alloy of the Monel series. Younglee manufacturers and supplies high quality Monel 400 tubing / Monel 400 pipe with sizes and requirements upon customer’s requests.

Monel 400 tubing is widely used in many industrial areas, especially in the industries of marine and chemical processing.

Monel Tubing /Monel 400 tubing / Monel 400 pipe Sizes

As one of the first class quality monel tube suppliers & manufacturers, Younglee produces and supplies various different sizes of monel tubing /monel 400 pipe.

Size range: O.D 6 mm – O.D 50 mm

Here below are some popular dimensions of Monel 400 pipe:

  • Mertic size: O.D 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 22mm, 25mm, 28mm, 30mm
  • Imperial Size: O.D 1/4″, 5/16″, 3/8″, 1/2″, 3/4″, 1″, 1-1/4″

Other dimensions are available upon customer’s request.

Monel 400 Tubing Chemical Composition

Nickel min.CopperChromiumIronSulfurCarbonManganeseSilicon
6328.0-34.020.0-23.02.50.0240.320.5

Monel 400 Tubing/ Monel 400 pipe Mechanical Properties

Heat treatmentBright Annealed 
Tensile Strength (Rm)70ksi (min)
Tensile Strength (Rm)480 MPa (min)
R.p. 0.2% Yield28ksi (min)
R.p. 0.2% Yield195MPa (min)
Elongation (2” or 4D gl)40% (min)

Monel 400 tubing / Monel 400 pipe Typical Applications 

Monel 400 pipe / Monel 400 tubing is  broadly used in industries of Chemical processing, Oil and gas, Nuclear and Power, for the advantages of high strength and toughness over a wide temperature range and excellent resistance to many corrosive environments.

And here below are some typical applications of monel 400 tubing:

  • Heat exchangers
  • Steam Generators
  • Reboiler tubes
  • Nuclear core cooling tubes
  • Brine heaters and evaporator bodies in salt plant
  • Sulphuric and hydrofluric acid alkylation plant acids
  • Control lines

Inconel Tubing| Inconel 625 tubing| Inconel 600 tubing-China manufacturer & supplier

Inconel tubing brief introduction

Inconel tubing of Younglee is seamless tube made of inconel alloys, which are nonmagnetic, high corrosion resistant, heat resistant and oxidation resistant, nickel-based alloys.

Inconel tube has high strength and toughness in the extreme high temperature applications. And Inconel alloys have excellent fatigue strength and stress-corrosion cracking resistance to chloride ions, so nickel alloy inconel tubing is suitable for conveying various solutions containing Cl and caustic soda with concentration <70% and many other fluids.

As one of the first class inconel tubing suppliers and manufacturers in China, Younglee manufactures inconel pipes with size range O.D 5 mm – 50.8 mm in most popular inconel alloys, including inconel 600, inconel 625 and inconel 718.

Inconel tubing main series

Here below are details of the main three series of inconel pipe /tubing our factory supplies:

Inconel 625 tubing

We are one of the leading quality inconel 625 tube suppliers in China, our inconel 625 tubing is focused on small metric tubes sizes and imperial sizes.

Inconel 625 tubing sizes

Our nickel alloy inconel tube factory mainly produces inconel 625 tubing with size range O.D 6 mm – 50.8 mm. Here below are some popular sizes.
  • Inconel 625 pipe imperial sizes: OD 1/4″ x WT 0.035″,  3/8″ x 0.035″, 1/2″ x 0.035″, 1/2″ x 0.049″, 5/8″ x 0.035″, 5/8″ x 0.049″, 3/4″ x 0.065″, 5/16″ x 0.035″, 5/16″ x 0.028″;
  • Inconel 625 tube metric sizes: OD 6mm x WT 1mm, OD 8mm x WT 1mm, OD10mm x WT 1mm, OD 12mm x WT 1mm, OD 15mm x WT 1mm, OD 16mm x WT 1mm

Inconel 625 pipe standards 

We manufacture and supply inconel 625 pipes with most popular standards as below. 

  • US /ASTM Standards: ASTM B444, ASTM B751, ASTM B829, ASTM B704, ASTM B705, ASTM B755, AMS 5581
  • ISO and other standards: ISO 6207, VdTüV 499, BS 3074NA21, DIN 17751, WERKSTOFF Nr 2.4856

Inconel 625 tubing chemical composition

Here below is the chemical composition of inconel pipe 625:
C% Max.Si% Max.Mn% Max.P% Max.S% Max.Al% Max.CrCuFe% Max.MoNbTi% Max.Ni
0.10.50.50.0150.0150.420 -231.0-1.458-103.15-4.150.4Balance

Inconel 625 is known as Alloy 625 also, so our alloy 625 tubing actually are with the same chemical composition as above.

Inconel 625 tubes mechanical properties

Heat TreatmentAnnealed (Grade1)Solution-treated (Grade 2)
Tensile Rm827MPa (min)690MPa (min)
R.p. 0.2% Yield414MPa (min)276MPa (min)
Elongation (2” or 4D gl)30% (min)30% (min)

Inconel 625 is known as Alloy 625 also, so our alloy 625 tubing actually are with totally the same mechanical properties as above chart.

Inconel 600 tubing

As one of the professional inconel 600 tube suppliers in China, we produce and sell inconel 600 tubing to our customers in many countries.

Inconel 600 tubing dimensions

Our factory produces inconel 600 tubing with various sizes upon customers’ request. Here below are some popular sizes.
  • Inconel 600 tubing imperial dimensions: OD 1/4″ x WT 0.035″,  3/8″ x 0.035″, 1/2″ x 0.035″, 1/2″ x 0.049″, 5/8″ x 0.035″, 5/8″ x 0.049″, 3/4″ x 0.065″, 5/16″ x 0.035″, 5/16″ x 0.028″;
  • Inconel 600 pipe metric dimensions: OD 6mm x WT 1mm, OD 8mm x WT 1mm, OD10mm x WT 1mm, OD 12mm x WT 1mm, OD 15mm x WT 1mm, OD 16mm x WT 1mm

Inconel 600 pipe standards 

We produce and sale inconel 600 pipes with various popular standards as below. 

  • ASTM B167, ASTM B829, ASTM B517, ASTM B775, ASTM B163
  • BS 3074, BS3072-3076 (NA14) DIN 17742, DIN 17750, DIN 17754 WERKSTOFF Nr 2.4816 TÜV 305 AFNOR-NC 15 Fe
  • Other specifications upon customer’s request.

Inconel 600 tubing / alloy 600 tubing chemical composition (wt%)

Nickel min.ChromiumIronCopperSulfurCarbonManganeseSilicone
7214.9-17.06.0-10.00.50.0150.1510.5

Inconel 600 tubes / alloy 600 tubing mechanical properties

Heat treatmentAnnealed
Tensile Rm110ksi (min)
Tensile Rm738MPa (min)
R.p. 0.2% Yield37ksi (min)
R.p. 0.2% Yield255MPa (min)
Elongation (2” or 4D gl)45% (min)

Inconel 600 tubing is known as alloy 600 tubing also, because Inconel 600 is the same as alloy 600. The chemical composition and mechanical properties are the same.

Inconel 718 tube

Inconel 718 tube is an important inconel tube made of nickel-chromium alloy. Our inconel pipe can be heat-treated to give high strength, good corrosion resistance, ease of formability and which can be welded with good resistance to strain age cracking. The inconel pipe can be used at temperatures up to 700ºC.

As one of the leading inconel tube suppliers and manufacturers in China, we also produce and sell inconel 718 tube to our customers home and abroad.

Inconel 718 tube sizes

Our factory manufactures inconel 718 seamless tubes with a wide range of dimensions upon customers’ request.
 

Inconel 718 pipe standards 

We produce and sale inconel 718 seamless tube with various popular standards as below. 

  • AMS 5589, AMS 5590
  • WERKSTOFF Nr 2.4668
  • Other specifications upon customer’s request.

Inconel 718 tube chemical composition (wt% max.)

NiCrFeMoNbAlTiSCMnSiPBoron
50.0-55.017.0-21.08.57.0-9.52.75-4.00.0351.0-1.70.010.030.0350.350.0150.006

Inconel 718 pipe mechanical properties

Heat TreatmentSolution-annealed
Tensile Rm155ksi (min)
Tensile Rm1069MPa (min)
R.p. 0.2% Yield95ksi (min)
R.p. 0.2% Yield655MPa (min)
Elongation (2” or 4D gl)30% (min)

Stainless steel armored test cable

Product Overview:

Instructions for stainless steel test cables: mainly used for underground temperature and pressure measurement.

We takes the production of High pressure with extra long stainless steel control tubelines (stainless steel coils) as its leading direction. In recent years, the company has been committed to the development and production of duplex steel and nickel-based alloy control tubelines, and has been widely recognized in the market.

Outside tube:SS 316L tube
Core:1-7 No.s
Length:1200-2000M
Pressure:100Mpa
Temperature:180-400℃

Stainless steel sensor test cable
Outside tube:316L 1/4″*0.035″
Core:1-7 No.s
Length:1000-1500M
Pressure:100Mpa
Temperature:200-400℃


Stainless steel tube sensing test cable
Outside tube:316L 1/40.035 inner tube:316L ф40.8
Core:1-7 No.s
Length:1000-1500M
Pressure:100Mpa
Temperature:180-400℃



Outside tube:316L 1/8″ * 0.035″
Core:1No.s
Length:1000-1500M
Pressure:100Mpa
Temperature:180℃