API 5CT Tubing Pipe

Forever Steel Manufacturing Co., Ltd
API 5CT tubing pipe,oil tubing pipe,OCTG tubing,EUE tubing,NUE tubing,production tubing

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API 5CT Tubing Pipe

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Tubing

Product Name: API 5CT Tubing Pipe, Oilfield Tubing Pipe
Pipe Type: Seamless tubing pipe, ERW tubing pipe
Outside Diameter:1.050" to 4-1/2" (26.67mm – 114.3mm)
Wall Thickness:2.87mm – 16.0mm
Length: R1, R2, R3
Grades: J55, N80-1, N80-Q, L80-1, L80-9Cr, L80-13Cr, C90, C95, P110, Q125
Standard: API 5CT PSL1/PSL2
Connections: NUE, EUE, STC, LTC, BTC, VAM, VAM TOP, NEW VAM, HYDRILL CS
Applications: Production strings, injection wells, workover and completion operations




  • Overview
  • Specification
  • Standard
  • Process
  • Packing

API 5CT Oil Tubing (OCTG)

Our API 5CT Tubing is the primary conduit used to transport crude oil and natural gas from the producing formation to the surface. Engineered for durability, our tubing strings are designed to withstand the combined stresses of high-pressure fluid flow, corrosive environments, and deep-well mechanical loads.


1. Technical Specifications

Outside Diameter (OD):1.050" to 4-1/2" (26.67mm – 114.3mm)

Wall Thickness (WT):2.87mm – 16.0mm

Length Range:R1 (6.10m-8.53m),R2 (8.53m-9.75m), R3 (9.75m-12.80m)

Manufacturing Process:Seamless (SMLS) or Electric Resistance Welded (ERW)


2. Material Grades & Service Environments

We offer a complete range of API grades tailored to specific downhole conditions:

Standard Service:H40, J55, K55, N80-1, N80-Q

Sour Service (H2S Resistance):L80-1, C90, T95

Corrosion Resistance (CO2/Brine):L80-9Cr, L80-13Cr

High Strength:P110


3. Connection & Threading Types

Available in non-upset (NUE) and external upset (EUE) configurations to ensure maximum joint strength:

EUE (External Upset End):Reinforced ends for higher tensile strength in deep wells.

NUE (Non-Upset End):Used for shallower or lower-pressure applications.

Premium Connections:Special gas-tight threads for high-pressure gas wells and thermal recovery.


4. Key Applications

Production Strings:The main flow path for oil and gas extraction.

Injection Wells:Used for water or gas injection in Enhanced Oil Recovery (EOR).

Workover & Completion:Essential for well maintenance and intervention services.


5. Quality Control & Surface Treatment

Testing:100% Non-Destructive Testing (NDT), Hydrostatic pressure testing, and Drift testing (Full Length Drift).

Surface Protection:External black painting, vanish coating, and internal lining (optional) for corrosion prevention.

Packaging:Steel-strapped bundles with heavy-duty thread protectors; color-coded bands for grade identification according to API 5CT.

Tubing pipe specifications chart

Nominal OD (inch) OD (mm) Wall Thickness (mm) Nominal Weight (lb/ft - PPF) Linear Weight (kg/m) Common Thread Types
1.05 26.67 2.87 1.14 1.7 NU
1.315 33.4 3.38 1.7 2.53 NU, EU
1.66 42.16 3.56 2.3 3.42 NU, EU
1.9 48.26 3.68 2.75 4.09 NU, EU
2-1/16 52.4 3.91 3.25 4.84 IJ (Integral Joint)
2-3/8 60.33 4.24 4 5.95 NU, EU, PH6, FJ
2-3/8 60.33 4.83 4.6 6.85 NU, EU, PH6
2-3/8 60.33 6.27 5.8 8.63 EU, PH6, FJ
2-7/8 73.03 5.51 6.4 9.52 NU, EU, PH6, FJ
2-7/8 73.03 7.01 7.9 11.76 EU, PH6, FJ
2-7/8 73.03 8.64 9.35 13.91 EU, PH6
3-1/2 88.9 5.49 7.7 11.46 NU
3-1/2 88.9 6.45 9.2 13.69 NU, EU, PH6, FJ
3-1/2 88.9 7.34 10.2 15.18 EU, PH6, FJ
3-1/2 88.9 9.22 12.7 18.9 EU, PH6, FJ
3-1/2 88.9 11.4 15.5 23.07 EU, PH6
4 101.6 5.74 9.5 14.14 NU, EU
4 101.6 6.65 11 16.37 NU, EU, FJ
4-1/2 114.3 5.69 10.5 15.63 NU
4-1/2 114.3 6.35 11.6 17.26 NU, EU, BTC
4-1/2 114.3 7.37 13.5 20.09 EU, BTC, LTC
4-1/2 114.3 8.56 15.1 22.47 EU, BTC, LTC
4-1/2 114.3 10.54 18.9 28.13 EU, PH6


Mechanical properties of tubing pipe

Grade Group Steel Grade Yield Strength Rt 0.5% (psi) Yield Strength (MPa) Tensile Strength Rm (min psi) Tensile Strength (min MPa)
Group 1 H40 40,000 – 80,000 276 – 552 60,000 414
J55 55,000 – 80,000 379 – 552 75,000 517
K55 55,000 – 80,000 379 – 552 95,000 655
N80-1 / N80-Q 80,000 – 110,000 552 – 758 100,000 689
Group 2 L80 (1/9Cr/13Cr) 80,000 – 95,000 552 – 655 95,000 655
C90 90,000 – 105,000 621 – 724 100,000 689
T95 95,000 – 110,000 655 – 758 105,000 724
C110 110,000 – 120,000 758 – 827 115,000 793
Group 3 P110 110,000 – 140,000 758 – 965 125,000 862
Group 4 Q125 125,000 – 150,000 862 – 1,034 135,000 931

API 5CT Steel Grades Chemical Components

  Chemical Components (%)
Steel Grade C Mn Mo Cr Ni P (max) S (max) Si (max)
H40 - - - - - 0.03 0.03 -
J55 - - - - - 0.03 0.03 -
K55 - - - - - 0.03 0.03 -
N80-1/Q - - - - - 0.03 0.03 -
L80 (Type 1) 0.43 1.9 - - 0.25 0.03 0.03 0.45
L80 (9Cr) 0.15 0.30–0.60 0.90–1.10 8.0–10.0 0.5 0.02 0.01 1
L80 (13Cr) 0.15–0.22 0.25–1.00 - 12.0–14.0 0.5 0.02 0.01 1
C90 (Type 1) 0.35 1.2 0.25–0.85 1.5 0.99 0.02 0.01 0.45
T95 (Type 1) 0.35 1.2 0.25–0.85 1.5 0.99 0.02 0.01 0.45
C110 0.35 1.2 0.50–1.00 0.40–1.50 0.99 0.02 0.01 0.45
P110 - - - - - 0.03 0.03 -
Q125 0.35* 1.35 0.85 1.5 0.99 0.02 0.01 0.45

Oil Casing &Tubing (Octg) Production Process

Tubing pipe specifications chart

Nominal OD (inch) OD (mm) Wall Thickness (mm) Nominal Weight (lb/ft - PPF) Linear Weight (kg/m) Common Thread Types
1.05 26.67 2.87 1.14 1.7 NU
1.315 33.4 3.38 1.7 2.53 NU, EU
1.66 42.16 3.56 2.3 3.42 NU, EU
1.9 48.26 3.68 2.75 4.09 NU, EU
2-1/16 52.4 3.91 3.25 4.84 IJ (Integral Joint)
2-3/8 60.33 4.24 4 5.95 NU, EU, PH6, FJ
2-3/8 60.33 4.83 4.6 6.85 NU, EU, PH6
2-3/8 60.33 6.27 5.8 8.63 EU, PH6, FJ
2-7/8 73.03 5.51 6.4 9.52 NU, EU, PH6, FJ
2-7/8 73.03 7.01 7.9 11.76 EU, PH6, FJ
2-7/8 73.03 8.64 9.35 13.91 EU, PH6
3-1/2 88.9 5.49 7.7 11.46 NU
3-1/2 88.9 6.45 9.2 13.69 NU, EU, PH6, FJ
3-1/2 88.9 7.34 10.2 15.18 EU, PH6, FJ
3-1/2 88.9 9.22 12.7 18.9 EU, PH6, FJ
3-1/2 88.9 11.4 15.5 23.07 EU, PH6
4 101.6 5.74 9.5 14.14 NU, EU
4 101.6 6.65 11 16.37 NU, EU, FJ
4-1/2 114.3 5.69 10.5 15.63 NU
4-1/2 114.3 6.35 11.6 17.26 NU, EU, BTC
4-1/2 114.3 7.37 13.5 20.09 EU, BTC, LTC
4-1/2 114.3 8.56 15.1 22.47 EU, BTC, LTC
4-1/2 114.3 10.54 18.9 28.13 EU, PH6


Mechanical properties of tubing pipe

Grade Group Steel Grade Yield Strength Rt 0.5% (psi) Yield Strength (MPa) Tensile Strength Rm (min psi) Tensile Strength (min MPa)
Group 1 H40 40,000 – 80,000 276 – 552 60,000 414
J55 55,000 – 80,000 379 – 552 75,000 517
K55 55,000 – 80,000 379 – 552 95,000 655
N80-1 / N80-Q 80,000 – 110,000 552 – 758 100,000 689
Group 2 L80 (1/9Cr/13Cr) 80,000 – 95,000 552 – 655 95,000 655
C90 90,000 – 105,000 621 – 724 100,000 689
T95 95,000 – 110,000 655 – 758 105,000 724
C110 110,000 – 120,000 758 – 827 115,000 793
Group 3 P110 110,000 – 140,000 758 – 965 125,000 862
Group 4 Q125 125,000 – 150,000 862 – 1,034 135,000 931

API 5CT Steel Grades Chemical Components

  Chemical Components (%)
Steel Grade C Mn Mo Cr Ni P (max) S (max) Si (max)
H40 - - - - - 0.03 0.03 -
J55 - - - - - 0.03 0.03 -
K55 - - - - - 0.03 0.03 -
N80-1/Q - - - - - 0.03 0.03 -
L80 (Type 1) 0.43 1.9 - - 0.25 0.03 0.03 0.45
L80 (9Cr) 0.15 0.30–0.60 0.90–1.10 8.0–10.0 0.5 0.02 0.01 1
L80 (13Cr) 0.15–0.22 0.25–1.00 - 12.0–14.0 0.5 0.02 0.01 1
C90 (Type 1) 0.35 1.2 0.25–0.85 1.5 0.99 0.02 0.01 0.45
T95 (Type 1) 0.35 1.2 0.25–0.85 1.5 0.99 0.02 0.01 0.45
C110 0.35 1.2 0.50–1.00 0.40–1.50 0.99 0.02 0.01 0.45
P110 - - - - - 0.03 0.03 -
Q125 0.35* 1.35 0.85 1.5 0.99 0.02 0.01 0.45

Oil Casing &Tubing (Octg) Production Process

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