tubing pipe, api tubing, octg tubing, api 5ct tubing, j55 tubing, l80 tubing, n80 tubing, t95 tubing, p110 tubing
tubing pipe, api tubing, octg tubing, api 5ct tubing, j55 tubing, l80 tubing, n80 tubing, t95 tubing, p110 tubing
tubing pipe, api tubing, octg tubing, api 5ct tubing, j55 tubing, l80 tubing, n80 tubing, t95 tubing, p110 tubing
tubing pipe, api tubing, octg tubing, api 5ct tubing, j55 tubing, l80 tubing, n80 tubing, t95 tubing, p110 tubing

Welded Steel Pipe

Seamless Steel Pipe

OCTG

Structural Steel Section

Stainless Steel Pipe

Coating Steel Pipe

Steel Metal

Pipe Fittings

Special Products

Tubing Pipe
Tubing Pipe
Tubing Pipe
Tubing Pipe
Tubing Pipe

Tubing Pipe

Product: Tubing Pipe, Oil Tubing, API Tubing Well Tubing, Tubing
Application: Used for extracing Oil or Gas from Wells
Size: OD: 48.26mm-114.3mm
WT: 3.18-16mm
LENGTH: R1, R2, R3
Pipe Standard: API 5CT PSL1/PSL2  J55,K55,N80-1,N80-Q,
API 5CT PSL1/PSL2  L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125
Thread: NUE, EUE,, STC, LTC, BTC, XC,HYDRILL CS
Special Service Sweet Service, Sour Service, Anti-H2S, NACE MR0175/ISO15156
Accessories: Pup Joint, Coupling, Drill Collar, Crossover etc.
  • Products details
  • Tolerance table
  • Chemical composition
  • Specification

Tubing Pipe Introduction

Product:

Tubing Pipe, Oil Tubing, API Tubing Well Tubing, Tubing

Application:

Used for extracing Oil or Gas from Wells

Size:

OD: 48.26mm-114.3mm

WT: 3.18-16mm

LENGTH: R1, R2, R3

Pipe Standard:

API 5CT PSL1/PSL2  J55,K55,N80-1,N80-Q,

API 5CT PSL1/PSL2  L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125

Thread:

NUE, EUE,, STC, LTC, BTC, XC,HYDRILL CS

Special Service

Sweet Service, Sour Service, Anti-H2S, NACE MR0175/ISO15156

Accessories:

Pup Joint, Coupling, Drill Collar, Crossover etc.


API Tubing Specs

Label

OD (mm)

WT (mm)

Type of End-finish


NU T&C

EU T&C

IJ

H40

J55

L80

N80

C90

T95

P110

1.9

2.75

2.9

2.76

48.26

3.68

PNUI

PNUI

PNUI

PNUI

PNUI

PNUI

-

1.9

3.65

3.73

-

48.26

5.08

PU

PU

PU

PU

PU

PU

PU

1.9

4.42

-

-

48.26

6.35

-

-

P

-

P

P

-

2 3/8

4

-

-

60.32

4.24

PU

PN

PN

PN

PN

PN

-

2 3/8

4.6

4.7

-

60.32

4.83

PNU

PNU

PNU

PNU

PNU

PNU

PNU

2 3/8

5.8

5.95

-

60.32

6.45

-

-

PNU

PNU

PNU

PNU

PNU

2 3/8

6.6

-

-

60.32

7.49

-

-

P

-

P

P

-

2 3/8

7.35

7.45

-

60.32

8.53

-

-

PU

-

PU

PU

-

2 7/8

6.4

6.5

-

73.02

5.51

PNU

PNU

PNU

PNU

PNU

PNU

PNU

2 7/8

7.8

7.9

-

73.02

7.01

-

-

PNU

PNU

PNU

PNU

PNU

2 7/8

8.6

8.7

-

73.02

7.82

-

-

PNU

PNU

PNU

PNU

PNU

2 7/8

9.35

9.45

-

73.02

8.64

-

-

PU

-

PU

PU

-

2 7/8

10.5

-

-

73.02

9.96

-

-

P

-

P

P

-

3 1/2

7.7

-

-

88.9

5.49

PN

PN

PN

PN

PN

PN

-

3 1/2

9.2

9.3

-

88.9

6.45

PNU

PNU

PNU

PNU

PNU

PNU

PNU

3 1/2

10.2

-

-

88.9

7.34

PN

PN

PN

PN

PN

PN

-

3 1/2

12.7

12.95

-

88.9

9.52

-

-

PNU

PNU

PNU

PNU

PNU

3 1/2

14.3

-

-

88.9

10.92

-

-

P

-

P

P

-

3 1/2

15.5

-

-

88.9

12.09

-

-

P

-

P

P

-

4

9.5

-

-

101.6

5.74

PN

PN

PN

PN

PN

PN

-

4

10.7

11

-

101.6

6.65

PU

PU

PU

PU

PU

PU

-

4

13.2

-

-

101.6

8.38

-

-

P

-

P

P

-

4

16.1

-

-

101.6

10.54

-

-

P

-

P

P

-

4 1/2

12.6

12.75

-

114.3

6.88

PNU

PNU

PNU

PNU

PNU

PNU

-

4 1/2

15.2

-

-

114.3

8.56

-

-

P

-

P

P

-


Tubing Pipe Lengths

Oil Tubing

Range 1

Range 2

Range 3

6.10~7.32

8.53~9.75

11.58~12.80


OCTG Tubing Grade

Size

Steel Grade&Connection Type

Specification

ODmm(inch)

W T/mm

H40

J55

L80—1、L80—

13Cr、R95

N80—1、N80Q

C90

T95

P110

42.16(1.660")

3.18








API

SPEC

5CT

3.56

N/U

N/U

N/U

N/U

N/U

N/U


4.85

U

U

U

U

U

U

U

48.26(1.900")

3.18

N/U

N/U

N/U

N/U

N/U

N/U


3.68

N/U

N/U

N/U

N/U

N/U

N/U


5.08

U

U

U

U

U

U

U

6.35








7.62








60.32(2-3/8")

4.24








4.83








6.45








7.49








8.53








73.02(2-7/8")

5.51

N/U

N/U

N/U

N/U

N/U

N/U

N/U

7.01



N/U

N/U

N/U

N/U

N/U

7.82



N/U

N/U

N/U

N/U

N/U

8.64




U



U

9.96








11.18

U

N

N

N

N

N


88.90(3-1/2")

5.49








6.45

N/U

N/U

N/U

N/U

N/U

N/U

N/U

7.34

N

N

N

N

N

N


9.52



N/U

N/U

N/U

N/U

N/U

10.92








12.09








13.46








101.60(4")

5.74

N

N

N

N

N

N

N

6.65

U

U

U

U

U

U

U

8.38








10.54








12.70








15.49








114.30(4-1/2")

6.88

N/U

N/U

N/U

N/U

N/U

N/U

N/U

8.56








9.65








10.92








12.70








14.22








16.00








Note： N-NU； U-EU.

  • Process

Tubing pipe manufacturing process includes steelmaking, continuous casting, hot rolling, cold drawing, heat treatment, and quality inspection.

  • Tests

Test : Chemical Component Analysis , Mechanical Properties (Ultimate tensile strenth ,Yield strenth ,Elongation )

Technical Properties ( Flattening test , flaring test , bending test , hardness test , blow test , impact test etc )

Exterior size inspection , Nondestructive test ( Ultrasonic flaw detector , eddy current flaw detector ) Hydrostatic test .

Mill Test Certificate : EN10204/3.1B and EN10204/3.2 Certificate .

Third Party Inspection : SGS , BV ,LLoyds etc

  • Packing & Delivery

Tubing pipes are bundled with steel strips, wrapped with waterproof plastic bags, and protected with thread caps. Loading into containers or bulk vessels.

  • Tolerance table

API Tubing Tolerance table


Standard

Steel Grade

Tensile Strength(MPa)

Yield Strength(MPa)

Elongation(%)

Hardness

API SPEC 5CT

J55

≥517

379～552

0.5%


K55

≥655

379~552

0.5%


N80

≥689

552~758

0.5%


L80(13Cr)

≥655

552~655

0.5%

≤241HB

P110

≥862

758~965

0.6%


  • Chemical composition

The Main Chemical Compositions(%) of Tubing and Casing

Grade

Type

C

Mn

Mo

Cr

Ni

Co

P

S

Si

Min

Max

Min

Max

Min

Max

Min

Max

Max

Max

Max

Max

Max

H40

–

–

–

–

–

–

–

–

–

–

–

0.03

0.03

–

J55

–

–

–

–

–

–

–

–

–

–

–

0.03

0.03

–

K55

–

–

–

–

–

–

–

–

–

–

–

0.03

0.03

–

N80

1.00

–

–

–

–

–

–

–

–

–

–

0.03

0.03

–

N80

Q

–

–

–

–

–

–

–

–

–

–

0.03

0.03

–

M65

–

–

–

–

–

–

–

–

–

–

–

0.03

0.03

–

L80

1.00

–

0.43a

–

1.90

–

–

–

–

0.25

0.35

0.03

0.03

0.45

L80

9Cr

–

0.15

0.30

0.60

0.90

1.10

8.00

10.00

0.50

0.25

0.02

0.01

1.00

L80

13Cr

–

0.22

0.25

1.00

–

12.00

14.00

0.50

0.25

0.02

0.01

1.00

C90

1.00

–

0.35

–

1.20

0.25b

0.85

–

1.50

0.99

–

0.02

0.01

–

C90

2.00

–

0.50

–

1.90

–

Nl

–

NL

0.99

–

0.03

0.01

–

C95

–

0.45c

–

1.90

–

–

–

–

–

–

0.03

0.03

0.45

T95

1.00

–

0.35

–

1.20

0.25d

0.85

0.40

1.50

0.99

–

0.02

0.01

–

T95

2.00

–

0.50

–

1.90

–

–

–

–

0.99

–

0.03

0.01

–

P110

–

–

–

–

–

–

–

–

–

0.03

0.03

–

Q125

1.00

–

0.35

–

1.00

0.75

–

1.20

–

0.99

–

0.02

0.01

–

Q125

2.00

–

0.35

–

1.00

NL

–

NL

–

0.99

–

0.02

0.02

–

Q125

3.00

–

0.50

–

1.90

NL

–

NL

–

0.99

–

0.03

0.01

–

Q125

4.00

–

0.50

–

1.90

NL

–

NL

–

0.99

–

0.03

0.02

–

  • Inquiry

Frequently Asked Questions

1. What is the difference between tubing and casing?

Casing is larger diameter pipe (4.5-20 inch) used to line the wellbore and withstand external pressures.

Tubing is smaller diameter pipe (1.9-4.5 inch) installed inside casing to conduct fluids from the reservoir to the surface.

Tubing must handle internal pressure, corrosion, and mechanical stresses from production operations.

2. What are the main types of tubing connections?

Two main types:

(1) API connections - EU (External Upset) and NU (Non-Upset) are standard API connections. EU has thicker walls at the box for added strength; NU has equal wall thickness throughout.

(2) Premium connections - specialized connections for high-pressure, high-temperature, or corrosive service.

Selection depends on well conditions and operational requirements.

3. How do you ensure tubing quality for corrosive environments?

For corrosive environments (H2S, CO2), we offer:

(1) L80-1/9Cr or L80-13Cr - chromium-enhanced grades for H2S resistance

(2) T95, C110 - sour service grades with specific chemistry controls

(3) Tubing with internal coating (epoxy, zinc) for additional protection

All tubing undergoes proper heat treatment to achieve required mechanical properties and corrosion resistance.

4. What is the difference between API and premium tubing connections?

API connections (EU, NU) are cost-effective and suitable for standard wells.

Premium connections (e.g., BTC, proprietary) offer:

(1) Metal-to-metal sealing for better leak resistance

(2) Higher torque capacity

(3) Better fatigue resistance for cyclic operations

(4) Reduced risk of galling

Premium connections are recommended for high-pressure, high-temperature, or critical service wells.

5. What testing and certifications do you provide for tubing?

Every tubing includes:

(1) EN 10204 3.1 mill test certificate

(2) Chemical composition report

(3) Mechanical properties (tensile, yield, hardness)

(4) Dimensional report

(5) Hydrostatic test

(6) Thread inspection with gauge verification

Additional testing available: eddy current, ultrasonic, corrosion testing.

6. Can you provide tubing in specific thread configurations?

Yes, we provide tubing in various thread configurations:

(1) Non-upset (NU) - plain end tubing requiring threading in the field

(2) External upset (EU) - box on one end, pin on the other, ready for running

(3) Integral connections - premium threads with the connection forged as part of the tube

We also offer pup joints (short joints) in various lengths for well completion.