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  • RHS section,Hollow section,A53 steel pipe
  • RHS section,Hollow section,A53 steel pipe
  • RHS section,Hollow section,A53 steel pipe
  • RHS section,Hollow section,A53 steel pipe

Casing and Tubing Coupling

Product: Casing and Tubing Coupling, Casing Coupling, Tubing Coupling
Application: Used for connect 2 joints of tubing or casing
Size:
Tubing Coupling : 1.8/9 - 4-1/2''
Casing Couping:4-1/2'' - 13-3/8''
Pipe Standard:
API 5CT and 5B PSL1/PSL2 J55,K55,N80-1,N80-Q,
API 5CT and 5B L80-1,C90, C95,T95, P110, Q125
Surface: Whole Phosphating or inside phosphating and outside coating
Thread: NUE, EUE, VAM, STC, LTC, BTC, XC, VAM TOP, NEW VAM,HYDRILL CS
Special Service: Sweet Service, Sour Service, Anti-H2S, NACE MR0175/ISO15156
Packing: By carton, wooden case, wooden pallet or requirement of customer

  • Description
  • Specification
  • Standard
  • Process
  • Packing

API CASING COUPLINGS - SHORT THREAD (STC)

API Casing Couplings Short Thread

Casing Size OD (inches)

Coupling Size OD (inches)

Length (inches)

Weight per Coupling (lbs)

Palletized Carton Quantity

Palletized Carton Weight

4-1/2

5.000

6.250

8.05

343

2716

5

5.563

6.500

10.18

210

2168

5-1/2

6.050

6.750

11.44

216

2501

6-5/8

7.390

7.250

19.97

115

2322

7

7.656

7.250

18.34

120

2231

7-5/8

8.500

7.500

26.93

80

2322

8-5/8

9.625

7.750

35.58

60

2132

9-5/8

10.625

7.750

39.51

50

2006

10-3/4

11.750

8.000

49.61

45

2079

11-3/4

12.750

8.000

50.49

35

1767

13-3/8

14.375

8.000

56.23

25

1436

16

17.000

9.000

78.98

20

-

18-5/8

20

9.000

118.94

10

-

20

21.000

9.000

98.25

10

-


API CASING COUPLINGS - LONG THREAD (LTC)

API Casing Couplings Long Thread

Casing Size OD (inches)

Coupling Size OD (inches)

Length (inches)

Weight per Coupling (lbs)

Palletized Carton Quantity

Palletized Carton Weight

4-1/2

5.000

7.000

9.07

294

2697

5

5.563

7.750

12.56

210

2573

5-1/2

6.050

8.000

14.03

180

2555

6-5/8

7.390

8.750

24.82

100

2315

7

7.656

9.000

23.67

100

2351

7-5/8

8.500

9.250

34.23

80

2807

8-5/8

9.625

10.000

47.48

48

2337

9-5/8

10.625

10.500

55.77

40

2302

10-3/4

11.750

* 10.500

* 62.38

45

* 36

11-3/4

12.750

* 10.500

* 67.59

30

* 24

13-3/8

14.375

* 10.500

* 76.63

25

* 20

16

17.000

* 11.000

* 96.55

20

* 16

18-5/8

20.000

-

-

10

8

20

21.000

* 11.500

* 126.74

10

8

* NOT API SPECIFICATIONS.


API CASING COUPLINGS - BUTTRESS THREAD (BTC)

API Casing Couplings Buttress Thread

Casing Size OD (inches)

Coupling Size OD (inches)

Length (inches)

Weight per Coupling (lbs)

Palletized Carton Quantity

Palletized Carton Weight

4-1/2

5.000

8.875

10.11

196

2007

5

5.563

9.125

12.99

144

2840

5-1/2

6.050

9.250

14.14

144

2061

6-5/8

7.390

9.625

24.46

92

2295

7

7.656

10.000

23.22

80

2068

7-5/8

8.500

10.375

64.84

64

2221

8-5/8

9.625

10.625

45.94

48

2414

9-5/8

10.625

10.625

50.99

40

2256

10-3/4

11.750

10.625

56.68

36

2307

11-3/4

12.750

10.625

61.74

24

2179

13-3/8

14.375

10.625

69.95

20

1429

16

17.000

10.625

87.56

16

-

18-5/8

20.000

10.625

138.03

8

-

20

21.000

10.625

110.33

8

-


API TUBING COUPLINGS - EXTERNAL UPSET END (EUE)

API EUE Tubing Couplings

Casing Size OD (inches)

Coupling Size OD (inches)

Threads per inch

Length (inches)

Weight per Coupling (lbs)

Palletized Carton Quantity

Palletized Carton Weight

1.90

2.500

10 Round

-

1.85

-

-

2-3/8

3.063

8 Round

4.875

3.42

1,444

3942

2-7/8

3.668

8 Round

5.500

5.29

792

4220

3-1/2

4.500

8 Round

5.750

9.02

448

3860

4

5.000

8 Round

-

10.62

392

-

4-1/2

5.563

8 Round

6.500

13.31

252

3456


API TUBING COUPLINGS - NON UPSET END (NUE)

API Non-Upset Tubing Couplings

Casing Size OD (inches)

Coupling Size OD (inches)

Threads per inch

Length (inches)

Weight per Coupling (lbs)

Palletized Carton Quantity

Palletized Carton Weight

1.90

2.200

10 Round

3.750

1.85

-

-

2-3/8

2.875

10 Round

4.500

2.82

1,512

4264

2-7/8

3.500

10 Round

5.500

5.15

800

4120

3-1/2

4.250

10 Round

5.625

8.17

502

4101

4

4.75

8 Round

5.75

9.57

392

-

4-1/2

5.200

8 Round

6.500

10.76

252

2712


COUPLING PIPE GRADE IDENTIFICATION BY PAINT COLOR

Grade

Colour Coding (Painted Outside)

H-40

Black

J-55 or K-55

Green

N-80

Red

M-65 or L-80

Red with one Brown Band

L-80 Type 9CR

Red with two Yellow Bands

L-80 Type 13CR

Red with one Yellow Band

C-90 Type 1

Purple

C-90 Type 2

Purple with one Yellow Band

T-95 Type 1

Silver

T-95 Type 2

Silver with one Yellow Band

C-95

Brown

P-110

White

Q-125 Type 1

Orange

Q-125 Type 2

Orange with one Yellow Band

Q-125 Type 3

Orange with one Green Band

Q-125 Type 4

Orange with one Brown Band

Specification

Size

Type of Thread

O.D*L (mm)

Weight (kg)

2-3/8"

NUE

73.02*107.95

1.28

2-3/8"

EUE

77.80*132.82

1.55

2-7/8"

NUE

88.90*130.18

2.34

2-7/8"

EUE

93.17*133.35

2.4

3-1/2"

NUE

107.95*142.88

3.71

3-1/2"

EUE

114.30*146.05

4.1

4"

NUE

120.65*146.05

4.35

4"

EUE

127.00*152.40

4.82

4-1/2"

NUE

132.08*155.58

4.89

4-1/2"

EUE

141.30*158.75

6.05


Main Technical parameters

Couplings

Size in

Max. OD in(mm)

Min length in(mm)

Grade



NU

EU

NU

EU



23/8

2.875(73.03)

3.063(77.80)

41/4(107.95)

47/8(123.83)

J55
N80
L80


27/8

3.500(88.90)

3.668(93.20)

51/8(130.18)

51/4(133.35)



31/2

4.250(108.00)

4.500(114.30)

55/8(142.88)

53/4(146.05)


Crossovers

J55,N80,L80 All kinds of crossovers, connections and sub-couplings of grades J55, N80 and L80



COUPLING PIPE GRADE IDENTIFICATION BY PAINT COLOR

According to API 5CT standards, Oil casing and Tubing couplings should be painted one by one to distinguish different grades of steel. The color label of the oil casing and Tubing should be sprayed at any end ≥ 600mm, and the color should be painted on the whole outer surface, and then the color ring should be sprayed.


Coupling colour code

Grade

Grade Type

Colour(s) for Coupling

Number andcolour of bandsfor product

Picture

EntireCoupling

Band(s)

H40


None

Same as for pipe

None/black band at the manufacturer’s option

image006

J55 Tubing


Bright Green

None

One Bright Green

image007

J55 Casing


Bright Green

One White

One Bright Green

image009

K55


Bright Green

None

Two Bright Green

image010

M65


M65Pipe uses L80Type 1Couplings

One Bright GreenOne Blue

image016

N80

1

Red

None

One Red

image014

N80

Q

Red

One Green

One RedOne Bright Green

image016

R95


Brown

None

One Brown

image017

L80

1

Red

One Brown

One RedOne Brown

image019

L80

9Cr

None

Two Yellow

One Red,One Brown,Two Yellow

image020

L80

13Cr

None

One Yellow

One Red,One Brown,One Yellow

image022

C90

1

Purple

None

One Purple

image023

T95

1

Silver

None

One Silver

image025

C110


White

Two Brown

One White,Two Brown

image027

P110


White

None

One White

image029

Q125


Orange

None

One Orange

image031


There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.

● Plastic caps plugged at the two sides of pipe ends

● Should be avoided by the steel strapping and transport damage

● Bundled signs should be uniform and consistent

● The same bundle(batch) of steel pipe should be came from the same furnace.

● The steel pipe has the same furnace number, the same steel grade, the same specifications.

Our packing can meet any needs of the customers.

Inquiry Online

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