Api Couplings

We carry a full size range of 2-3/8” to 13-3/8″ in J55, K55, N80, P110 grade. All of our couplings meet the American Petroleum Institute (API) Specifications 5CT&5B. On ground inventories are available from our Houston Inventory warehouse.

Couplings are short lengths of casing or tubing pipe which used to connect two joints of tubing or casing. They are manufactured in accordance with API 5CT & 5B specifications.

  • API Tubing Coupling
  • API Casing Coupling

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
API 5CT Casing Coupling Short Thread
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
API 5CT Casing Coupling Long Thread
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
API 5CT Buttress Thread Coupling
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
API 5CT EUE Tubing Coupling
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
API 5CT Non-Upset Coupling
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

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