Menu
Diyak Ltd. Engineering offers a wide variety Couplings for Casing, Tubings and Line Pipes. The Tubing / Casing and Line Pipe Couplings are manufactured to meet the requirements of API 5CT and API 5L certifications respectively.
Below are the sizes of the API 5CT Couplings for Casing and Tubings that we offer.
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 |
Diyak Ltd. specializes in supply of various Engineering Polymer components and Oil Field equipment. Through internal growth, associations and acquisitions, Diyak Ltd. now offers a broad spectrum of products and services that encompass various industries about us.
