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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.
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API COUPLINGS FOR CASINGS
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API COUPLINGS FOR TUBING
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API CASING COUPLINGS – SHORT THREAD (STC)
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API Casing Couplings Short Thread
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Casing Size OD (inches)
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Coupling Size OD (inches)
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Length (inches) |
Weight per Coupling (lbs)
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Palletized Carton Quantity
|
Palletized Carton Weight
|
 |
4-1/2
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5.000
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6.250
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8.05
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343
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2716
|
|
5
|
5.563
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6.500
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10.18
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210
|
2168
|
|
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5-1/2
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6.050
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6.750
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11.44
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216
|
2501
|
|
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6-5/8
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7.390
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7.250
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19.97
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115
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2322
|
|
|
7
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7.656
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7.250
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18.34
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120
|
2231
|
|
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7-5/8
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8.500
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7.500
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26.93
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80
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2322
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|
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8-5/8
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9.625
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7.750
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35.58
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60
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2132
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|
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9-5/8
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10.625
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7.750
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39.51
|
50
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2006
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|
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10-3/4
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11.750
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8.000
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49.61
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45
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2079
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|
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11-3/4
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12.750
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8.000
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50.49
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35
|
1767
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|
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13-3/8
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14.375
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8.000
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56.23
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25
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1436
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|
|
16
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17.000
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9.000
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78.98
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20
|
–
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|
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18-5/8
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20
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9.000
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118.94
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10
|
–
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|
|
20
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21.000
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9.000
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98.25
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10
|
–
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API CASING COUPLINGS – LONG THREAD (LTC)
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API Casing Couplings Long Thread
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Casing Size OD (inches)
|
Coupling Size OD (inches)
|
Length (inches)
|
Weight per Coupling (lbs)
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Palletized Carton Quantity
|
Palletized Carton Weight
|
 |
4-1/2
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5.000
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7.000
|
9.07
|
294
|
2697
|
|
5
|
5.563
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7.750
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12.56
|
210
|
2573
|
|
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5-1/2
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6.050
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8.000
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14.03
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180
|
2555
|
|
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6-5/8
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7.390
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8.750
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24.82
|
100
|
2315
|
|
|
7
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7.656
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9.000
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23.67 |
100
|
2351
|
|
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7-5/8
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8.500
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9.250
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34.23
|
80
|
2807
|
|
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8-5/8
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9.625
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10.000
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47.48
|
48
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2337
|
|
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9-5/8
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10.625
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10.500
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55.77
|
40
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2302
|
|
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10-3/4
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11.750
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* 10.500
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* 62.38
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45
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* 36
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|
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11-3/4
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12.750
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* 10.500
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* 67.59
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30
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* 24
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|
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13-3/8
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14.375
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* 10.500
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* 76.63
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25
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* 20
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|
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16
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17.000
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* 11.000
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* 96.55
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20
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* 16
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|
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18-5/8
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20.000
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–
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–
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10
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8
|
|
|
20
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21.000
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* 11.500
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* 126.74
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10
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8
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| * NOT API SPECIFICATIONS. | ||||||
API CASING COUPLINGS – BUTTRESS THREAD (BTC)
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API Casing Couplings Buttress Thread
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Casing Size OD (inches)
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Coupling Size OD (inches)
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Length (inches)
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Weight per Coupling (lbs)
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Palletized Carton Quantity
|
Palletized Carton Weight
|
 |
4-1/2
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5.000
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8.875
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10.11
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196
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2007
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|
5
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5.563
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9.125
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12.99
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144
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2840
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|
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5-1/2
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6.050
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9.250
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14.14
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144
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2061
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|
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6-5/8
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7.390
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9.625
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24.46
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92
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2295
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|
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7
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7.656
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10.000
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23.22
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80
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2068
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7-5/8
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8.500
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10.375
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64.84
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64
|
2221
|
|
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8-5/8
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9.625
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10.625
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45.94
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48
|
2414
|
|
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9-5/8
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10.625
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10.625
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50.99
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40
|
2256
|
|
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10-3/4
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11.750
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10.625
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56.68
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36
|
2307
|
|
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11-3/4
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12.750
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10.625
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61.74
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24
|
2179
|
|
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13-3/8
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14.375
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10.625
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69.95
|
20
|
1429
|
|
|
16
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17.000
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10.625
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87.56
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16
|
–
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|
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18-5/8
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20.000
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10.625
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138.03
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8
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–
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|
|
20
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21.000
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10.625
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110.33
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8
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–
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API TUBING COUPLINGS – EXTERNAL UPSET END (EUE)
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API EUE Tubing Couplings
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Casing Size OD (inches)
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Coupling Size OD (inches)
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Threads per inch
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Length (inches)
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Weight per Coupling (lbs)
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Palletized Carton Quantity
|
Palletized Carton Weight
|
 |
1.90
|
2.500
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10 Round
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–
|
1.85
|
–
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–
|
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2-3/8
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3.063
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8 Round
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4.875
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3.42
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1,444
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3942
|
|
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2-7/8
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3.668
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8 Round
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5.500
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5.29
|
792
|
4220
|
|
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3-1/2
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4.500
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8 Round
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5.750
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9.02
|
448
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3860
|
|
|
4
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5.000
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8 Round
|
–
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10.62
|
392
|
–
|
|
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4-1/2
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5.563
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8 Round
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6.500
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13.31
|
252
|
3456
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API TUBING COUPLINGS – NON UPSET END (NUE)
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API Non-Upset Tubing Couplings
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Casing Size OD (inches)
|
Coupling Size OD (inches)
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Threads per inch
|
Length (inches)
|
Weight per Coupling (lbs)
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Palletized Carton Quantity
|
Palletized Carton Weight
|
 |
1.90
|
2.200
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10 Round
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3.750
|
1.85
|
–
|
–
|
|
2-3/8
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2.875
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10 Round
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4.500
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2.82
|
1,512
|
4264
|
|
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2-7/8
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3.500
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10 Round
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5.500
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5.15
|
800
|
4120
|
|
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3-1/2
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4.250
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10 Round
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5.625
|
8.17
|
502
|
4101
|
|
|
4
|
4.75
|
8 Round
|
5.75
|
9.57
|
392
|
–
|
|
|
4-1/2
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5.200
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8 Round
|
6.500
|
10.76
|
252
|
2712
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COUPLING PIPE GRADE IDENTIFICATION BY PAINT COLOR
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Grade
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Colour Coding (Painted Outside)
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| 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.
