Casing Coupling is the joining of two short length pipes by the means of male and female threads. All types of casing couplings have internal threads which are known as female thread forms. These thread forms are usually machined so that they can be coupled with the external threads on pipes known as male thread forms.
Casing Couplings are strictly designed as per API specifications. There are three types of casing couplings widely used in the pipeline coupling manufacturing industries namely:
- Short Thread Casing Coupling
- Long Thread Casing Coupling
- Buttress Thread Casing Coupling
The table below shows the specifications with respect to these three casing couplings.
|
Short Thread Casing Couplings |
Casing Size- Outside Diameter (inches) |
Coupling Size – Outside Diameter (inches) |
Length (inches) |
Weight/Coupling (lbs) |
Quantity of Palletized Carton |
Weight of Palletized Carton |
|
|
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 |
7.875 |
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 |
|
|
|
|
Long Thread Casing Couplings |
Casing Size- Outside Diameter (inches) |
Coupling Size- Outside Diameter (inches) |
Length (inches) |
Weight/Coupling (lbs) |
Quantity of Palletized Carton |
Weight of Palletized Carton |
|
|
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 |
7.875 |
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 |
|
Buttress Thread Casing Couplings |
Casing Size- Outside Diameter (inches) |
Coupling Size – Outside Diameter (inches) |
Length (inches) |
Weight/Coupling (lbs) |
Quantity of Palletized Carton |
Weight of Palletized Carton |
|
|
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 |
7.875 |
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 |
Source: petropedia.com