OCTG Casing Coupling
Manufacturer Condition: In accordance with API 5CT Specification, - 7th Edition, high quality Seamless Pipe is used to manufacture couplings.
Types: Regular, Special Clearance, combination and reducing, EUE Teflon seal-rings and 20° special-bevel couplings, Changeover Couplings - Box x Box, 8 Rd x 10 Rd and LTC Buttress
Threads: According to API 5B, - Edition: Casing Threads: Short and long round, buttress, extreme line and USS Improved Buttress.
Casing Couplings API 8 Round Thread Dimension and Masses
| Label |
Outside
Diameter
D (inches) |
Outside
Diameter
W (inches) |
Length
Inches |
Mass
Lb/Ft |
Quantity
Per Carton |
Quantity
Per Carton |
| Short |
Long |
Short |
Long |
Short |
Long |
| 4-1/2 |
4.500 |
5.000 |
6-1/4 |
7 |
7.98 |
9.16 |
294 |
294 |
196 |
| 5 |
5.000 |
5.563 |
6-1/2 |
7-3/4 |
10.27 |
12.66 |
252 |
210 |
196 |
| 5-1/2 |
5.500 |
6.050 |
6-3/4 |
8 |
11.54 |
14.15 |
216 |
180 |
136 |
| 6-5/8 |
6.625 |
7.390 |
7-1/4 |
8-3/4 |
20.11 |
25.01 |
120 |
92 |
100 |
| 7 |
7.000 |
7.656 |
7-1/4 |
9 |
18.49 |
23.87 |
120 |
100 |
84 |
| 7-5/8 |
7.625 |
8.500 |
7-1/2 |
9-1/4 |
27.11 |
34.46 |
80 |
64 |
64 |
| 8-5/8 |
8.625 |
9.625 |
7-3/4 |
10 |
35.79 |
47.77 |
60 |
60 |
52 |
| 9-5/8 |
9.625 |
10.625 |
7-3/4 |
10-1/2 |
39.75 |
56.11 |
50 |
36 |
40 |
| 10-3/4 |
10.750 |
11.750 |
8 |
10-1/2 |
45.81 |
62.02 |
45 |
36 |
45 |
| 11-3/4 |
11.750 |
12.750 |
8 |
10-1/2 |
49.91 |
67.39 |
40 |
40 |
40 |
| 13-3/8 |
13.375 |
14.375 |
8 |
10-1/2 |
56.57 |
76.63 |
25 |
20 |
25 |
Casing Couplings API Buttress Threads Dimension and Masses
| Label |
Outside
Diameter
D (inches) |
Outside
Diameter
W (inches) |
Outside Diam.
Special
Clearance |
Minimum
Length
Inches |
Mass Lb/Ft |
Quantity
Per Carton |
| Regular |
Special
Clearance |
| 4-1/2 |
4.500 |
5.000 |
4.875 |
8-7/8 |
10.120 |
7.680 |
196 |
| 5 |
5.000 |
5.563 |
5.375 |
9-1/8 |
13.000 |
8.820 |
196 |
| 5-1/2 |
5.500 |
6.050 |
5.875 |
9-1/4 |
14.150 |
9.850 |
136 |
| 6-5/8 |
6.625 |
7.390 |
7.000 |
9-5/8 |
24.490 |
12.460 |
100 |
| 7 |
7.000 |
7.656 |
7.375 |
10 |
23.240 |
13.840 |
84 |
| 7-5/8 |
7.625 |
8.500 |
8.125 |
10-3/8 |
34.880 |
20.470 |
64 |
| 8-5/8 |
8.625 |
9.625 |
9.125 |
10-5/8 |
45.990 |
23.800 |
52 |
| 9-5/8 |
9.625 |
10.625 |
10.125 |
10-5/8 |
51.050 |
26.490 |
40 |
| 10-3/4 |
10.750 |
11.750 |
11.250 |
10-5/8 |
56.740 |
29.520 |
45 |
| 11-3/4 |
11.750 |
12.750 |
|
10-5/8 |
61.800 |
|
40 |
| 13-3/8 |
13.375 |
14.375 |
|
10-5/8 |
70.030 |
|
25 |
Note: All Buttress couplings are 5 threads per inch with 4-1/2 thru 13-3/8 taper tapped-3/4" per foot on diameter.
Both LTC and STC couplings are 8 threads per inch and taper tapped-3/4" per foot on diameter
Coupling Grades & Color Identification
| Grade |
Type |
Entery Coupling |
Band(s) |
| H40 |
|
None |
Same as for pipe |
| J55 Tubing |
|
Bright Green |
None |
| J55 Casing |
|
Bright Green |
One White |
| K55 |
|
Bright Green |
None |
| M65 |
|
M65 pipe uses L80 Type 1 couplings |
| N80 |
1 |
Red |
None |
| N80 |
Q |
Red |
Green |
| L80 |
1 |
Red |
One Brown |
| L80 |
9 Cr |
Red |
Two Yellow |
| L80 |
13 Cr |
Red |
One yellow |
| C90 |
1 |
Purple |
None |
| C90 |
2 |
Purple |
One yellow |
| T95 |
1 |
Silver |
None |
| T95 |
2 |
Silver |
One yellow |
| C95 |
|
Brown |
None |
| P110 |
|
White |
None |
| Q125 |
1 |
Orange |
None |
Related References:
API 5CT. Tubing
API 5L. Line Pipes
OCTG API 5L ASTM Line Pipes Specification
Chemical Composition for API 5L PSL 1 Pipes
Chemical Composition for API 5L PSL 2 Pipes
API 5L PSL 1 Pipe Mechanical Properties Tensile Strength
API 5L PSL 2 Pipe Mechanical Properties Tensile Strength
API 5L PSL 2 Pipes Impact Test Table
API 5L Steel Number Steel Designation Equivalent Table ISO 3138 EN 10027-2
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