OCTG PIPE SIZES CHARTS API 5CT


The API 5CT specification defines standards for OCTG pipes (oil country tubular goods). The article shows the standard size and weight combinations (outside diameter and wall thickness in inches and mm, including the type of end finish)or OCTG casing and tubing pipes used in upstream oil & gas operations.


 

OTCG CASING PIPES

Casing pipes API 5CT

Note: P = plain end, S = short round thread, L = long round thread, B = buttress thread. Sizes per API 5CT specification

OCTG Casing
Pipe Size
API 5CT

Weight

Lbs/ft

Outside Diameter Wall Thickness Type End Finish
Grade
ln. mm ln. mm H-40 J-55 K-55 M-65 L-80C-95 N-80 C-90T-95 P-110 Q-125
7 5/8” 24.00 7.625 193.68 0.300 7.62 PS
26.40 7.625 193.68 0.328 8.33 PSLB PSLB PLB PLB PLB PLB
29.70 7.625 193.68 0.375 9.53 PLB PLB PLB PLB PLB
33.70 7.625 193.68 0.430 10.92 PLB PLB PLB PLB PLB
39.00 7.625 193.68 0.500 12.70 PLB PLB PLB PLB PLB
42.80 7.625 193.68 0.562 14.27 PLB PLB PLB PLB PLB
45.30 7.625 193.68 0.595 15.11 PLB PLB PLB PLB PLB
47.10 7.625 193.68 0.625 15.88 PLB PLB PLB PLB PLB
51.20 7.625 193.68 0.687 17.45 P
55.30 7.75 193.68 196.85 19.05 P
7 3/4” 46.10 8.625 219.08 0.595 15.11 P P P P P
8 5/8” 24.00 8.625 219.08 0.264 6.71 PS PS
28.00 8.625 219.08 0.304 7.72 PS PS
32.00 8.625 219.08 0.352 8.94 PS PSLB PSLB
36.00 8.625 219.08 0.400 10.16 PSLB PSLB PLB PLB PLB PSLB
40.00 8.625 219.08 0.450 11.43 PLB PLB PLB PLB PLB
44.00 8.625 219.08 0.500 12.70 PLB PLB PLB PLB PLB
49.00 9.625 244.48 0.557 14.15 PLB PLB PLB PLB PLB
9 5/8” 32.30 9.625 244.48 0.312 7.92 PS
36.00 9.625 244.48 0.352 8.94 PS PSLB PSLB
40.00 9.625 244.48 0.395 10.03 PSLB PSLB PLB PLB PLB
43.50 9.625 244.48 0.435 11.05 PLB PLB PLB PLB PLB
47.00 9.625 244.48 0.472 11.99 PLB PLB PLB PLB PLB PLB
53.50 9.625 244.48 0.545 13.84 PLB PLB PLB PLB PLB
58.40 9.625 244.48 0.595 15.11 PLB PLB PLB PLB PLB
59.40 9.625 244.48 0.609 15.47 P
64.90 9.625 244.48 0.672 17.07 P
70.30 9.625 244.48 0.734 18.64 P
75.60 9.625 244.48 0.797 20.24 P

 

OCTG Casing
Pipe Size
API 5CT
Weight Lb/ft Outside Diameter Wall Thickness Type End Finish
Grade
ln. mm ln. mm H-40 J-55
K-55
M-65 L-80
C-95
N-80 C-90T-95 P-110 Q-125
10 3/4” 32.75 10.75 273.05 0.279 7.09 PS
40.50 10.75 273.05 0.350 8.89 PS PSB PSB
45.50 10.75 273.05 0.400 10.16 PSB PSB
51.00 10.75 273.05 0.450 11.43 PSB PSB PSB PSB PSB PSB
55.50 10.75 273.05 0.495 12.57 PSB PSB PSB PSB PSB
60.70 10.75 273.05 0.545 13.84 PSB PSB PSB
65.70 10.75 273.05 0.595 15.11 PSB PSB PSB
73.20 10.75 273.05 0.672 17.07 P
79.20 10.75 273.05 0.734 18.64 P
85.30 10.75 273.05 0.797 20.24 P
11 3/4” 42.00 11.75 298.45 0.333 8.46 PS
47.00 11.75 298.45 0.375 9.53 PSB PSB
54.00 11.75 298.45 0.435 11.05 PSB PSB
60.00 11.75 298.45 0.489 12.42 PSB PSB PSB PSB PSB PSB PSB
65.00 11.75 298.45 0.534 13.56 P P P P P
71.00 11.75 298.45 0.582 14.78 P P P P P
13 3/8” 48.00 13.375 339.73 0.330 8.38 PS
54.50 13.375 339.73 0.380 9.65 PSB PSB
61.00 13.375 339.73 0.430 10.92 PSB PSB
68.00 13.375 339.73 0.480 12.19 PSB PSB PSB PSB PSB PSB
72.00 13.375 339.73 0.514 13.06 PSB PSB PSB PSB PSB
P-plain end;S-short round thread;L-long round thread;B-buttress thread。


OTCG TUBING PIPES

Tubing pipes API 5CT

Note: P = plain end, N = Non-upset thread and coupling, U = upset thread and coupling. Sizes per API 5CT specification

OCTG Tubing
Pipe Size
API 5CT
Weight Lb/ft Outside Diameter Wall Thickness Nominal Weight Type End Finish
Grade
Nonupset Ex-upset mm mm Nonupset Ex-upset J-55 L-80 N-80 C-90 T-95 P-110
T & C T & C T & C T & C
2 3/8” 4 60.32 4.24 5.95 PN PN PN PN PN
4.6 4.7 60.32 4.83 6.85 6.99 PNU PNU PNU PNU PNU PNU
5.8 5.95 60.32 6.45 8.63 8.85 PNU PNU PNU PNU PNU
6.6 60.32 7.49 9.82 P P P
7.35 7.45 60.32 8.53 10.94 11.09 PU PU PU
2 7/8” 6.4 6.5 73.02 5.51 9.52 9.67 PUN PNU PNU PNU PNU PNU
7.8 7.9 73.02 7.01 11.61 11.76 PNU PNU PNU PNU PNU
8.6 8.7 73.02 7.82 12.8 12.95 PNU PNU PNU PNU PNU
9.35 9.45 73.02 8.64 13.91 14.06 PU PU PU
10.5 73.02 9.96 15.63 P P P
11.5 73.02 11.18 17.11 P P P
3 1/2” 7.7 88.9 5.49 11.46 PN PN PN PN PN
9.2 9.3 88.9 6.45 13.69 13.84 PNU PNU PNU PNU PNU PNU
10.2 88.9 7.34 15.18 PN PN PN PN PN
12.7 12.95 88.9 9.52 18.9 19.27 PNU PNU PNU PNU PNU
14.3 88.9 10.92 21.28 P P P
15.5 88.9 12.09 23.07 P P P
17 88.9 13.46 25.3 P P P
4” 9.5 101.6 5.74 14.14 PN PN PN PN PN PN
10.7 11 101.6 6.65 16.37 PU PU PU PU PU PU
13.2 101.6 8.38 19.64 P P P
16.1 101.6 10.54 23.96 P P P
18.9 101.6 12.7 28.13 P P P
22.2 101.6 15.49 33.04 P P P
4 1/2” 12.6 12.75 114.3 6.88 18.75 18.97 PUN PNU PNU PNU PNU PNU
15.2 114.3 8.56 22.62 P P P
17 114.3 9.65 25.3 P P P
18.9 114.3 10.92 28.13 P P P
21.5 114.3 12.7 32 P P P
23.7 114.3 14.22 35.27 P P P
26.1 114.3 16 38.84 P P P