Exploring the Differences Between N80-1 and N80-Q Pipe: A Comprehensive Guide
Introduction
N80-1 and N80-Q are two types of steel pipes used in the Oil and gas industry. Both pipes are made from grade C or Grade L material and are used for a variety of applications. While they are similar in many ways, there are some key differences between the two that should be taken into consideration when selecting the right pipe for a particular project. This guide will provide an overview of the differences between N80-1 and N80-Q pipe, including their material composition, mechanical properties, and applications.
API 5ct L80 casing Tubing Grade color Codes | ||||
Grade | Grade Type | Number and Color of Bands for Product a with Length ³ 1.8 m | Color(s) for couplings | |
Entire Coupling | Band(s) b, c | |||
1 | 2 | 3 | 4 | 5 |
H40 | — | None or black band at the Manufacturer’s option | None | Same as for pipe |
J55 tubing | — | One bright green | Bright green | None |
J55 Casing | — | One bright green | Bright green | One white |
K55 | — | Two bright green | Bright green | None |
N80 | 1 | One red | Red | None |
N80 | Q | One red, one bright green | Red | Green |
R95 | — | One brown | Brown | None |
L80 | 1 | One red, one brown | Red | One brown |
L80 | 9Cr | One red, one brown, two yellow | None | Two yellow |
L80 | 13Cr | One red, one brown, one yellow | None | One yellow |
C90 | 1 | One purple | Purple | None |
T95 | 1 | One silver | Silver | None |
C110 | — | One white, two brown | White | Two brown |
P110 | — | One white | White | None |
Q125 | 1 | One orange | Orange | None |
a In the case of coupling material, unless otherwise specified in the purchase agreement, the manufacturer’s internal requirements shall govern. | ||||
b special clearance couplings shall also have a black band. | ||||
c Seal-ring couplings shall also have a blue band. |
Material Composition
N80-1 and N80-Q pipes are both made from Grade C or Grade L material. Grade C material is a low-carbon steel that is used for general purpose applications, while Grade L material is a higher-carbon steel that is used for higher-pressure applications. The difference between the two grades is the amount of carbon present in the material. Grade C material has a carbon content of 0.15-0.25%, while Grade L material has a carbon content of 0.30-0.50%.
Mechanical Properties
The mechanical properties of N80-1 and N80-Q pipes are also different. N80-1 pipe has a higher yield strength than N80-Q pipe, with a minimum yield strength of 80,000 psi for N80-1 and 75,000 psi for N80-Q. N80-1 pipe also has a higher tensile strength than N80-Q pipe, with a minimum tensile strength of 95,000 psi for N80-1 and 90,000 psi for N80-Q.
Labels a | Calculated Mass c | ||||||||||
Nominal Linear Mass T& C b,c | Wall Thick- ness | em, Mass Gain or Loss Due to End Finishing d | |||||||||
Outside Diameter | Inside Diameter | Drift Diameter | Plain- end | kg | |||||||
round Thread | Buttress Thread | ||||||||||
wpe | |||||||||||
D | kg/m | t | D | mm | kg/m | Short | Long | RC | SCC | ||
mm | mm | mm | |||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
8 5/8 | 24 | 219.08 | 35.72 | 6.71 | 205.66 | 202.48 | 35.14 | 10.93 | — | — | — |
8 5/8 | 28 | 219.08 | 41.67 | 7.72 | 203.64 | 200.46 | 40.24 | 10.07 | — 12.44 | — 12.57 | — 2.51 |
8 5/8 | 32 | 219.08 | 47.62 | 8.94 | 201.2 | 200.02 e 198.02 195.58 | 46.33 | 9.39 | 12.44 | 12.57 | 2.51 |
8 5/8 | 32 | 219.08 | 47.62 | 8.94 | 201.2 | 193.68 e | 46.33 | 9.39 | 11.6 | 11.68 | 1.62 |
8 5/8 | 36 | 219.08 | 53.57 | 10.16 | 198.76 | 193.04 | 52.35 | 8.72 | 10.73 | 10.77 | 0.71 |
8 5/8 | 40 | 219.08 | 59.53 | 11.43 | 196.22 | 190.5 | 58.53 | — | 10.73 | 10.77 | 0.71 |
8 5/8 | 40 | 219.08 | 59.53 | 11.43 | 196.22 | 187.6 | 58.53 | — | 9.88 | 9.87 | –0.20 |
8 5/8 | 44 | 219.08 | 65.48 | 12.7 | 193.68 | 64.64 | — | 8.88 | 8.85 | –1.21 | |
8 5/8 | 49 | 219.08 | 72.92 | 14.15 | 190.78 | 71.51 | — | ||||
9 5/8 | 32.3 | 244.48 | 48.07 | 7.92 | 228.6 | 224.66 | 46.2 | 11 | — 14.48 | — 13.87 | — 2.74 |
9 5/8 | 36 | 244.48 | 53.57 | 8.94 | 226.6 | 222.63 | 51.93 | 10.36 | 13.59 | 12.97 | 1.84 |
9 5/8 | 40 | 244.48 | 59.53 | 10.03 | 224.4 | 222.25 e 220.45 218.41 218.41 216.54 216.54 | 57.99 | 9.69 | 13.59 | 12.97 | 1.84 |
9 5/8 | 40 | 244.48 | 59.53 | 10.03 | 224.4 | 215.90 e | 57.99 | 9.69 | 12.78 | 12.15 | 1.01 |
9 5/8 | 43.5 | 244.48 | 64.74 | 11.05 | 222.4 | 215.90 e 212.83 212.83 | 63.61 | — | 12.84 f | 12.15 | 1.01 |
9 5/8 | 43.5 | 244.48 | 64.74 | 11.05 | 222.4 | 212.72 e | 63.61 | — | 12.03 | 11.39 | 0.25 |
9 5/8 | 47 | 244.48 | 69.94 | 11.99 | 220.5 | 212.72 e 210.29 210.29 209.58 206.38 203.23 200.02 | 68.75 | — | 12.09 f | 11.39 | 0.25 |
9 5/8 | 47 | 244.48 | 69.94 | 11.99 | 222.5 | 68.75 | — | 10.57 | 9.92 | –1.22 | |
9 5/8 | 53.5 | 244.48 | 79.62 | 13.84 | 216.8 | 78.72 | — | 10.63 f | 9.92 | –1.22 | |
9 5/8 | 53.5 | 244.48 | 79.62 | 13.84 | 216.8 | 78.72 | — | 10.57 | 9.92 | –1.22 | |
9 5/8 | 53.5 | 244.48 | 79.62 | 13.84 | 216.8 | 78.72 | — | 10.63 f | 9.92 | –1.22 | |
9 5/8 | 53.5 | 244.48 | 79.62 | 13.84 | 216.8 | 78.72 | — | 9.58 | 8.92 | –2.22 | |
9 5/8 | 58.4 | 244.48 | 86.91 | 15.11 | 214.25 | 85.47 | — | 9.65 f | 8.92 | –2.22 | |
9 5/8 | 58.4 | 244.48 | 86.91 | 15.11 | 214.25 | 85.47 | — | 9.58 | 8.92 | –2.22 | |
9 5/8 | 58.4 | 244.48 | 86.91 | 15.11 | 214.25 | 85.47 | — | 9.65 f | 8.92 | –2.22 | |
9 5/8 | 58.4 | 244.48 | 86.91 | 15.11 | 214.25 | 85.47 | — | — | — | — | |
9 5/8 | 59.4 | 244.48 | 88.4 | 15.47 | 213.5 | 87.37 | — | — | — | — | |
9 5/8 | 64.9 | 244.48 | 96.58 | 17.07 | 210.3 | 95.73 | — | — | — | — | |
9 5/8 | 70.3 | 244.48 | 104.62 | 18.64 | 207.2 | 103.82 | — | — | — | — | |
9 5/8 | 75.6 | 244.48 | 112.51 | 20.24 | 204 | 111.93 | — |
Applications
N80-1 and N80-Q pipes are both used in a variety of applications in the oil and gas industry. N80-1 pipe is typically used for general purpose applications, such as casing and tubing, while N80-Q pipe is used for higher-pressure applications, such as production tubing and completion strings.
Conclusion
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N80-1 and N80-Q pipes are both commonly used in the oil and gas industry. While they are similar in many ways, there are some key differences between the two that should be taken into consideration when selecting the right pipe for a particular project. This guide has provided an overview of the differences between N80-1 and N80-Q pipe, including their material composition, mechanical properties, and applications.