What is API 5CT K55 Casing Tubing?
API 5CT K55 Casing:
API 5CT K55 Tubing:
API 5CT K55 Casing Tubing Specification
| Casing Pipe Specifications | |
|---|---|
| Standards: | API SPEC 5CT |
| Model in Common Use: | 2-3/8”, 2-7/8”, 3-1/2”, 4”, 4-1/2” |
| Length Range: | R1(6.10-7.32m), R2(8.53-9.75m), R3(11.58-12.8m) |
| Steel Grade (Casing Grades, Tubing Grades): | J55, K55, N80-1, N80-Q, L80, P110 |
| Type of Screw Thread: | Non upset threaded end(NUE), External upset threaded end(EUE) |
| Specialties | Threading Heat treating External upset Drifting (Full-length, or just ends) Hydrostatic Testing Full third-party inspection capabilities (EMI, SEA, and Weld Line) Couplings – EUE, AB Modified, turned down, special clearance couplings Coating to customer specifications Pup Joints |
| PRODUCT | GRADE | DIAMETER | END TYPE |
|---|---|---|---|
| K55 TUBING | J55, JFBNAU, L80, P110, 1% Chrome | 2.375” – 3.5” | Plain End |
| EUE 8RD | |||
| K55 CASING | J-55, L80 HC, P110 HC | 4.5” – 9.625” (J55, L80 HC, P110 HC) 10.75” - 20” (J55) | Plain End, STC, LTC, BTC |
| OD | Wall | PE # / ft | T&C # / ft | Collar | API Drift | Available Grades |
|---|---|---|---|---|---|---|
| 2.375″ | .190 | 4.44 | 4.7 | EUE, | ||
| AB MOD | 1.901 | J55, J-FBNAU, N80, L80, P110 | ||||
| 2.875″ | .217 | 6.17 | 6.5 | EUE, | ||
| AB MOD | 2.347 | J55, J-FBNAU, N80, L80, P110 | ||||
| 3.5″ | .254 | 8.81 | 9.3 | EUE, | ||
| AB MOD | 2.867 | J55, J-FBNAU, N80, L80, P110 |
| Pipe Casing Sizes, Oilfield Casing Sizes & Casing Drift Sizes | |
|---|---|
| Outer Diameter (Casing Pipe Sizes) | 4 1/2”-20”, (114.3-508mm) |
| Standard Casing Sizes | 4 1/2”-20”, (114.3-508mm) |
| Thread Type | Buttress thread casing, Long round thread casing, Short round thread casing |
| Function | It can protect the tubing pipe. |
| Name of Pipes | Specification | Steel Grade | Standard | ||
|---|---|---|---|---|---|
| D | (S) | (L) | |||
| (mm) | (mm) | (m) | |||
| Petroleum Casing Pipe | 127-508 | 5.21-16.66 | 6-12 | J55. M55. K55. | |
| L80. N80. P110. | API Spec 5CT (8) | ||||
| Petroleum Tubing | 26.7-114.3 | 2.87-16.00 | 6-12 | J55. M55. K55. L80. N80. P110. | API Spec 5CT (8) |
| Coupling | 127-533.4 | 12.5-15 | 6-12 | J55. M55. K55. L80. N80. P110. | API Spec 5CT (8) |
| Group | Grade | Type | C | Mn | Mo | Cr | Ni max. | Cu max. | P max. | S max. | Si max. | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min. | max. | min. | max. | min. | max. | min. | max. | ||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 1 | H40 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
| J55 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| K55 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| N80 | 1 | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| N80 | Q | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| R95 | - | - | 0.45 c | - | 1.9 | - | - | - | - | - | - | 0.03 | 0.03 | 0.45 | |
| 2 | M65 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
| L80 | 1 | - | 0.43 a | - | 1.9 | - | - | - | - | 0.25 | 0.35 | 0.03 | 0.03 | 0.45 | |
| L80 | 9Cr | - | 0.15 | 0.3 | 0.6 | 0.9 | 1.1 | 8 | 10 | 0.5 | 0.25 | 0.02 | 0.01 | 1 | |
| L80 | 13Cr | 0.15 | 0.22 | 0.25 | 1 | - | - | 12 | 14 | 0.5 | 0.25 | 0.02 | 0.01 | 1 | |
| C90 | 1 | - | 0.35 | - | 1.2 | 0.25 b | 0.85 | - | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
| T95 | 1 | - | 0.35 | - | 1.2 | 0.25 d | 0.85 | 0.4 | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
| C110 | - | - | 0.35 | - | 1.2 | 0.25 | 1 | 0.4 | 1.5 | 0.99 | - | 0.02 | 0.005 | - | |
| 3 | P110 | e | - | - | - | - | - | - | - | - | - | - | 0.030 e | 0.030 e | - |
| 4 | Q125 | 1 | - | 0.35 | 1.35 | - | 0.85 | - | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
| a The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched. | |||||||||||||||
| b The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the wall thickness is less than 17.78 mm. | |||||||||||||||
| c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched. | |||||||||||||||
| d The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm. | |||||||||||||||
| e For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum. | |||||||||||||||
| NL = no limit. Elements shown shall be reported in product analysis. |
| Standard | Type | Tensile Strength MPa | Yield Strength MPa | Hardness Max. | |---|---|---|---|---| | API SPEC 5CT | J55 | ≥517 | 379 ~ 552 | ---- | | K55 | ≥517 | ≥655 | --- | | | N80 | ≥689 | 552 ~ 758 | --- | | | L80(13Cr) | ≥655 | 552 ~ 655 | ≤241HB | | | P110 | ≥862 | 758 ~ 965 | ---- | |
| Group | Grade | Type | Total elongation under load % | Yield strength MPa | Tensile strength min. MPa | Hardness a max. | Specified wall thickness mm | Allowable hardness variation b HRC | ||
|---|---|---|---|---|---|---|---|---|---|---|
| min. | max . | HRC | HBW | |||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 1 | H40 | - | 0.5 | 276 | 552 | 414 | - | - | - | - |
| J55 | - | 0.5 | 379 | 552 | 517 | - | - | - | - | |
| K55 | - | 0.5 | 379 | 552 | 655 | - | - | - | - | |
| N80 | 1 | 0.5 | 552 | 758 | 689 | - | - | - | - | |
| N80 | Q | 0.5 | 552 | 758 | 689 | - | - | - | - | |
| R95 | - | 0.5 | 655 | 758 | 724 | - | - | - | - | |
| 2 | M65 | - | 0.5 | 448 | 586 | 586 | 22 | 235 | - | - |
| L80 | 1 | 0.5 | 552 | 655 | 655 | 23 | 241 | - | - | |
| L80 | 9Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | - | - | |
| L80 | 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | - | - | |
| C90 | 1 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | ≤ 12.70 12.71 to 19.04 19.05 to 25.39 ≥ 25.40 | 3.0 4.0 5.0 6.0 | |
| T95 | 1 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | ≤ 12.70 12.71 to 19.04 19.05 to 25.39 ≥ 25.40 | 3.0 4.0 5.0 6.0 | |
| C110 | - | 0.7 | 758 | 828 | 793 | 30 | 286 | ≤ 12.70 12.71 to 19.04 19.05 to 25.39. ≥ 25.40 | 3.0 4.0 5.0 6.0 | |
| 3 | P110 | - | 0.6 | 758 | 965 | 862 | - | - | - | - |
| 4 | Q125 | 1 | 0.65 | 862 | 1034 | 931 | b | - | ≤ 12.70 12.71 to 19.04 ≥ 19.05 | 3.0 4.0 5.0 |
| a In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method. b No hardness limits are specified, but the maximum variation is restricted as a manufacturing control in accordance with 7.8 and 7.9 of API Spec. 5CT. |
| Name | J55 | K55 | N80-1 | N80-Q | L80-1 | P110 |
|---|---|---|---|---|---|---|
| Casing | a bright green band | two bright green bands | a bright red band | a bright red band + a green band | a red band + a brown band | a bright white band |
| Coupling | entire green coupling + a white band | entire green coupling | entire red coupling | entire red coupling + a green band | entire red coupling + a brown band | entire white coupling |
| Codea | Outer Dia | Nominal weight (with thread and coupling) b,c | Wall Thickness | End processing type | | | | | | | | | |---|---|---|---|---|---|---|---|---|---|---|---|---| | mm | kg/m | mm | H40 | J55 | M65 | L80 | N801 | C90d | P110 | Q125d | | | | In | Lb/ft | K55 | C95 | N80Q | T95d | | | | | | | | | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | | 4-1-2 | 9.5 | 114.3 | 14.14 | 5.21 | S | S | S | - | - | - | - | - | | 4-1-2 | 10.5 | 114.3 | 15.63 | 5.69 | - | SB | SB | - | - | - | - | - | | 4-1-2 | 11.6 | 114.3 | 17.26 | 6.35 | - | SLB | LB | LB | LB | LB | LB | - | | 4-1-2 | 13.5 | 114.3 | 20.09 | 7.37 | - | - | LB | LB | LB | LB | LB | - | | 4-1-2 | 15.1 | 114.3 | 22.47 | 8.56 | - | - | - | - | - | - | LB | LB | | 5 | 11.5 | 127 | 17.11 | 5.59 | - | S | S | - | - | - | - | - | | 5 | 13 | 127 | 19.35 | 6.43 | - | SLB | SLB | - | - | - | - | - | | 5 | 15 | 127 | 22.32 | 7.52 | - | SLB | LB | LB | LB | LB | LB | - | | 5 | 18 | 127 | 26.79 | 9.19 | - | - | LB | LB | LB | LB | LB | LB | | 5 | 21.4 | 127 | 31.85 | 11.1 | - | - | LB | LB | LB | LB | LB | LB | | 5 | 23.2 | 127 | 34.53 | 12.14 | - | - | - | LB | LB | LB | LB | LB | | 5 | 24.1 | 127 | 35.86 | 12.7 | - | - | - | LB | LB | LB | LB | LB | | 5-1-2 | 14 | 139.7 | 20.83 | 6.2 | S | S | S | - | - | - | - | - | | 5-1-2 | 15.5 | 139.7 | 23.07 | 6.98 | - | SLB | SLB | - | - | - | - | - | | 5-1-2 | 17 | 139.7 | 25.3 | 7.72 | - | SLB | LB | LB | LB | LB | LB | - | | 5-1-2 | 20 | 139.7 | 29.76 | 9.17 | - | - | LB | LB | LB | LB | LB | - | | 5-1-2 | 23 | 139.7 | 34.23 | 10.54 | - | - | LB | LB | LB | LB | LB | LB | | 6-5-8 | 20 | 168.28 | 29.76 | 7.32 | S | SLB | SLB | - | - | - | - | - | | 6-5-8 | 24 | 168.28 | 35.72 | 8.94 | - | SLB | LB | LB | LB | LB | LB | - | | 6-5-8 | 28 | 168.28 | 41.67 | 10.59 | - | - | LB | LB | LB | LB | LB | - | | 6-5-8 | 32 | 168.28 | 47.62 | 12.06 | - | - | - | LB | LB | LB | LB | LB | | 7 | 17 | 177.8 | 25.3 | 5.87 | S | - | - | - | - | - | - | - | | 7 | 20 | 177.8 | 29.76 | 6.91 | S | S | S | - | - | - | - | - | | 7 | 23 | 177.8 | 34.23 | 8.05 | - | SLB | LB | LB | LB | LB | - | - | | 7 | 26 | 177.8 | 38.69 | 9.19 | - | SLB | LB | LB | LB | LB | LB | - | | 7 | 29 | 177.8 | 43.16 | 10.36 | - | - | LB | LB | LB | LB | LB | - | | 7 | 32 | 177.8 | 47.62 | 11.51 | - | - | LB | LB | LB | LB | LB | - | | 7 | 35 | 177.8 | 52.09 | 12.65 | - | - | - | LB | LB | LB | LB | LB | | 7-5-8 | 24 | 193.68 | 35.72 | 7.62 | S | - | - | - | - | - | - | - | | 7-5-8 | 26.4 | 193.68 | 39.29 | 8.33 | - | SLB | SLB | LB | LB | LB | LB | - | | 7-5-8 | 29.7 | 193.68 | 44.2 | 9.52 | - | - | LB | LB | LB | LB | LB | - | | 7-5-8 | 33.7 | 193.68 | 50.15 | 10.92 | - | - | LB | LB | LB | LB | LB | - | | 7-5-8 | 39 | 193.68 | 58.04 | 12.7 | - | - | - | LB | LB | LB | LB | LB | | 7-5-8 | 42.8 | 193.68 | 63.69 | 14.27 | - | - | - | LB | LB | LB | LB | LB | | 7-5-8 | 45.3 | 193.68 | 67.41 | 15.11 | - | - | - | LB | LB | LB | LB | LB | | 7-5-8 | 47.1 | 193.68 | 70.09 | 15.88 | - | - | - | LB | LB | LB | LB | LB | | 8-5-8 | 24 | 219.08 | 35.72 | 6.71 | - | S | S | - | - | - | - | - | | 8-5-8 | 28 | 219.08 | 41.67 | 7.72 | S | - | S | - | - | - | - | - | | 8-5-8 | 32 | 219.08 | 47.62 | 8.94 | S | SLB | SLB | - | - | - | - | - | | 8-5-8 | 36 | 219.08 | 53.57 | 10.16 | - | SLB | SLB | LB | LB | LB | LB | - | | 8-5-8 | 40 | 219.08 | 59.53 | 11.43 | - | - | LB | LB | LB | LB | LB | - | | 8-5-8 | 44 | 219.08 | 65.48 | 12.7 | - | - | - | LB | LB | LB | LB | | | 8-5-8 | 49 | 219.08 | 72.92 | 14.15 | - | - | - | LB | LB | LB | LB | LB |
| Codea | Outer diameter | Nominal weight (with thread and coupling) b,c | Wall thickness | End processing type | | | | | | | | | |---|---|---|---|---|---|---|---|---|---|---|---|---| | mm | kg/m | mm | H40 | J55 | M65 | L80 | N80 | C90d | P110 | Q125d | | | | In | Lb/ft | K55 | C95 | 1, Q | T95d | | | | | | | | | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | | 9-5-8 | 32.3 | 244.48 | 48.07 | 7.92 | S | - | - | - | - | - | - | - | | 9-5-8 | 36 | 244.48 | 53.57 | 8.94 | S | SLB | SLB | - | - | - | - | - | | 9-5-8 | 40 | 244.48 | 59.53 | 10.03 | - | SLB | SLB | LB | LB | LB | - | - | | 9-5-8 | 43.5 | 244.48 | 64.73 | 11.05 | - | - | LB | LB | LB | LB | LB | - | | 9-5-8 | 47 | 244.48 | 69.94 | 11.99 | - | - | LB | LB | LB | LB | LB | LB | | 9-5-8 | 53.5 | 244.48 | 79.62 | 13.84 | - | - | - | LB | LB | LB | LB | LB | | 9-5-8 | 58.4 | 244.48 | 86.91 | 15.11 | - | - | - | LB | LB | LB | LB | LB | | 10-3-4 | 32.75 | 273.05 | 48.74 | 7.09 | S | - | - | - | - | - | - | - | | 10-3-4 | 40.5 | 273.05 | 60.27 | 8.89 | S | SB | SB | - | - | - | - | - | | 10-3-4 | 45.5 | 273.05 | 67.71 | 10.16 | - | SB | SB | - | - | - | - | - | | 10-3-4 | 51 | 273.05 | 75.9 | 11.43 | - | SB | SB | SB | SB | SB | SB | - | | 10-3-4 | 55.5 | 273.05 | 82.59 | 12.57 | - | - | SB | SB | SB | SB | SB | - | | 10-3-4 | 60.7 | 273.05 | 90.33 | 13.84 | - | - | - | - | - | SB | SB | SB | | 10-3-4 | 65.7 | 273.05 | 97.77 | 15.11 | - | - | - | - | - | SB | SB | SB | | 11-3-4 | 42 | 298.45 | 62.5 | 8.46 | S | - | - | - | - | - | - | - | | 11-3-4 | 47 | 298.45 | 69.94 | 9.53 | - | SB | SB | - | - | - | - | - | | 11-3-4 | 54 | 298.45 | 80.36 | 11.05 | - | SB | SB | - | - | - | - | - | | 11-3-4 | 60 | 298.45 | 89.29 | 12.42 | - | SB | SB | SB | SB | SB | SB | SB | | 13-3-8 | 48 | 339.72 | 71.43 | 8.38 | S | - | - | - | - | - | - | - | | 13-3-8 | 54.5 | 339.72 | 81.1 | 9.65 | - | SB | SB | - | - | - | - | - | | 13-3-8 | 61 | 339.72 | 90.78 | 10.92 | - | SB | SB | - | - | - | - | - | | 13-3-8 | 68 | 339.72 | 101.19 | 12.19 | - | SB | SB | SB | SB | SB | SB | - | | 13-3-8 | 72 | 339.72 | 107.15 | 13.06 | - | - | - | SB | SB | SB | SB | SB | | 16 | 65 | 406.4 | 96.73 | 9.53 | S | - | - | - | - | - | - | - | | 16 | 75 | 406.4 | 111.61 | 11.13 | - | SB | SB | - | - | - | - | - | | 16 | 84 | 406.4 | 125.01 | 12.57 | - | SB | SB | - | - | - | - | - | | 18-5-8 | 87.5 | 473.08 | 130.21 | 11.05 | S | SB | SB | - | - | - | - | - | | 20 | 94 | 508 | 139.89 | 11.13 | SL | SLB | SLB | - | - | - | - | - | | 20 | 106.5 | 508 | 158.49 | 12.7 | - | SLB | SLB | - | - | - | - | - | | 20 | 133 | 508 | 197.93 | 16.13 | - | SLB | - | - | - | - | - | - | | S-Short round thread, L-Long round thread, B-Buttress thread | | | | | | | | | | | | | | a. Code is used for ordering reference. | | | | | | | | | | | | | | b. The nominal weight of threaded and coupled casing (column 2) is shown for reference only. | | | | | | | | | | | | | | c. Martensitic chromium steel (L80 9Cr and 13Cr) differs from carbon steel in density. The shown weight of martensitic chromium steel is not an exact value. The mass correction factor 0.989 can be used. | | | | | | | | | | | | | | d. C90, T95 and Q125 steel grade casing should be supplied according to specification, weight and wall thickness listed in the above table or order. | | | | | | | | | | | | |
| Size | Linear Mass lb/ft | Outside diameter | Wall thickness | Type of end-finish | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grade | ||||||||||||
| Non-upset | ||||||||||||
| T﹠C | Ex-Upset | |||||||||||
| T﹠C | ln. | mm | ln. | mm | J-55 | L-80 | N-801, N-80Q | C-90 | T-95 | P-110 | ||
| 2 3/8” | 4.00 | — | 2.375 | 60.33 | 0.167 | 4.24 | PN | PN | PN | PN | PN | — |
| 4.60 | 4.70 | 2.375 | 60.33 | 0.190 | 4.83 | PNU | PNU | PNU | PNU | PNU | PNU | |
| 5.80 | 5.95 | 2.375 | 60.33 | 0.254 | 6.45 | — | PNU | PNU | PNU | PNU | PNU | |
| 6.60 | — | 2.375 | 60.33 | 0.295 | 7.49 | — | P | — | P | P | — | |
| 7.35 | 7.45 | 2.375 | 60.33 | 0.336 | 8.53 | — | PU | — | PU | PU | — | |
| 2 7/8” | 6.40 | 6.50 | 2.875 | 73.03 | 0.217 | 5.51 | PUN | PNU | PNU | PNU | PNU | PNU |
| 7.80 | 7.90 | 2.875 | 73.03 | 0.276 | 7.01 | — | PNU | PNU | PNU | PNU | PNU | |
| 8.60 | 8.70 | 2.875 | 73.03 | 0.308 | 7.82 | — | PNU | PNU | PNU | PNU | PNU | |
| 9.35 | 9.45 | 2.875 | 73.03 | 0.340 | 8.64 | — | PU | — | PU | PU | — | |
| 10.50 | — | 2.875 | 73.03 | 0.392 | 9.96 | — | P | — | P | P | — | |
| 11.50 | — | 2.875 | 73.03 | 0.440 | 11.18 | — | P | — | P | P | — | |
| 3 1/2” | 7.70 | — | 3.500 | 88.90 | 0.216 | 5.49 | PN | PN | PN | PN | PN | — |
| 9.20 | 9.30 | 3.500 | 88.90 | 0.254 | 6.45 | PNU | PNU | PNU | PNU | PNU | PNU | |
| 10.20 | — | 3.500 | 88.90 | 0.289 | 7.34 | PN | PN | PN | PN | PN | — | |
| 12.70 | 12.95 | 3.500 | 88.90 | 0.375 | 9.52 | — | PNU | PNU | PNU | PNU | PNU | |
| 14.30 | — | 3.500 | 88.90 | 0.430 | 10.92 | — | P | — | P | P | — | |
| 15.50 | — | 3.500 | 88.90 | 0.476 | 12.09 | — | P | — | P | P | — | |
| 17.00 | — | 3.500 | 88.90 | 0.530 | 13.46 | — | P | — | P | P | — | |
| 4” | 9.50 | — | 4.000 | 101.60 | 0.226 | 5.74 | PN | PN | PN | PN | PN | PU |
| 10.70 | 11.00 | 4.000 | 101.60 | 0.262 | 6.65 | PU | PU | PU | PU | PU | PU | |
| 13.20 | — | 4.000 | 101.60 | 0.33. | 8.38 | — | P | — | P | P | — | |
| 16.10 | — | 4.000 | 101.60 | 0.415 | 10.54 | — | P | — | P | P | — | |
| 18.90 | — | 4.000 | 101.60 | 0.500 | 12.70 | — | P | — | P | P | — | |
| 22.20 | — | 4.000 | 101.60 | 0.610 | 15.49 | — | P | — | P | P | — | |
| 4 1/2” | 12.60 | 12.75 | 4.500 | 114.30 | 0.271 | 6.88 | PNU | PNU | PNU | PNU | PNU | — |
| 15.20 | — | 4.500 | 114.30 | 0.337 | 8.56 | — | P | — | P | P | — | |
| 17.00 | — | 4.500 | 114.30 | 0.380 | 9.65 | — | P | — | P | P | — | |
| 18.90 | — | 4.500 | 114.30 | 0.43 | 10.92 | — | P | — | P | P | — | |
| 21.50 | — | 4.500 | 114.30 | 0.500 | 12.70 | — | P | — | P | P | — | |
| 23.70 | — | 4.500 | 114.30 | 0.560 | 14.22 | — | P | — | P | P | — | |
| 26.10 | — | 4.500 | 114.30 | 0.630 | 16.00 | — | P | — | P | P | — | |
| Non-Upset T﹠C-Non-upset threaded and coupled | ||||||||||||
| Ex-Upset T﹠C-External upset threaded and coupled | ||||||||||||
| P-Plain end | ||||||||||||
| N-Non-upset threaded and coupled | ||||||||||||
| U-External upset threaded and coupled |
API 5CT K55 Casing Tubing Features
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API 5CT K55 Casing Tubing is offered with a free length range from 8 to 13m on basis of the SY/T6194-96 norm. However, it is also available no less than 6m length and its quantity should be no more than 20%.
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Any deformation such as crease, hairline, separation, crack or scab is not acceptable on both inner and outer surfaces of the product. All these defects should be completely removed, and the removed depth must not exceed 12.5% of nominal wall thickness
-
Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT K55 Casing Tubing coupling
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The surface of thread of coupling and API 5CT K55 Casing Tubing should be smooth without any burr, tear or other defects that may have a negative impact on the strength and close connection
API 5CT K55 Casing Tubing Packaging
