Central Steel
sales@central-steels.com
0086-731-8559-1670
Central Steel
Central Steel
sales@central-steels.com0086-731-8559-1670INQUIRE NOW
Grades of Casing pipe:
Sizes of Casing pipe:
Diameter :from 4 1/2 inch to 20 inch （48.26mm - 508mm)
Nominal Weight: from 9.5 lb/ft to 169 lb/ft, from 9.5 ppf to 169 ppf
Lenght: R1, R2, R3
Types of Casing pipe:
Seamless casing (small-diameter, medium-diameter)
ERW casing (medium-diameter)
Casing nipple
Casing coupling
Applications of casing pipe:
oil well extracting casing
borehole casing
borewell casing
Connections of casing pipe
API 5CT is applicable to following connections which complied with API SPEC 5B:
• SC: Short round thread casing
• LC: Long ound thread casing
• BC: Buttress thread casing
• NU: Non-upset tubing
• EU: External upset tubing
• IJ: Integral tubing connections
4 Groups of Grade
• Group 1: All casing and tubing in Grades with H, J, K, N and R
• Group 2: All casing and tubing in Grades with C, L, M and T
• Group 3: All casing and tubing in Grade P
• Group 4: All casing in Grade Q
Chemical Composition of API 5CT steel casing and tubing pipes:
| Chemical composition,mass fraction(%) | |||||||||||||||
| Group | Grade | Type | C | Mn | Mo | Cr | Ni | Cu | P | S | Si | ||||
| Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | Max. | Max. | Max. | Max. | Max. | |||
| 1 | H40 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – |
| J55 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – | |
| K55 | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – | ||||
| N80 | 1 | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – | |
| N80 | Q | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – | |
| R95 | – | – | 0.45 | – | 1.90 | – | – | – | – | – | – | 0.03 | 0.030 | 0.45 | |
| 2 | M65 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – |
| L80 | 1 | – | 0.43 | – | 1.90 | – | – | – | – | 0.25 | 0.35 | 0.03 | 0.030 | 0.45 | |
| L80 | 9Cr | – | 0.15 | 0.30 | 0.60 | 0.90 | 1.10 | 8.00 | 10.00 | 0.50 | 0.25 | 0.02 | 0.010 | 1.00 | |
| L80 | 13Cr | 0.15 | 0.22 | 0.25 | 1.00 | – | – | 12.00 | 14.00 | 0.50 | 0.25 | 0.02 | 0.010 | 1.00 | |
| C90 | 1 | – | 0.35 | – | 1.20 | 0.25 | 0.85 | – | 1.50 | 0.99 | – | 0.02 | 0.010 | – | |
| T95 | 1 | – | 0.35 | – | 1.20 | 0.25 | 0.85 | 0.40 | 1.50 | 0.99 | – | 0.02 | 0.010 | – | |
| C110 | – | – | 0.35 | – | 1.20 | 0.25 | 1.00 | 0.40 | 1.50 | 0.99 | – | 0.02 | 0.005 | – | |
| 3 | P110 | – | – | – | – | – | – | – | – | – | – | – | 0.03 | 0.030 | – |
| 4 | Q125 | 1 | – | 0.35 | – | 1.35 | – | 0.85 | – | 1.50 | 0.99 | – | 0.02 | 0.010 | – |
Mechanical Properties of API 5CT steel casing and tubing pipes:
| Mechanical Properties | ||||||||
| Group | Steel Grade | Type | Total | Yield Strength (Mpa) | Tensile Strength (Mpa) | Hardness max. | ||
| % | min. | max. | MPa | HRC | HWB | |||
| 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 | |
| T95 | 1 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | |
| C110 | – | 0.7 | 758 | 828 | 793 | 30 | 286 | |
| 3 | P110 | – | 0.6 | 758 | 965 | 862 | – | – |
| 4 | Q125 | 1 | 0.65 | 862 | 1034 | 931 | – | |
Size table of casing pipe
|
Outside Diameter (Inches) |
Available Poundage (Pounds Per Foot) |
|
4-1/2 |
9.50 PPF to 15.10 PPF |
|
5 |
11.50 PPF to 24.10 PPF |
|
5-1/2 |
14.00 PPF to 43.10 PPF |
|
6-5/8 |
20.00 PPF to 32.00 PPF |
|
7 |
17.00 PPF to 57.10 PPF |
|
7-5/8 |
24.00 PPF to 55.30 PPF |
|
7-3/4 |
46.10 PPF |
|
8-5/8 |
24.00 PPF to 49.00 PPF |
|
9-5/8 |
32.30 PPF to 75.60 PPF |
|
10-3/4 |
32.75 PPF to 85.30 PPF |
|
11-3/4 |
42.00 PPF to 71.00 PPF |
|
13-3/8 |
48.00 PPF to 72.00 PPF |
|
16 |
65.00 PPF to 109.00 PPF |
|
18-5/8 |
87.50 PPF |
|
20 |
94.00 PPF to 133.00 PPF |
Size table of tubing
|
Outside Diameter (Inches) |
Corresponding Poundage (Pounds Per Foot) |
|
1.050 |
1.14 PPF to 1.54 PPF |
|
1.315 |
1.70 PPF to 2.24 PPF |
|
1.660 |
2.09 PPF to 3.07 PPF |
|
1.900 |
2.40 PPF to 5.15 PPF |
|
2.063 |
3.24 PPF to 4.50 PPF |
|
2-3/8 |
4.00 PPF to 7.45 PPF |
|
2-7/8 |
6.40 PPF to 11.50 PPF |
|
3-1/2 |
7.70 PPF to 17.00 PPF |
|
4 |
9.50 PPF to 22.20 PPF |
|
4-1/2 |
12.60 PPF to 26.10 PPF |
