Product name: API 5CT Seamless Steel Casing PipeSteel Grade: H40,J55, K55,M65,L80, R95, N80 Type 1, N80 Type Q, C90,T95,C110, P110,Q125Standard: API 5CT Outer Diameter: 4-1/2"~20" (114.3-508mm) Thickness: 5.21 - 16.13 mmTechnique: Cold Drawn/Hot Rolled Application: Oil Country Tubular Goods, Piling, Casing, Tubing Place of Origin: China (Mainland)Certification: API 5CT, API 5L, API 5B, API Q1Pipe Factory: TPCO, VALIN, BAOTAO, Baoshan etcNOTE: OCTG casing to suit Coupled; Semi-Flush and Flush connections, with casing ID to suit your poundage (including special clearance couplings & special drift ID).
Casing range length:Range 1: 16ft ~ 25ft (4.88M~7.62M)Range 2: 25ft ~ 34ft (7.62M~10.36M)Range 3: 34ft ~ 48ft (10.36M~14.63M)
API Spec 5CT - Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells
This product references:
API Spec 5B - Specification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Threads (US Customary Units) (Includes March 2004 Addendum)
ISO 10422:1993 - Petroleum and natural gas-industries; threading, gauging, and thread inspection of the casing, tubing, and threads; specification
This product replaces:
API 5CT - Specification for Casing and Tubing (U.S. Customary Units)
ISO 11960 was prepared by Technical Committee ISO/TC 67, Materials, equipment, and offshore structures for petroleum, petrochemical, and natural gas industries, Subcommittee SC 5, Casing, tubing, and drill pipe.
Chemical compositions of casing pipe
| Grade | Type | Total elongation under load (%) | Yield strength (min)Mpa | Yield strength (max)Mpa | Tensile strength min Mpa | Hardness Max (HRC) | Hardness Max (HBW) |
| 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 | - | - |
| 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 | - | 0.5 | 621 | 724 | 689 | 25.4 | 255 |
| C95 | - | 0.5 | 655 | 758 | 724 | - | - |
| T95 | - | 0.5 | 655 | 758 | 724 | 25.4 | 255 |
| P110 | - | 0.6 | 758 | 965 | 862 | - | - |
| Q125 | All | 0.65 | 862 | 1034 | 931 | - | - |
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