Tubing, Casing and Line Pipes

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Tubing and casing strings designed for the specific requirements for conveying gaseous media and combustible liquids or solids.
All wells drilled for the purpose of oil or gas production (or injecting materials into underground formations) must be cased with material with sufficient strength and functionality.


API5L Steel pipe for pipeline transportation system

Peotroleum and natureal gas industies - Steel pipe for pipeline transportation system.


API Spec 5CT Casing pipe

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.



API 5CT Steel pipes for use as Casing and Tubing

API5CT Peotroleum and natureal gas industies - Steel pipes for use as casing or tubing for wells.
Mill Test Certificate: EN 10204/3.1B 



Tubing with Threaded Non-Upset/Upset End and Coupling



Offshore Pipeline



Geological Drilling Pipe

Geological tube is steel pipe that using core drilling for the geological department, which a hollow cross section, surrounded by long geological drilling joints with steel pipes.


Oil Country Tubular Goods (OCTG)

Oil country tubular goods (OCTG) is a family of seamless rolled products consisting of drill pipe, casing and tubing subjected to loading conditions according to their specific application.


Select differences between PSL 1 and PSL 2
This is summarized information from API Specification 5L.
 DataPSL1PSL2
CVN impact (Charpy) testingNone requiredRequired for all grades
Nondestructive inspection of seamlessOnly when purchaser specifies   SR4SR4 mandatory
CertificationCertificates when specified per SR15Certificates (SR 15.1) mandatory
TraceabilityTraceable only until all tests are passed, unless SR15 is specifiedTraceable after completion of tests (SR 15.2) mandatory
Hydrostatic TestRequired    Required
Note: Please refer to the specific Standard or Specification or contact us for more details.
API Spec 5CT
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.
The main steel grade of API 5CT:
  • API 5CT J55
  • API 5CT K55
  • API 5CT N80
  • API 5CT L80
  • API 5CT P110
Chemical Composition
GradeC≤Si≤Mn≤P≤S≤Cr≤Ni≤Cu≤Mo≤V≤Als≤
API 5CT J550.34-0.390.20-0.351.25-1.500.0200.0150.150.200.20//0.020
API 5CT  K550.34-0.390.20-0.351.25-1.500.0200.0150.150.200.20//0.020
API 5CT N800.34-0.380.20-0.351.45-1.700.0200.0150.15///0.11-0.160.020
API 5CT  L800.15-0.221.000.25-1.000.0200.01012.0-14.00.200.20//0.020
API 5CT J P1100.26-0350.17-0.370.40-0.700.0200.0100.80-1.100.200.200.15-0.250.080.020
Mechanical Properties of API 5CT
Steel GradeYield Strength (Mpa)Tensile Strength (Mpa)
API 5CT J55379-552≥517
API 5CT K55≥655≥517
API 5CT N80552-758≥689
API 5CT L80552-655≥655
API 5CT P110758-965≥862
API Spec 5CT standard replaced by:
  • 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 Line Pipe Threads (US Customary Units) (Includes March 2004 Addendum)
  • ISO 10422:1993 – Petroleum and natural gas-industries; threading, gauging, and thread inspection of casing, tubing and line pipe 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.

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