Tubing, Casing and Line Pipes

Tubing and casing strings designed for the specific requirements for conveying gaseous media and combustible liquids or solids.

Packing oil pipe

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.

Seamless API pipes
+ API 5L SSAW Pipe
API Spec 5CT Casing pipe
+ Seamless steel tubing

+ API 5L LSAW Pipe
API X70
API5L Steel pipe for pipeline transportation system
Peotroleum and natureal gas industies - Steel pipe for pipeline transportation system.

Surface Treatment: 5L – Uncoated(bare), Temporary coating, Special coating, Oil-dip, Shot Blasting, Varnish

API5L Steel pipe for pipeline transportation system

API Spec 5CT Casing pipe

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.

J55 and N80 are a common part of the oil casing material. However, these two materials are some differences.

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.

Standard Line Pipe has grade designation A and B. Stronger grades have the designation X followed by the specified minimum yield strength of the pipe steel, measured in kilopounds per square inch (abbreviated ksi), e.g.

Mill Test Certificate: EN 10204/3.1B 

API5L Steel pipe for pipeline transportation system

Drill Pipes with Welded-on Tool-Joints/ Threaded End

Tubing with Threaded Non-Upset/Upset End and Coupling

Once the tubular size and setting depths are determined, the wall thickness and grade of material are then chosen by the well designer to ensure the strength is adequate for the expected loads.

Offshore Pipeline

Offshore pipeline is broadly used to transfer considerable amounts of oil pipeline around the seabed through the closed tubes, which are key parts of the offshore oil (gas) area development and production system.

Offshore Pipeline

Oil Country Tubular Goods (OCTG)
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.

 Data

PSL1

PSL2

CVN impact (Charpy) testing

None required

Required for all grades

Nondestructive inspection of seamless

Only when purchaser specifies   SR4

SR4 mandatory

Certification

Certificates when specified per SR15

Certificates (SR 15.1) mandatory

Traceability

Traceable only until all tests are passed, unless SR15 is specified

Traceable after completion of tests (SR 15.2) mandatory

Hydrostatic Test

Required    

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

Grade C≤ Si≤ Mn≤ P≤ S≤ Cr≤ Ni≤ Cu≤ Mo≤ V≤ Als≤
API 5CT J55 0.34-0.39 0.20-0.35 1.25-1.50 0.020 0.015 0.15 0.20 0.20 / / 0.020
API 5CT  K55 0.34-0.39 0.20-0.35 1.25-1.50 0.020 0.015 0.15 0.20 0.20 / / 0.020
API 5CT N80 0.34-0.38 0.20-0.35 1.45-1.70 0.020 0.015 0.15 / / / 0.11-0.16 0.020
API 5CT  L80 0.15-0.22 1.00 0.25-1.00 0.020 0.010 12.0-14.0 0.20 0.20 / / 0.020
API 5CT J P110 0.26-035 0.17-0.37 0.40-0.70 0.020 0.010 0.80-1.10 0.20 0.20 0.15-0.25 0.08 0.020

Mechanical Properties of API 5CT

Steel Grade Yield Strength (Mpa) Tensile Strength (Mpa)
API 5CT J55 379-552 ≥517
API 5CT K55 ≥655 ≥517
API 5CT N80 552-758 ≥689
API 5CT L80 552-655 ≥655
API 5CT P110 758-965 ≥862

API Spec 5CT standard replaced by:

Seamless steel tubes for oil casing and tubing in oil wells

Model N0.of steel tubes:

J55,N80,L80,P110 etc.

This International Standard specifies the technical delivery conditions for steel pipes (casing, tubing, plain end casing liners and pup-joints) and accessories.

API SPEC 5L
PSL C, a    Mna P        S  Si V Nb

Ti

Other CEIIW CEpcm
1 0.24 1.40 0.025 0.015 0.45 0.10 0.05 0.04 b,c .043 0.025
2 0.28 1.40 0.03 0.03 - b b b - - -

API SPEC 5L is a international standard specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.




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