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Tubing, Casing and Line Pipes

Tubing and casing strings are the main parts of the well construction. 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.
API 5L Line Pipe ( API 5L / API 5L )
Packing oil pipeAPI 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.

+ Steel pipes Specifications and Execution Standard
 
API5L Steel pipe for pipeline transportation system
API5L Steel pipe for pipeline transportation system Peotroleum and natureal gas industies - Steel pipe for pipeline transportation system.
API5L Steel pipe for pipeline transportation system
API5L Steel pipe for pipeline transportation systemAPI5CT Peotroleum and natureal gas industies - Steel pipes for use as casing or tubing for wells.
Line Pipe with Plain End and Beveled
Line Pipe with Plain End and BeveledThe pipelines, transporting oil, gas, mainly divided into the main transmission pipeline, regional transportation pipeline and the urban pipeline.
Carbon Steel Tubes for General Structural Purposes
Carbon Steel Tubes for General Structural PurposesDIN 2448 Seamless Steel Pipes and Tubes-Dimensions, Conventional Masses per Unit Lengthstandard reference.
Seamless Tubing and Couplings Hydrosulfide-Carbon Dioxide- and Cold-Resistant

Tube type

DN (nominal diam.),
mm

Tube wall thickness,
mm

Outside Diameter of coupling and sub,
mm

Plain as per
GOST 633-80

60
73
89

5.0
5.5 : 7.0
6.5 : 8.0
6,5
7.0

73.0
88.9
108.0
120.6
132.1

The general corrosion rate for metal of tubing, couplings and strengthened connection parts is not more than 0.5 mm/year.
High Longevity Oil-Well Tubing and Interlocks of Production Strings for Corrosive Media
Tube type DN (nominal diam.),
mm
Tube wall thickness,
mm
Outside Diameter of coupling and sub,
mm
Plain as per GOST 633-80 60
73
89
102
114
5.0
5.5 : 7.0
6.5 : 8.0
6.5
7.0
73.0
88.9
108.0
120.6
132.1

The tubes are manufactured in version A per GOST 633-80.
Wear-Resistant Tool Joints for Tubing
Wear-Resistant Tool Joints for Tubing This specification covers the wear-resistant tool joints (interlocks) for tubing per GOST 633-80 that are used in production and process strings.
Drill Pipes with Welded Tool Joints
Drill Pipes with Welded Tool JointsThe drill pipes with welded tool joints are installed in the drilling string and are connected with the kelly bar in the top and with the drill collar and drill bit or tool in the bottom.
API X70 steel pipe
Sunny Steel is specialized in supplying API 5L steel pipe in X70. For more information of API 5L X70 steel pipe, please check them in following:
 Standard  C(%)  Si(%)  Mn(%)  P(%)  S(%)  Nb(%)
 API 5L X70  ≤0.16  ≤0.45  ≤1.70  ≤0.020  ≤0.020  ≤0.06

API 5L X70 steel pipe Surface: Black painted,PE coated,Galvanized,color coated,etc
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.
+ Marine Oil Pipeline Project
+ Marine oil pipeline engineering
+ Marine Seamless Steel Pipe

Inspection and Tests Performed:
5L – Chemical composition, Mechanical properties, Hydrostatic test, Dimensional testing, Visual inspection, Nondestructive inspection
5CT – Chemical composition, Tensile test, Flattening test, Hardness test, Impact test, Grain size determination, Harden ability, Sulfide stress-cracking test, Hydrostatic test, Dimensional testing, Visual inspection, Non-destructive examination(NDE)

Surface Treatment:
5L – Uncoated(bare), Temporary coating, Special coating, Oil-dip, Shot Blasting, Varnish
Size: We supply various line pipes including seamless line pipes
(OD from 2-3/8" to 24", steel grade A, B, X42 - X80)



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Alloy steel is often subdivided into two groups: high alloy steels and low alloy steels. The difference between the two is defined somewhat arbitrarily.

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