API 5CT J55 Casing Pipe


  • Outer Dimensions: 6.0mm -219.0mm
  • Wall Thickness: 1.0mm -30 mm
  • Length: R1(4.88-7.62m), R2(7.62-10.36m), R3(10.36-14.63m)
  • Thread type: Short round thread, Long round thread, Buttress thread
  • J55 Casing Tubing Steel Color Code: a bright green band
  • J55 Coupling Color Code: entire green coupling + a white band
  • Application: Transportation of gas, water, oil and natural gas.

API 5CT is a specification for casing and tubing for petroleum and natural gas industries-used for wells. This Standard specifies the technical delivery conditions for steel pipes (casing, tubing and pup joints), coupling stock, coupling material and accessory material and establishes requirements for three Product Specification Levels (PSL-1, PSL-2, PSL-3). Grade J55 Casing Tubing is an API 5CT oil casing pipe and mostly utilized for oil well with varied end connections such as non-Upset ends or an external upset end.

The API J55 casing and tubing have wide application used in the shallow wells, geothermal wells, and water wells in the natural gas and coalbed methane due to its lower price relatively. WLD steel is a leading API 5CT casing and tubing manufacturer and supplier, we provide not only a broad range of API 5CT J55 oilfield casing pipe and API 5CT J55 tubing but also casing coupling, perforated pipe and more.

API 5CT J55 Chemical Composition

Grade C Si Mn P S Cr Ni Cu Mo
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 /

API 5CT J55 Mechanical Property

Steel Grade Yield Strength (Mpa) Tensile Strength (Mpa) Total elongation under load %
API 5CT J55 379-552 ≥517 0.5

API 5CT J55 Tolerance

Item Allowable tolerance
Outer diameter Pipe body D≤101.60mm±0.79mm
Wall thickness -12.5%
Wight Single piece +6.5%+3.5%
Total weight -1.75


API 5CT J55 Size Chart

Outer Diameter Wall Thickness Weight Grade Threaded Length
in mm kg/m lb/ft
4 1/2″ 114.3 14.14-22.47 9.50-11.50 J55 LTC/STC/BTC R1/R2/R3
5″ 127 17.11-35.86 11.50-24.10 J55 LTC/STC/BTC R1/R2/R3
5 1/2″ 139.7 20.83-34.23 14.00-23.00 J55 LTC/STC/BTC R1/R2/R3
6 5/8″ 168.28 29.76-35.72 20.00-24.00 J55 LTC/STC/BTC R1/R2/R3
7″ 177.8 25.30-56.55 17.00-38.00 J55 LTC/STC/BTC R1/R2/R3
7 5/8″ 193.68 35.72-63.69 24.00-42.80 J55 LTC/STC/BTC R1/R2/R3
8 5/8″ 219.08 35.72-72.92 24.00-49.00 J55 LTC/STC/BTC R1/R2/R3
9 5/8″ 244.48 48.07-86.91 32.30-58.40 J55 LTC/STC/BTC R1/R2/R3
10 3/4″ 273.05 48.73-97.77 32.75-65.70 J55 LTC/STC/BTC R1/R2/R3
11 3/4″ 298.45 62.50-89.29 42.00-60.00 J55 LTC/STC/BTC R1/R2/R3
13 3/8″ 339.72 71.43-107.15 48.00-72.00 J55 LTC/STC/BTC R1/R2/R3