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  4. API 5CT K55 Casing
  • API 5CT K55 Casing
  • API 5CT K55 Casing
API 5CT K55 Casing API 5CT K55 Casing

API 5CT K55 Casing

  • Product Item:OD: 4 1/2
  • WT: 0. 205
  • Length: R1(4.88mtr-7.62mtr), R2(7.62mtr-10.36mtr), R3(10.36mtr or longer)
  • Connection: Casing: LTC, STC, BTC, VAM. Tubing: NUE, EUE.
  • Standard & Grade : API 5CT, SY/T 6194, BS EN ISO 11960, NF M87-207, JIS G3439, IS:4270, H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95, P110, Q-125
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    Description
    Pipe Process of API 5CT K55 Casing
    Round Pipe →  pipe inspection  → NDT inspection MPI → End Threading → Thread Inspection → Coupling Threading lnspection  → NDT inspection MPI ( coupling) → Phosphating (for coupling) → Coupling power Make up → Hydrostatic test → Drift test → Doping and Protectors Application  → Coating  → Measurement of  Length and Weight → Colour Identification → Marking → Packing → Warehousing

    ASTM /ASME

    Product Name

    Executive Standard

    Dimension (mm)

    Steel Code / Steel Grade

    CASING AND TUBING

    API 5CT

    Casing:OD 4 1/2"- 20" (114.3mm-508mm) Tubing:OD 2 3/8" - 4 1/2" (60.3mm-114.30mm)

    WT: 0. 205"- 0.635"

    H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95, P110, Q-125

    Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells

    SY/T 6194 / BS EN ISO 11960 / NF M87-207

    Casing:OD 4 1/2"- 20" (114.3mm-508mm) Tubing:OD 2 3/8" - 4 1/2" (60.3mm-114.30mm)

    WT: 0. 205"- 0.635"

    H-40, J55, K-55, N-80, N80Q, C-75, L-80, C-90, T-95, P110, Q-125

    SEAMLESS STEEL OIL WELL CASING, TUBING AND DRILL PIPE

    JIS G3439

    Casing:OD 4 1/2"- 20" (114.3mm-508mm) Tubing:OD 2 3/8" - 4 1/2" (60.3mm-114.30mm)

    WT: 0. 205"- 0.635"

    STO-H, STO-J, STO-D, STO-E

    Application of API 5CT Q125 Casing and Tubing:
    According to API 5CT standard, steel material used for making the pipe billet supplied shall be grain refining treatment. This steel shall contain one or more grain refining elements, such as a certain amount of aluminum, niobium, vanadium or titanium, so that the austenite grains of the steel Grain refinement.
    • Pipes supplied shall be manufactured in seamless type or EW type.
    • Couplings, coupling stock and coupling materials shall be in seamless.
    • Cold drawn tubing pipe shall be properly heat treated, otherwise is not acceptable.
    • Casing and tubing attachment materials shall be seamless pipe, unless other type stated on the order.
    API 5CT is standard technical specifications for steel casing and tubing pipes used for oil wells in petroleum and natural gas industries.
    Besides casing and tubing, it also includes pup joints, coupling stock, coupling material, and accessory materials, and establishes requirements for three product specification levels (PSL-1, PSL-2, and PSL-3). The requirements for PSL-1 are the basis of this standard.
    Connections
    API 5CT is applicable to following connections which complied with API SPEC 5B:
    • SC: Short round thread casing
    • LC: Long ound thread casing
    • BC: Buttress thread casing
    • NU: Non-upset tubing
    • EU: External upset tubing
    • IJ: Integral tubing connections
    Groups of Grade
    • Group 1: All casing and tubing in Grades with H, J, K, N and R
    • Group 2: All casing and tubing in Grades with C, L, M and T
    • Group 3: All casing and tubing in Grade P
    • Group 4: All casing in Grade Q

    Heat Treatment
    Heat treatment methods for API 5CT casing and tubing is an important factor to differ each grade. Products requiring heat treatment shall be subjected to full body and full length heat treatment. The heat-treated upsetting product should be heat treated full body, full length after upsetting.
    A separately heat treated coupling blank is acceptable. If the finishing temperature is higher than the upper critical temperature of the treated steel and the pipe is air cooled, it shall be considered to be normalized.
    in case of welding type, weld seam shall be heat treated to a minimum temperature of 540 ℃(1000°F), or a certain treatment method shall be used to make the no untempered martensite structure in the weld.
    N80 Type 1 and Type Q
    Steel grade N80 type 1 products shall be normalized or normalized and tempered at the option of the manufacturer.
    N80Q steel grade products shall be quenched and tempered.
    R95
    R95 steel grade shall be quenched and tempered.
    L80
    When tempered at temperatures below 620 ℃(1150°F) , and grade L80 grade 13 Cr may be embrittled.
    Straightening
    R95
    R95 casing and tubing shall not be stretched or expanded cold working after final tempering, except for cold working which is necessary for normal straightening and not more than 3% of compression cold working.
    M65 and L80
    Except for the cold working required for normal straightening, steel grade M65 and L80 products shall not be cold worked after final heat treatment.
    C90 and T95
    C90 and T95 products can be cold-rotated straightened, but the pipe must be heated to a minimum temperature of 480 ℃(1000°F) degrees for stress relief after straightening. If necessary, light gag straightening for steel grade C90 and T95 products are allowed.
    C110
    If necessary, the product shall be cold-rotated straightened and subsequently stress-relieved at temperatures between 30℃to 55℃ (50°F to 100 °F) below the final specified tempering temperature, or hot-rotated straightened at temperatures not more than 165℃ (300°F) below the final specified tempering temperature of . If necessary, it is allowed to do light gag straightening.
    Q125
    Gag-press straightening or hot-rotating straightening can be performed for straightening , but the temperature at the end of the rotary straightening should not be less than 400 ℃ (750°F) (unless a higher temperature minimum is specified on the order). If the hot rotary straightening method cannot be used, the product can also be cold-rotated straightened, but the stress relief must be performed at 510 ℃ (950°F) after straightening. Product can not be subjected to stress relief after cold rotary straightening only by agreement between the purchaser and the manufacturer.
    Chemical Composition in API 5CT Specification
    The product shall comply with the requirements specified in the chemical composition table for the specified steel grade and type. For the C110 steel grade, the manufacturer shall report when the purchaser asks for the lowest and highest ratios of all elements intentionally added to each batch (regardless of the purpose of its addition).


    Tensile Properties
    The product shall meet the tensile performance requirements specified in this standard. The tensile properties of the upset casing and tubing (except for elongation) shall be consistent with the requirements of the pipe body. In case of dispute, the properties of the upset area (except for the elongation) shall be determined by cutting the specimen from the upset.


    Dimensions and Masses
    The pipe shall be supplied in accordance with the sizes, wall thickness and tolerance masses specified on the order. Other plain end pipe sizes and wall thicknesses are available upon purchase and manufacturer agreement. Coupling stock, coupling materials and accessory materials shall be supplied in the required size of the order, or the size of the coupling material shall be as specified in the manufacturer’s internal requirements.
    The accuracy of all measuring equipment used for receiving or rejecting shall be verified at least once per operating shift, with the exception of threaded ring gauges, plug gauges and weighing implements.
    According to the provisions of this standard, If a measuring device that is calibrated or verified is subjected to abnormal or severe conditions sufficient to affect its accuracy, it should be re-calibrated or re-verified before further used.


    Outside diameter tolerances
    Below tolerances apply to the outside diameter, D, of casing and tubing:



    For upset integral tubing connection
    Following tolerances apply to the outside diameter of the pipe body immediately behind the upset for a distance of approximately 127 mm (5.0 in) for sizes Label 1: 5-1/2 and smaller, and a distance approximately equal to the outside diameter for sizes larger than Label 1: 5-1/2. Measurements shall be made with callipers or snap gauges.


    Wall thickness
    Tolerance for casing and tubing wall thickness is -12.5%.


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      • API 5L GR.X60 seamless steel pipe
      • API 5L GR.X65 seamless steel pipe
      • ASTM A106 GR.B Seamless steel pipe
      • ASTM A179 Boiler tube
      • ASTM A192 heat ex changer tube
      • ASTM A210/A210M Seamless bolier tube
      • ASTM A519 Seamless steel pipe
      • EN10210 Seamless steel pipe
      • EN10216 Structural Steel Pipe
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      • ASTM A 519 4145 seamless steel tubes
      • ASTM A 519 4130 seamless steel tubes
      • ASTM A 519 1026 seamless steel tubes
      • ASTM A 519 1045 seamless steel tubes
      • ASTM A 519 1020 seamless steel tubes
    • Stainless Steel pipe
      • ASTM A 312 304 Stainless Steel tubes
      • ASTM A 312 304L Stainless Steel tubes
      • ASTM A 312 310S Stainless Steel tubes
      • ASTM A 312 316 Stainless Steel tubes
      • ASTM A 312 316L Stainless Steel tubes
      • ASTM A 312 316Ti Stainless Steel tubes
      • ASTM A 312 317 Stainless Steel tubes
      • ASTM A 312 317L Stainless Steel tubes
      • ASTM A 312 347 Stainless Steel tubes
      • ASTM A 312 347H Stainless Steel tubes
      • ASTM A 312 321 Stainless Steel tubes
      • ASTM A 312 410 Stainless Steel tubes
      • ASTM B673, B677, B674 904L Stainless Steel tubes
      • ASTM A790 Duplex Steel S31803 tubes
      • ASTM A790 Duplex Steel S32205 tubes
    • Coating pipe
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      • 3LPE coating steel pipe
      • 3LPP coating steel pipe
      • FBE Coating steel pipe
      • INTERZONE 954 epoxy Coating steel pipe
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    • Casing and Tubing
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      • API 5CT P110 Casing and Tubing
      • API 5CT Q125 Casing and Tubing
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      • Reducer
      • Bends
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      • Stub end
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