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Home > Steel Pipe > ERW Steel Pipe > ERW Casing & Tubing Pipe
API 5CT OCTG CASING & TUBING
API 5CT OCTG CASING & TUBING API 5CT OCTG CASING & TUBING API 5CT OCTG CASING & TUBING API 5CT OCTG CASING & TUBING API 5CT OCTG CASING & TUBING API 5CT OCTG CASING & TUBING API 5CT OCTG CASING & TUBING API 5CT OCTG CASING & TUBING API 5CT OCTG CASING & TUBING
  • API 5CT OCTG CASING & TUBING
  • API 5CT OCTG CASING & TUBING
  • API 5CT OCTG CASING & TUBING

API 5CT OCTG CASING & TUBING

OCTG is the acronym for Oil Country Tubular Goods. OCTG is tube and pipe which is used in the production of oil and gas. This pipe is used both onshore and offshore for the production of oil and gas.
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Description Dimensions
Description
API 5CT OCTG CASING & TUBING
SPECIFICATIONS:
 API 5CT steel casing pipe specifications
Range of Sizes: 5 1/2” to 20”
Length: R2, R3
Ends Type: BTC (Buttress Thread Coupling), LTC (Long Buttress Thread Coupling), Premium connection.
 API 5CT OCTG tubing pipe specifications
Tubing range of Sizes: 1.05”, 1.315”, 1.66”, 1.9”, 2 3/8”, 3 1/2” and 4 1/2”
Length of the Tubing in API 5CT Spec: R2, R3
Ends Type: BTC, UN, EUE, Premium ends that could completely replace the tubing premium connection of Vam, Tenaris, Hunting, TSH etc.

APPLICATIONS OF API 5CT OCTG Casing and Tubing 
    Casing pipe is used for lining the borehole which has been dug into the ground for procuring oil or gas and stabilizing it. A casing pipe is subject to axial tensions and high internal pressures which are generated while pumping oil or gas. 
    Tubing pipe is pipe which is placed inside the wellbore through the casing pipe. It is responsible for the transportation of the hydrocarbons to the surface. Tubing pipe is used for transporting natural gas or crude oil after the drilling is complete. It transports the gas and oil to the facilities for further processing.

PRODUCTION STANDARDS & GRADE
Standard: API 5CT
Grades: J55,K55, N80-1, N80Q, C90, T95, P110, Q125

API 5CT CASING AND TUBING TOLERANCE 
API 5CT DIMENSIONAL DEVIATION
Items Allowable Deviation
Out Diameter D ≤ 101.60mm ± 0.79mm
D ≥ 114.30mm + 1.0%, -0.5%
Wall Thickness - 12.5%
Mass (Single Lengths) +6.5%, -3.5%
 
LENGTH RANGE OF API 5CT
Length
Item Scope 1 Scope 2 Scope 3
Tubing 6.10-7.32m 8.53-9.75m –
Casing 4.88-7.62m 7.62-10.36m 10.36-14.63m

DESTRUCTIVE & NON-DESTRUCTIVE TESTING:
Hydrostatic testing 100% of pipe shall be tested. Pipe must be able to survive a hydrostatic test without leaking through the weld seam or the pipe body
NDT Weld seam of each pipe shall be tested by online Eddy Current test
Flattening Test（0 & 90 deg） i) No opening of the weld before the distance between the plates specified in
above table.

 ii) No evidence of lamination or burnt metal shall develop during the flattening
 until opposite wall of the pipe meet.
Drift Test : Each length of pipe shall be drift tested throughout its entire length.
Charpy V Notch Grades H40, J55 & K55 Type 1:There is no mandatory CVN impact requirement.


Dimensions
DIMENSIONS AND SIZES OF API 5CT TUBING
DN O. D. Weight W. T. Type of End-finish
Non-upset coupling-thread Upset coupling-thread
in mm lb./ft. lb./ft. in mm H40 J55 L80 N80 C90 T95 P110
2 3/8 2.375 60.32 4 – 0.167 4.24 PU PN PN PN PN PN –
4.6 4.7 0.19 4.83 PNU PNU PNU PNU PNU PNU PNU
5.8 5.95 0.254 6.45 – – PNU PNU PNU PNU PNU
6.6 – 0.295 7.49 – – P – P P –
7.35 7.45 0.336 8.53 – – PU – PU PU –
2 7/8 2.875 73.02 6.4 6.5 0.217 5.51 PNU PNU – – – – –
7.8 7.9 0.276 7.01 – – – – – – –
8.6 8.7 0.308 7.82 – – PLB PLB PLBE – PLB
9.35 9.45 0.34 8.64 – – PLB PLB PLBE – PLB
10.5 – 0.392 9.96 – – PLB PLB PLB – PLB
11.5 – 0.44 11.18 – – – – PLB –
3 1/2 3.5 88.9 7.7 – 0.216 5.49 PN PN PN PN PN PN –
9.2 9.3 0.254 6.45 PNU PNU PNU PNU PNU PNU PNU
10.2 – 0.289 7.34 PN PN PN PN PN PN –
12.7 12.95 0.375 9.52 – – PNU PNU PNU PNU PNU
14.3 – 0.43 10.92 – – P – P P –
15.5 – 0.476 12.09 – – P – P P –
17 – 0.53 13.46 – – P – P P –
4 4 101.6 9.5 – 0.226 5.74 PN PN PN PN PN PN –
– 11 0.262 6.65 PU PU PU PU PU PU –
13.2 – 0.33 8.38 – – P – P P –
16.1 – 0.415 10.54 – – P – P P –
18.9 – 0.5 12.7 – – P – P P –
22.2 – 0.61 15.49 – – P – P P –
4 1/2 4.5 114.3 12.6 12.75 0.271 6.88 PNU PNU PNU PNU PNU PNU –
15.2 – 0.337 8.56 – – P – P P –
17 – 0.38 9.65 – – P – P P –
18.9 – 0.43 10.92 – – P – P P PLB
21.5 – 0.5 12.7 – – P – P P PLB
23.7 – 0.56 14.22 – – P – P P PLB
26.1 – 0.63 16 – – P – P P PLB
P——Plain；N—— Non-upset coupling-thread；U—— Upset coupling-thread； L——Integral