API 5CT J55/K55/N80/L80-1/L80-9Cr/L80-13Cr/P110/Q125/K55 D10/L80 D10 Casing Pipe OCTG

API 5CT J55 / K55 Casing Pipe OCTG

 

Grades:

API 5CT J55/K55/N80/L80-1/L80-9Cr/L80-13Cr/P110/Q125/K55 D10/L80 D10

Sizes:

Diameter :from 4 1/2 inch  to 20 inch  （48.26mm - 508mm)

 

Nominal Weight: from 9.5 lb/ft  to 169 lb/ft

from 9.5 ppf  to 169 ppf

Length: R1, R2, R3

Types:

Seamless casing

ERW casing

Casing nipple

Casing coupling

Coating

3PP Coating3PE CoatingFBE CoatingEpoxy CoatingSpecial Painting

Applications: 

oil well extracting casing
borehole casing
borewell casing

Connection: 

BTC, STC, LTC, NUE, EUE

Dimension Tolerance of casing pipe

Types of steel tubesOuter DiameterWall Thickness
Cold-rolled tubesTube sizes(mm)Tolerances(mm)Tolerances(mm)
＜114.3±0.79－12.5％
≥114.3－0.5％，＋1％

Chemical Composition of casing pipe

StandardGradeChemical compositions（％）
API SPEC 5CTJ55CSiMnPSCrNiCuMoV
K550.34～0.390.20～0.351.25～1.50≤0.020≤0.015≤0.15≤0.20≤0.20//
N800.34～0.380.20～0.351.45～1.70≤0.020≤0.015≤0.15///0.11～0.16
L800.15～0.22≤1.000.25～1.00≤0.020≤0.01012.0～14.0≤0.20≤0.20//
P1100.26～0.3950.17～0.370.40～0.70≤0.020≤0.0100.80～1.10≤0.20≤0.200.15～0.25≤0.08

Mechanical properties of casing pipe

GradeTypeTotal elongation under load (%)Yield strength (min)Yield strength (max)Tensile strength min MpaHardness Max (HRC)Hardness Max

(HBW)

J55-0.5379552517--
K55-0.5379552655--
N8010.5552758689--
N80Q0.5552758689--
L8010.555265565523241
L809Cr0.555265565523241
L8013Cr0.555265565523241
C90-0.562172468925.4255
C95-0.5655758724--
T95-0.565575872425.4255
P110-0.6758965862--
Q125All0.658621034931--