Product Details

Oil casing and tubing

Standard:API SPEC 5CT Standard.

Use: Seamless steel tubes for oil casing and tubing in oil and gas well. Casing pipe is the steel pipe to support the wall of oil and gas wells, divided into surface casing, protective casing and production casing.

Steel grade: J55, K55, N80, L80, C90, T95, P110, Q125

Size: 4 1/2”~20” for Seamless Casing

1.05”~4 1/2” for Seamless Tubing

Length: R1/R2/R3

Dimensional tolerances:

Types of steel tubes	Outer diameter		Wall thickness
Cold-rolled tubes	Tube sizes(mm)	Tolerances(mm)	Tolerances(mm)
	<114.3	±0.79	-12.5%
	≥114.3	-0.5%, +1%	-12.5%

Mechanical properties:

Standard	Models of steel tubes	Tensile strength (MPa)	Yield strength (MPa)	Elongation (%)	Hardness
API SPEC 5CT	J55	≥517	379~552	check the table	≤241HB
	K55	≥517	≥655
	N80	≥689	552~758
	L80(13Cr)	≥655	552~655
	P110	≥862	758~965

Chemical Composition:

Standard

Models of steel tubes

Chemical compositions (%)

Als

API SPEC 5CT

J55K55 (37Mn5)

0.34~ 0.39

0.2~ 0.35

1.25~ 1.5

≤0.02

≤0.015

≤0.15

≤0.20

≤0.02

N80 (36 Mn2V)

0.34~ 0.38

0.2~ 0.35

1.45~ 1.7

≤0.02

≤0.015

≤0.15

0.11~ 0.16

≤0.02

L80 (13Cr)

0.15~ 0.22

≤1.0

0.25~ 1.0

≤0.02

≤0.010

12.0~ 14.0

≤0.20

≤0.02

P110 (30CrMo)

0.26~ 0.35

0.17~ 0.37

0.40~ 0.7

≤0.02

≤0.010

0.8~1.1

≤0.20

0.15~ 0.25

≤0.08

≤0.02

Note: Also we can supply you pup joint and coupling (coupling stock and coupling blank) for tubing and Casing, as well as for weld pipe.