Seamless steel tubes for oil casing and tubing, Casing, Tubing, Seamless pipes

Seamless steel tubes for oil casing and tubing

Seamless steel tubes for oil casing and tubing application for onshore and offshore Oil & Gas applications in the domains of Exploration, Production and Processing.

Standard：

API SPEC 5CT Standard of American Petroleum Institute

Application:

Seamless steel tubes for oil casing and tubing in oil wells

Model N0．of steel tubes:

J55，N80，L80，P110 etc．

Diamensional tolerances:

Types	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％

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Note:
This inventory is part of the inventory, demand and other models in stock or order materials, please contact us.

This International Standard specifies the technical delivery conditions for steel pipes (casing, tubing, plain end casing liners and pup-joints) and accessories. This International Standard is applicable to the following connections in accordance with ISO 10422 or API Spec 5B:: - short round thread casing (STC);; - long round thread casing (LC);; - buttress thread casing (BC);; - extreme-line casing (XC);; - non-upset tubing (NU);; - external upset tubing (EU);; - integral joint tubing (IJ).
For such connections, this International Standard specifies the technical delivery conditions for couplings and thread protection.
For pipes covered by this International Standard, the sizes, masses, wall thicknesses, grades and applicable end finishes are defined.
This International Standard may also be applied to tubulars with connections not covered by ISO/API standards.

Mechanical properties:

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

Chemical composition:

Standard codes

Models of steel tubes

Chemical compositions (%)

Als

API SPEC 5CT

J55K55

(37Mn5)

0.34～0.39

0.20～0.35

1.25～1.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.020

N80

(36 Mn2V)

0.34～0.38

0.20～0.35

1.45～1.70

≤0.020

≤0.015

≤0.15

0.11～0.16

≤0.020

L80(13Cr)

0.15～0.22

≤1.00

0.25～1.00

≤0.020

≤0.010

12.0～14.0

≤0.20

≤0.020

P110

(30CrMo)

0.26～0.35

0.17～0.37

0.40～0.70

≤0.020

≤0.010

0.80～1.10

≤0.20

0.15～0.25

≤0.08

≤0.020

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