OCTG Casing and Tubing Pipe

Short Description:

Bestar Steel offers a complete range of API 5CT casing and tubing for all types of oil exploration and production demands. The material includes carbon steel (for the most common use), alloy, chrome and high alloy steels. API 5CT grades cover J55 / K55, N80 type 1 and N80Q, L80, C90, T95, P110, Q125, and with additional requirements of 13 Cr.


Product Detail

Product Tags

Supply Range

Bestar Steel supplies API 5CT casing pipes with the following sizes and specifications:
Standard and Grades: API 5CT J55 / K55, N80-1, N80Q, C90, T95, P110, Q125 and 13Cr
Casing Pipe Size range: 5 1/2” to 20” Length usually in R3.
Tubing Pipe dimensions range: 1.0”, 1.315”, 1.66”, 1.9”, 2.063”, 2 3/8”, 3 1/2”and 4 1 /2”, Length in R2.
Type of connections for Casing: BTC (thread coupling buttress), LTC (long round thread coupling), premium connection.
Types of connections for Tubing: BTC, NUE, EUE, Premium

Chemical compositions of casing pipe

Standard

Grade

Chemical compositions(%)

API SPEC 5CT

J55

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

V

K55

0.340.39

0.200.35

1.251.50

≤0.020

≤0.015

≤0.15

≤0.20

≤0.20

/

/

N80

0.340.38

0.200.35

1.451.70

≤0.020

≤0.015

≤0.15

/

/

/

0.110.16

L80

0.150.22

≤1.00

0.251.00

≤0.020

≤0.010

12.014.0

≤0.20

≤0.20

/

/

P110

0.260.395

0.170.37

0.400.70

≤0.020

≤0.010

0.801.10

≤0.20

≤0.20

0.150.25

≤0.08

Mechanical properties of casing pipe

Grade

Type

Total elongation

under load

 (%)

Yield strength

 (min)Mpa

Yield strength

(max)Mpa

Tensile strength

min Mpa

Hardness

Max (HRC)

Hardness

Max (HBW)

J55

-

0.5

379

552

517

-

-

K55

-

0.5

379

552

655

-

-

N80

1

0.5

552

758

689

-

-

N80

Q

0.5

552

758

689

-

-

L80

1

0.5

552

655

655

23

241

L80

9Cr

0.5

552

655

655

23

241

L80

13Cr

0.5

552

655

655

23

241

C90

-

0.5

621

724

689

25.4

255

C95

-

0.5

655

758

724

-

-

T95

-

0.5

655

758

724

25.4

255

P110

-

0.6

758

965

862

-

-

Q125

All

0.65

862

1034

931

-

-

Color Codes for API 5CT Casing and Tubing

color casing

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