API 5CT Casing Pipes Marking requirements and sequence

Marking sequence

Mark or symbol¹³

Stencil and/or stamp marking requirements ^a

Groups 1 and 3

Groups 2 and 4

Pipe and pup-joints

Couplings

and

accessories

Pipe and pup-joints

Couplings

and

accessories

1

2

3

4

5

6

7

1

Manufacturer's name or mark

DorP

D or P

P

P

2

ISO specification marking plus compatible standard at manufacturer's option or as specified on purchase agreement. Inclusion of “APNn marking is at manufacturer's option.

Date of manufacture as in 11.1.8 or 11.1.9.

ISO 11960 API 5CT

D or P

D or P

P

P

3

Unthreaded pipe or special end finish, if applicable (place symbol after specification marking):

—Unthreaded pipe either upset or non-upset —Pipethreaded with special end finish —Completed couplings or completed accessories with special end finish

UF

SF

SF

D or P DorP

D or P

P

P

P

4

Size designation (fill in Label 1 designation from column 1 of Table C.1, C.2or C.3)

P

P

5

Mass designation

(fill in Label 2 designation from column 2 of Table C.1, C.2 or C.3)

DorP

P

6

Grade of pipe

H40

J55

K55

N80 Type 1

N80Q

M65

L80

P110

C95

L80 Type9Cr

L80 Type13Cr

C90 Typel

C90 Type2

T95 Typel

T95 Type2

Q125 Typel

Q125 Type2

Q125 Type3

Q125 Type4

All grade designations

H

J

K

N1

NQ

M

L

P

C

L9

L13

C90-1

C90-2

T95-1

T95-2

Q1

Q2

Q3

Q4

D or P

D or P

P

P

7

Reduced alternative impact test temperature, if applicable. Fill in specified test temperature for full-size specimens, Including 土symbol and ⁰C

…C

P

P

P

P

8

Heat treatment, if applicable:

—J55,K55 or M65 normalized —J55, K55 or M65

2

Q

P

P

P , P

P

P

P

P

9

Process of manufacture 一Seamless —Electric-welded All designations

S

E

,D or P

P

10

Supplementary requirements, if applicable:

A.1 (SR1)

A.2 (SR2)

A.3(SR9) (fill in type)

A.7 (SR13)

A.9 (SR16) (fill in minimum full-size energy absorption requirement, in joules, and test temperature including 士 symbol and °C)

51

52

S9Q• S13…"

S16…C

P

P

P

D or P

P

P

P

P

P

11

Hydrostatic test pressure ^d (fill in the actual test pressure, in MPa) All designations

P"…

P

P

Marking sequence

Mark or symbol ^b

Stencil and/or stamp marking requirements ^a

Groups 1 and 3

Groups 2 and 4

Pipe and pup-joints

Couplings

and

accessories

Pipe and pup-joints

Couplings

and

accessories

1

2

3

4

5

6

7

12

Type of thread, if applicable:

—Formanufacturers, processors or threaders of casing

buttress, extreme-line or round threads

(fill in type of thread from Table C.66)

P

P

—Forthreaders of tubing threads (fill in type of thread

from Table C.66)

P

P

13

Full-length drift test, if applicable:

一Standard (casing or tubing)

D

一Alternative (casing or tubing) where «xx» is

the size of the alternative drift

DAxx

For casing specified for tubing service and drift tested in

accordance with 8.10

DT42

All designations

P

P

14

Serialization of Grades C90, T95 and Q125

Dc〇rP

Dc〇_rp

15

Tin plating of couplings, if applicable

T

P

P

16

Couplings H40, J55 and K55 only visually inspected

V

P

NOTE

See 11.4 for mandatory colour code requirements.