- 1.1 This specification covers sesamless and welded steel line pipe. It includes standard-weight and extra-strong threaded line pipe. It includes standard-weight and extra-strong threaded line pipe; and standard-weight plain-end,regular-weight plain-end, special plain-end, extra-strong plain-end, special plain-end, extra-strong plain-end pipe; as as well as bell and spigot and through-the-flowline(TFL) pipe.
- The purpose of this specification is to provide standards for pipe suitable for use in conveying gas, water, and oil in both the oil and natural gas industries.
- 1.2 Dimensional requirements on threads and thread gauges, stipulations on gauging practice, gauge specifications and certification, as well as instruments and methods for inspecition of threads are given in API Standard 5B and are applicable to products covered by this specification.
- Grades covered by this specification are A25, A, B, X42, X46, X52, X56, X60, X65, X70, and X80 and grades intermediate to the Grades X42 and higher listed (see note). The chemical composition and mechanical properties of intermediate grades that are subject to agreement between the purchaser and the menufacturer must be consistent with the corresponding requirements for the grades to which the material is intermediate.
Note :- The grade disignations used herein for Grades A and B do not include reference to the specified minimum yield strength. Other grade designations used herein comprise the letter A or X followed by the first two digits of the specified minimum yield strength.
- 1.3 Pipe manufactured as Grade X60 or higher shall not be substituted for pipe ordered for Grade X52 or lower with-out purchaser approval.
- 1.4 Although plain-end line pipe meeting this specifiecation is primarily intended for field makeup by circumferential welding, the manufacturer will not assume responsibility for field welding.
- 1.5 For regular-weight and special plain-end pipe(special weight) whown in Tables 6A, 6B, and 6C and for standard weight threaded pipe larger than nominal size 12, the size designations used herein are outside diameter sizes. For all other pipe, the size designations are nominal pipe sizes. In the text of this specification, pipe size limits(or size ranges)are outside diameter sizes except where stated to be nominal. These outside diameter size limits and ranges also apply to the corresponding nominal sizes.
- 1.6 Class Ⅱ steel is rephosphorized and problbly has better threading properties than Class I. Because Class Ⅱ has higher chemical properties than Class I, it may be somewhat more difficult to bend.
- 1.7 U.S. customary units are used in this specification; metric(SI) units are shown in parenthese in the text and in many tables. See Appendix J for specific information about rounding procedures and conversion factors.
Scope:
| API 5L | B X42. X46. X52. X60 .X65. X70. X80. X100 | Line Pipe (PSL1. PSL2) |
| API 2B | Fabrication of Structure Steel Pipe | |
| ASTM A134 | Pipe, Steel, Electric-Fusion(Arc)-Welded (Size NPS 16 and over) | |
| ASTM A139 | A, B | Electric-Fusion(Arc)-Welded Steel Pipe (Size NPS 4 and over) |
| ASTM A252 | 1, 2, 3 | Welded and Seamless Steel Pipe Piles |
| ASTM A671 | All | Electric-Fusion-Welded Steel Pipe for Atmospheric & Low Temperature |
| ASTM A672 | All | Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperature |
| ASTM A691 | Carbon and Alloy Steel Pipe, Electric-Fusion Welded for High Pressure Service at High Temperatures | |
| JIS G 3444 | STK 290,400,490,500,540 | Carbon Steel Tubes for General Structural Purpose |
| JIS G 3457 | STPY 400 | Arc Welded Carbon Steel Pipe |
| KS D 3583 | SPW 400 | Arc Welded Carbon Steel Pipe |
| KS D 3566 | STK 290,400,490,500,540 | Carbon Steel Tubes for General Structural Purpose |
Chemical Composition
Grade | Mfg. Process | Chemical composition (%) | ||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | Others | ||
A25C1 Ⅰ | S | 0.21Max | - | 0.30~0.60 | 0.045Max | 0.06Max | - | - | - | - |
A25C1 Ⅱ | 0.21Max | - | 0.30~0.60 | 0.045~0.80 | 0.06Max | - | - | - | - | |
A | 0.21Ma2 | - | 0.90Max | 0.04Max | 0.05Max | - | - | - | - | |
B | 0.27Max | - | 1.15Max | 0.04Max | 0.05Max | - | - | - | - | |
X42(Non-expanded) | 0.29Max | - | 1.25Max | 0.04Max | 0.05Max | - | - | - | - | |
X42(Cold expanded) | 0.29Max | - | 1.25Max | 0.04Max | 0.05Max | - | - | - | - | |
X46(Non expanded) | 0.31Max | - | 1.35Max | 0.04Max | 0.05Max | - | - | - | - | |
X46(Cold expanded) | 0.29Max | - | 1.25Max | 0.04Max | 0.05Max | - | - | - | - | |
X52(Non expanded) | 0.31Max | - | 1.35Max | 0.04Max | 0.05Max | - | - | - | - | |
X52(Cold expanded) | 0.29Max | - | 1.25Max | 0.04Max | 0.05Max | - | - | - | - | |
X56 | 0.26Max | - | 1.35Max | - | 0.05Max | - | - | Cb 0.005Max | V 0.005Max Ti 0.005Max | |
X60 | 0.26Max | - | 1.35Max | - | 0.05Max | - | - | Cb 0.005Max | V 0.005Max Ti 0.005Max | |
X65 | - | - | - | - | - | - | - | - | - | |
X70 | - | - | - | 0.045Max | - | - | - | - | - | |
X80 | - | - | - | 0.045~0.080 | - | - | - | - | - | |
A25C1 Ⅰ | W | 0.21Max | - | 0.04Max | 0.06Max | - | - | - | - | |
A25C1 Ⅱ | 0.21Max | - | 0.04Max | 0.06Max | - | - | - | - | ||
A | 0.21Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
B | 0.26Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X42 | 0.28Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X46(Non expanded) | 0.30Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X46(Cold expanded) | 0.28Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X52(Non expanded) | 0.30Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X52(Cold expanded) | 0.28Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X56 | 0.26Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X60 | 0.26Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X65 | 0.26Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X70 | 0.23Max | - | 0.04Max | 0.05Max | - | - | - | - | ||
X80 | 0.18Max | - | 0.030Max | 0.018Max | - | - | - | - | ||
Mechanical Properties
| Grade | Tensile Test MPa or N/mm2 | Remaks (Similar to JIS) | Possibility Temperature | |
Min Yield point | Tensile Strength | |||
A25C1 Ⅰ | 172 | 310Min | - | |
A25C1 Ⅱ | 1772 | 310Min | - | |
A | 207 | 331Min | (STPG370) | |
B | 241 | 413Min | (STPG410) | |
X42(Non-expanded) | 289 | 413Min | - | |
X42(Cold expanded) | 289 | 413Min | - | |
X46(Non expanded) | 317 | 434Min | - | |
X46(Cold expanded) | 317 | 413Min | - | |
X52(Non expanded) | 358 | 455Min | - | |
X52(Cold expanded) | 358 | 455Min | - | |
X56 | 386 | 489Min | - | |
X60 | 413 | 517Min | - | |
X65 | 448 | 530Min | - | |
X70 | 482 | 565Min | - | |
X80 | 551 | 620~827 | - | |
A25C1 Ⅰ | 172 | 310Min | - | |
A25C1 Ⅱ | 172 | 310Min | - | |
A | 207 | 331Min | - | |
B | 241 | 413Min | - | |
X42 | 289 | 413Min | - | |
X46(Non expanded) | 289 | 413Min | - | |
X46(Cold expanded) | 317 | 434Min | - | |
X52(Non expanded) | 358 | 455Min | - | |
X52(Cold expanded) | 358 | 455Min | - | |
X56 | 386 | 489Min | - | |
X60 | 413 | 517Min | - | |
X65 | 448 | 530Min | - | |
X70 | 482 | 565Min | - | |
X80 | 551 | 620Min | - | |
ANSI / ASME B36.10M-1985
- TABLE 1 :APPLICABLE PIPE SPECIFICATIONS
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 1 (1/8"~2")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 2 (21/2"~4")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 3 (4"~6")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 4 (8"10")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 5 (12"~14")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 6 (14":~18")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 7 (18"~20")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 8 (20"~24")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 9 (24"~28")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 10 (28"~32")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 11 (32"~36")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 12 (36"~40")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 13 (42"~46")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 14 (46"~52")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 15 (56"~64")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 16 (64"~76")
- TABLE 2 :DIMENSIONS AND WEIGHTS OF WELDED AND SEAMLESS WROUGHT STEEL PIPE 17 (80")
