API SPEC 5L standard specifies

API SPEC 5L is a international standard specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.
 

Scope:

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.

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	Tag(s) : #Tech & Service