API 5L Pipe

What is API 5L pipe

API 5L pipe for pipeline transportation systems in the petroleum and natural gas industries. This steel pipe is suitable for conveying gas, water, and oil. It covers PSL1, PSL2, Sour Services, for onshore and offshore pipelines. Manufacturing types including seamless and welded. PSL1 generally uses which equivalent to ASTM A106 B and A53 B. PSL2 is a higher specification level pipe, has more strict value on chemical and mechanical strength. Moreover, PSL2 requires more test methods. API 5L B PSL2 expressed with API 5L BN/Q/R/M. Sour Services: For sour pipelines like H2S environment, pipe material have typical restrictions on chemicals element of Carbon, P and S. API 5L B Pipe for Sour Service expressed in API 5L BNS/QS/MS

Size chart of API 5L pipe

NPS (in)	Outside Diameter (in)	API 5l Pipe Schedule
		SCH 10	SCH 20	SCH 30	SCH STD	SCH 40	SCH 60	SCH XS	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160	SCH XXS
		Wall Thickness (in)
1/8	0.405				0.068	0.068		0.095	0.095
1/4	0.54				0.088	0.088		0.119	0.119
3/8	0.675				0.091	0.091		0.126	0.126
1/2	0.84				0.109	0.109		0.147	0.147				0.187	0.294
3/4	1.05				0.113	0.113		0.154	0.154				0.219	0.308
1	1.315				0.133	0.133		0.179	0.179				0.25	0.358
1 1/4	1.66				0.14	0.14		0.191	0.191				0.25	0.382
1 1/2	1.9				0.145	0.145		0.2	0.2				0.281	0.4
2	2.375				0.154	0.154		0.218	0.218				0.344	0.436
2 1/2	2.875				0.203	0.203		0.276	0.276				0.375	0.552
3	3.5				0.216	0.216		0.3	0.3				0.438	0.6
3 1/2	4				0.226	0.226		0.318	0.318
4	4.5				0.237	0.237		0.337	0.337		0.438		0.531	0.674
5	5.563				0.258	0.258		0.375	0.375		0.5		0.625	0.75
6	6.625				0.28	0.28		0.432	0.432		0.562		0.719	0.864
8	8.625		0.25	0.277	0.322	0.322	0.406	0.5	0.5	0.594	0.719	0.812	0.906	0.875
10	10.75		0.25	0.307	0.365	0.365	0.5	0.5	0.594	0.719	0.844	1	1.125	1
12	12.75		0.25	0.33	0.375	0.406	0.562	0.5	0.688	0.844	1	1.125	1.312	1
14	14	0.25	0.312	0.375	0.375	0.438	0.594	0.5	0.75	0.938	1.094	1.25	1.406
16	16	0.25	0.312	0.375	0.375	0.5	0.656	0.5	0.844	1.031	1.219	1.438	1.594
18	18	0.25	0.312	0.438	0.375	0.562	0.75	0.5	0.938	1.156	1.375	1.562	1.781
20	20	0.25	0.375	0.5	0.375	0.594	0.812	0.5	1.031	1.281	1.5	1.75	1.969
22	22	0.25	0.375	0.5	0.375		0.875	0.5	1.125	1.375	1.625	1.875	2.125
24	24	0.25	0.375	0.562	0.375	0.688	0.969	0.5	1.219	1.531	1.812	2.062	2.344
30	30	0.312	0.5	0.625	0.375			0.5
32	32	0.312	0.5	0.625	0.375	0.688
34	34	0.312	0.5	0.625	0.375	0.688
36	36	0.312	0.5	0.625	0.375	0.75
42	42		0.5	0.625	0.375	0.75

Manufacturing process of API 5L pipe

Standard of API 5L pipe

Dimensional tolerances
Standard	Outer diameter tolerance		Wall thickness tolerance
	A25.A.B		X42-X70
	D<60.3	+0.41/-0.40mm	D<73	-160	D≥73	-120
API SPEC 5L	D≥60.3	+0.75/-0.40mm	D≥73	-120	D>73	-120
Mechanical properties
Standard	Grade	Yield strength (MPa)		Tensile strength (MPa)		Elongation
API SPEC 5L	PSL1
	A25	172		310
	A	207		331
	B	241		414
	X42	290		414
	X46	317		434
	X52	359		455
	X56	386		490
	X60	414		517
	X65	448		531
	X70	483		565
	PSL2
		Min	Max	Min	Max
	B	241	448	414	758
	X42	290	496	414	758
	X46	317	524	434	758
	X52	359	531	455	758
	X56	386	544	490	758
	X60	414	565	517	758
	X65	448	600	531	758
	X70	483	621	565	758
	X80	552	690	621	827

Chemical composition
Standard	Grade	C	Mn	P		S
Standard	Grade	Max	Max	Min	Max	Max
API SPEC 5L	PSL1
	A25II	0.21	0.6		0.03	0.03
	A25III	0.21	0.6	0.45	0.8	0.03
	A	0.22	0.9		0.03	0.03
	B	0.28	1.2		0.03	0.03
	X42	0.28	1.3		0.03	0.03
	X46.X52.X56	0.28	1.4		0.03	0.03
	X60.X65.X70	0.28	1.4		0.03	0.03
	PSL2
	B	0.24	1.2		0.025	0.015
	X42	0.24	1.3		0.025	0.015
	X46.X52.X56	0.24	1.4		0.025	0.015
	X60.X65.X70.X80	0.24	1.4		0.025	0.015

Application of API 5L pipe

High technology and high value-added product
Metallurgy field
High-pressure gas transportation
High cold and corrosion service

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