eamless Pipeline, Seamless Line Pipe Standard: API 5L Application: For gas, water, transportation in Petroleum and natural gas industries Tolerance on Dimensions  

Standard	Out Diameter		Wall Thickness
API 5L	Tolerance		Tolerance
	D<60.3	+0.41mm, -0.80mm	+15.0%, -12.5%
	D≥60.3	+0.75%D, -0.75%D	+15.0%, -12.5%

  Standard  

Standard	Grade	Chemical Components (%)					Mechanical Properties
		C	Si	Mn	P	S	Tensile STrength(Mpa)	Yield STrength(Mpa)
									API 5L PSL1	A	0.22	–	0.90	0.030	0.030	≥331	≥207
B	0.28	–	1.20	0.030	0.030	≥414	≥241
X42	0.28	–	1.30	0.030	0.030	≥414	≥290
X46	0.28	–	1.40	0.030	0.030	≥434	≥317
X52	0.28	–	1.40	0.030	0.030	≥455	≥359
X56	0.28	–	1.40	0.030	0.030	≥490	≥386
X60	0.28	–	1.40	0.030	0.030	≥517	≥448
X65	0.28	–	1.40	0.030	0.030	≥531	≥448
X70	0.28	–	1.40	0.030	0.030	≥565	≥483
API 5L PSL2	B	0.24	–	1.20	0.025	0.015	≥414	≥241
	X42	0.24	–	1.30	0.025	0.015	≥414	≥290
	X46	0.24	–	1.40	0.025	0.015	≥434	≥317
	X52	0.24	–	1.40	0.025	0.015	≥455	≥359
	X56	0.24	–	1.40	0.025	0.015	≥490	≥386
	X60	0.24	–	1.40	0.025	0.015	≥517	≥414
	X65	0.24	–	1.40	0.025	0.015	≥531	≥448
	X70	0.24	–	1.40	0.025	0.015	≥565	≥483
	X80	0.24	–	1.40	0.025	0.015	≥621	≥552