API SPEC 5L Line Pipe

API SPEC 5L line pipe is divided into seamless steel pipe, electric resistance welded steel pipe, used for oxygen in the oil and gas industry.

API SPEC 5L line pipe is divided into 8 kinds of submerged arc welded steel pipe according to the production process. But the main ones used are:
Seamless steel pipe (Seamless), straight seam high frequency electric resistance welded steel pipe (Electric-Resistance Arc Welding, abbreviated as ERW), straight seam submerged arc welded pipe (Longigudinally Submerged Arc Welding, abbreviated as LSAW), spiral seam submerged arc welded pipe (Spirally Submerged Arc Welding, abbreviated as SSAW) and other four.

API SPEC 5L uses:
oil delivery pipe

Main production steel pipe grades: X70 L245 L290 L320 L360 L390 L450 L485

API SPEC 5L Mechanical Properties:

Standard	Grade	Tensile strength (MPa)	Yield strength (MPa)	yield strength ratio	Elongation(%)	0 ℃ impact energy Akv (J)
GB/T9711.2	B	≥415	245～440	≤0.80	22	≥40
API SPEC 5L	X42	≥415	290～440	≤0.80	21	≥40
	X52	≥460	360～510	≤0.85	20	≥40
	X60	≥520	415～565	≤0.85	18	≥40
	X65	≥535	450～570	≤0.90	18	≥40
	X70	≥570	485～605	≤0.90	18	≥40

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