Introduction of Related Knowledge of Oil Pipe

       Oil pipe is a pipeline that transports crude oil and natural gas from oil and gas reservoirs to the surface after completion of drilling.API 5CT N80 Seamless Carbon Steel Oil Pipe is used to withstand the pressure generated in the process of exploitation. The outer diameter of the Oil pipe is generally 60.3 mm to 114.3 mm. Processing forms of Oil pipe end include: no thickening with threads and hoops, extra thickening with threads and hoops, flat end, no thickening with threads and hoops, and extra thickening with threads and hoops.

　　mechanical property:

standard	Brand name	Tensile Strength (MPa)	Yield strength (MPa)	Elongation (%)	hardness
API SPEC 5CT	J55	≥517	379～552	0.5%
	K55	≥655	379~552	0.5%
	N80	≥689	552~758	0.5%
	L80（13Cr）	≥655	552~655	0.5%	≤241HB
	P110	≥862	758~965	0.6%