دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: most present-day seamless drill pipe falls into one of four American Petroleum Institute (API) grades. (1) E-75, with a minimum yield strength of 75,000 psi (517,125 kilopascals-kPa),a maximum yield strength of 105,000 psi (723,975 kPa),and a minimum tensile strength of 100,000 psi (689,500 kPa);(2) X- 95, with a minimum yield strength of 95,000 psi (655,025 kPa),a maximum yield strength of 125,000 psi (861,875 kPa),and a minimum tensile strength of 105,000 psi (723,975 kPa);(3) G-105, with a minimum yield strength of 105,000 psi (723,975 kPa),a maximum yield strength of 135,000 psi (930,825 kPa),and a minimum tensile strength of 115,000 psi (792,925 kPa);and S-135, with a minimum yield strength of 135,000 psi (930,825 kPa),a maximum yield strength of 165,000 psi (1,137,675 kPa),and a minimum tensile strength of 145,000 psi (999,775 kPa). V-150 is a non- API, but higher strength, grade. It has a minimum yield strength and a tensile strength of 150,000 psi (1,034,250 kPa).