drill pipe Standard: API 7 and API spec. 5D O.D 2 3/8, 3 1/2, ... 1/2, 5, 5 1/2,6 5/8 Steel Grade: E75, X95, G105, S135 drill pipeapi drill pipe:well drill ... pipeAPI 7 and API spec. 5DSpecification: O.D 2 3/8, 3 1/2 ... , 4 1/2, 5, 5 1/2,6 5/8Steel Grade: E75, X95, G105, S135Length:R1: 5.490-6.71R2: 8 ...