API SPEC 5D pdf download.Specification for Drill Pipe 1 Scope 1.1 COVERAGE 1.1.1 This speciÞcation covers Group 1 and Group 3 drill pipe as described below in the designations and wall thick- nesses as shown in the standards list, Table 1, and in the dimen- sional tables (Table 7 and Table 8). The requirements of this speciÞcation apply to both...