This International Standard specifies the technical delivery conditions for steel drill-pipes with upset pipe-body ends and weld-on tool joints for use in drilling and production operations in petroleum and natural gas industries for three product specification levels (PSL-1@ PSL-2 and PSL-3). The requirements for PSL-1 form the basis of this International Standard. The requirements that define different levels of standard technical requirements for PSL-2 and PSL-3 are in Annex G. This International Standard covers the following grades of drill-pipe: ??grade E drill-pipe; ??high-strength grades of drill-pipe@ grades X@ G and S. A typical drill-pipe configuration is given@ showing main elements and lengths (see Figure B.1). The main dimensions and masses of the grades of drill-pipe are given in both SI units (see Table A.1) and in USC units (see Table C.1). This International Standard can also be used for drill-pipe with tool joints not specified by ISO or API standards. By agreement between purchaser and manufacturer@ this International Standard can also be applied to other drillpipe body and/or tool-joint dimensions. This International Standard lists supplementary requirements that can optionally be agreed between purchaser and manufacturer@ for testing@ performance verification and non-destructive examination (see Annex E). This International Standard does not consider performance properties. NOTE 1 In this International Standard@ drill-pipe is designated by label 1@ label 2@ grade of material (E@ X@ G and S)@ upset type and type of rotary shouldered connection. Designations are used for the purpose of identification in ordering. NOTE 2 Reference can be made to ISO 10424-2 or API Spec 7-2 for the detailed requirements for the threading of drillpipe tool joints. NOTE 3 Reference can be made to API RP 7G for the performance properties of the drill-pipe.