This International Standard provides requirements for the design@ manufacture and testing of hoisting equipment suitable for use in drilling and production operations. This International Standard is applicable to the following drilling and production hoisting equipment: a) hoisting sheaves; b) travelling blocks and hook blocks; c) block-to-hook adapters; d) connectors and link adapters; e) drilling hooks; f) tubing hooks and sucker-rod hooks; g) elevator links; h) casing elevators@ tubing elevators@ drill-pipe elevators and drill-collar elevators; i) sucker-rod elevators; j) rotary swivel-bail adapters; k) rotary swivels; l) power swivels; m) power subs; n) spiders@ if capable of being used as elevators; o) wire-line anchors; p) drill-string motion compensators; q) kelly spinners@ if capable of being used as hoisting equipment; r) pressure vessels and piping mounted onto hoisting equipment; s) safety clamps@ if capable of being used as hoisting equipment; t) guide dollies for traveling equipment (e.g. hooks@ blocks@ etc.). This Standard establishes requirements for two product specification levels (PSLs). These two PSL designations define different levels of technical requirements. All the requirements of Section 4 through Section 11 are applicable to PSL 1 unless specifically identified as PSL 2. PSL 2 includes all the requirements of PSL 1 plus the additional practices as stated herein. Supplementary requirements apply only when specified. Annex A gives a number of standardized supplementary requirements.