API RP 4G:2004

This includes June 2004 Errata.

RP 4G provides guidelines and establishes recommended procedures for inspection, maintenance and repair of items for drilling and well servicing structures to maintain equipment serviceability. Items covered by this publication include masts/derricks, substructures, and accessories. This edition is a general revision and includes enhanced recommendations on inspection and personnel qualifications.

Editable Microsoft Excel Data Sheet files for this standard are also available for purchase separately.