scope:

This part of ISO 21809 specifies requirements for field jointcoating of seamless or welded steel pipes for buried and submergedsections of pipeline transportation systems used in the petroleum,petrochemical and natural gas industries as defined in ISO 13623.This part of ISO 21809 specifies the qualification, application andtesting of the corrosion protection coatings applied to steelsurfaces left bare after the joining of pipes and fittings(components) by welding. This part of ISO 21809 defines andcodifies in Table 1 the different types of field joint coatings forpipelines. This part of ISO 21809 does not address requirements foradditional mechanical protection, for thermal insulation or forjoint infills of concrete weight-coated pipes.