90.93 Standard confirmed May 7, 2021
ISO
ISO/TC 107 Metallic and other inorganic coatings
International Standard
25.220.50 Enamels
ISO 28721-4:2015 specifies the quality requirements for glass-lined flanged steel pipes and flanged steel fittings used for process plants.
WITHDRAWN
ISO 28721-4:2010
PUBLISHED
ISO 28721-4:2015
90.93
Standard confirmed
May 7, 2021