Published
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WITHDRAWN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
90.20
Standard under periodical review
Apr 15, 2026
Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 4: Quality requirements for glass-lined flanged steel pipes and flanged steel fittings (ISO 28721-4:2015)
60.60 Standard published
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