NA 012
DIN Standards Committee Chemical Apparatus Engineering
Standards
[Withdrawn]
DIN 28139-1
DIN 28139-1
Welding necks for glass lined vessels; form H main flanges for clamp screw connections; dimensions
Title (German)
Vorschweißbunde für emaillierte Apparate; Form H Hauptflansche für Klammerschrauben; Maße