DIN 28139-1 PDF
Welding necks for glass lined vessels – Part 1: Form H main flanges for clamp screw connections – Connecting dimensions
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Welding necks for glass lined vessels – Part 1: Form H main flanges for clamp screw connections – Connecting dimensions
Deutsches Institut Fur Normung E.V. (German National Standard) , 05/01/2019
DIN 28139-1 PDF
Welding necks for glass lined vessels – Part 1: Form H main flanges for clamp screw connections – Connecting dimensions