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DIN EN 1515-3 [CURRENT] references following documents:

Document number Edition Title
EN 1759-1 2004-11 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, class designated - Part 1: Steel flanges, NPS 1/2 to 24 More 
EN 1515-1 1999-11 Flanges and their joints - Bolting - Part 1: Selection of bolting More