DIN EN 1515-2:2002-03 Flanges and their joints - Bolting - Part 2: Classification of bolt materials for steel flanges, PN designated; German version EN 1515-2:2001
2002DIN EN 1515-2:2002-03 Flanges and their joints - Bolting - Part 2: Classification of bolt materials for steel flanges, PN designated; German version EN 1515-2:2001
2002DIN EN 1515-2:2002 Flanges and their joints - Bolting - Part 2: Classification of bolt materials for steel flanges, PN designated; German version EN 1515-2:2001