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DIN EN 10253-3 [CURRENT] references following documents:

Document number Edition Title
EN ISO 1127 1996-04 Stainless steel tubes - Dimensions, tolerances and conventional masses per unit length More 
EN ISO 6708 1995-07 Pipework components - Definition and selection of DN (nominal size) (ISO 6708:1995) More 
ISO 3419 1981-07 Non-alloy and alloy steel butt-welding fittings More 
ISO 5251 1981-04 Stainless steel butt-welding fittings More