Lapped flange is the same to loose flange norms of DIN2641 DIN2642 EN1092-1/02 PN6 PN10 PN16 steel of S235JR P235GH P245GH P250GH and ISO9624 PN10 PN16 steel lapped flanges, lapped flange or loose flange is similar to plate flange but difference for the flange center hole, loose or lapped flange have a bevel of 45 or other degree in the center hole of flanges.