SMF Flangetech manufactures Lap Joint Flanges for All Pressure Levels. SMF Flangetech manufactures Carbon Steel Plate Flanges in all international standards. Flanges are made in international Standards like AWWA, DIN, BS, JIS and CZECH. The Lap Joint Flanges for All Pressure Levels are primarily used on the piping fitted with the lapped pipe or with the lap joint stub ends. The main advantage of lap joint flanges is that the bolt holes can be aligned with the matching flange after the welds have been completed.