Lap joint flanges are similar to other type of flanges, but it does not have a raised face. Lap joint flanges are used in conjunction with a "lap joint stub end". The total initial cost of a lap joint flange along with a stub end is around one third...
Weld neck flanges are connected to pipe by welding the pipe to the neck of the flange, which helps to pass on the stress from the weld neck to the pipe itself. This also reduces high stress concentration at the base of the hub of the weld neck...
Slip-on flange usually slips over the pipe. Slip-on flange are typically made with an inside diameter of flange slightly larger than the outside diameter of the pipe. This allows the slip on flange to slip over the pipe. Slip-on flanges are welded...
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