Lap joint flange stub end is product by our company from A53 stub end with Ring and Barrel construction ,per ansi b16.9 dimensions.The astm fittings specification is WPB W,welded with no radiograph of the weld ,and they are avaliable in sizes 2" thru 24" and in standard and heavy wall thickness .
Stub end long type and stub end shore type are two kind of stub end .