The Lap joint stub end is the fittings that are used in place of welded flanges when the support of rotating back up flanges is required. Lap Joints also named stub Ends and vanstone flared laps, it is used in place of welded flanges where rotating back up flanges are desired. Minimum lap thickness shall not be less than nominal wall thickness. Contact faces of stub ends shall have a concentric serration or spiral according to the purchaser's requirements. These lengths and radius apply for schedule 40s or thinner stainless steel pipes. Radius of fillet B is only effective to MSS SP-43 lap joint stub ends. Lap Joints are consisted of three series. Nominal Pipe Size Outside Diameter at Bevel Length Radius of Fillet Diameter of Lap A B NPS D L R G 1/

Carbon Steel Stub Ends are manufactured from A106 grade B seamless pipe 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 available in sizes 2″ thru 24″ and in standard and heavy wall thickness. Seamless stub ends are manufactured from A519/A106 hot rolled seamless to meet ASTM Fitting Specification A234WPB. ASA-A (Long Pattern) stub ends are available in size 1/2″ thru 4″ and in all wall thicknesses.  Material:  Carbon Steel ASME / ASTM SA / A234 WPB, DIN 1.0405 Dimension:  ANSI B16.9, ANSI B16.28, JIS B2312, JIS B2313 Thickness:  Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc. Size:  1/2″-80″ Minimum lap thickness shall not be less than nominal wall thickness. Contact faces of stub ends shall have a concentric serration or spiral according to the purchaser's requirements. The